/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-fae578e [2019-12-18 11:46:50,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-18 11:46:50,118 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-18 11:46:50,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-18 11:46:50,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-18 11:46:50,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-18 11:46:50,138 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-18 11:46:50,143 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-18 11:46:50,144 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-18 11:46:50,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-18 11:46:50,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-18 11:46:50,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-18 11:46:50,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-18 11:46:50,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-18 11:46:50,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-18 11:46:50,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-18 11:46:50,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-18 11:46:50,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-18 11:46:50,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-18 11:46:50,168 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-18 11:46:50,171 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-18 11:46:50,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-18 11:46:50,176 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-18 11:46:50,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-18 11:46:50,181 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-12-18 11:46:50,186 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-18 11:46:50,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-18 11:46:50,188 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-18 11:46:50,189 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-18 11:46:50,190 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-18 11:46:50,190 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-18 11:46:50,191 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-18 11:46:50,191 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-18 11:46:50,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-18 11:46:50,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-18 11:46:50,195 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-18 11:46:50,195 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-18 11:46:50,212 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-18 11:46:50,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-18 11:46:50,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-18 11:46:50,214 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-18 11:46:50,214 INFO L138 SettingsManager]: * Use SBE=true [2019-12-18 11:46:50,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-18 11:46:50,214 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-18 11:46:50,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-18 11:46:50,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-18 11:46:50,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-18 11:46:50,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-18 11:46:50,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-18 11:46:50,216 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-18 11:46:50,216 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-18 11:46:50,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-18 11:46:50,216 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-18 11:46:50,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-18 11:46:50,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-18 11:46:50,217 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-18 11:46:50,217 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-18 11:46:50,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-18 11:46:50,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-18 11:46:50,218 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-18 11:46:50,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-18 11:46:50,218 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-18 11:46:50,218 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-18 11:46:50,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-18 11:46:50,218 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-18 11:46:50,219 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-18 11:46:50,219 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-18 11:46:50,487 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-18 11:46:50,502 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-18 11:46:50,505 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-18 11:46:50,506 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-18 11:46:50,506 INFO L275 PluginConnector]: CDTParser initialized [2019-12-18 11:46:50,507 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2019-12-18 11:46:50,563 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52618d403/1de3855b6a6c437aa9a6cf2d41c286ed/FLAG0fd031b3d [2019-12-18 11:46:51,102 INFO L306 CDTParser]: Found 1 translation units. [2019-12-18 11:46:51,103 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2019-12-18 11:46:51,121 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52618d403/1de3855b6a6c437aa9a6cf2d41c286ed/FLAG0fd031b3d [2019-12-18 11:46:51,368 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52618d403/1de3855b6a6c437aa9a6cf2d41c286ed [2019-12-18 11:46:51,380 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-18 11:46:51,382 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-18 11:46:51,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-18 11:46:51,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-18 11:46:51,388 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-18 11:46:51,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:46:51" (1/1) ... [2019-12-18 11:46:51,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@686485f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:46:51, skipping insertion in model container [2019-12-18 11:46:51,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:46:51" (1/1) ... [2019-12-18 11:46:51,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-18 11:46:51,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-18 11:46:51,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 11:46:51,980 INFO L203 MainTranslator]: Completed pre-run [2019-12-18 11:46:52,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 11:46:52,127 INFO L208 MainTranslator]: Completed translation [2019-12-18 11:46:52,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:46:52 WrapperNode [2019-12-18 11:46:52,128 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-18 11:46:52,129 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-18 11:46:52,129 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-18 11:46:52,130 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-18 11:46:52,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:46:52" (1/1) ... [2019-12-18 11:46:52,163 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:46:52" (1/1) ... [2019-12-18 11:46:52,183 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-18 11:46:52,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-18 11:46:52,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-18 11:46:52,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-18 11:46:52,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:46:52" (1/1) ... [2019-12-18 11:46:52,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:46:52" (1/1) ... [2019-12-18 11:46:52,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:46:52" (1/1) ... [2019-12-18 11:46:52,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:46:52" (1/1) ... [2019-12-18 11:46:52,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:46:52" (1/1) ... [2019-12-18 11:46:52,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:46:52" (1/1) ... [2019-12-18 11:46:52,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:46:52" (1/1) ... [2019-12-18 11:46:52,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-18 11:46:52,210 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-18 11:46:52,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-18 11:46:52,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-18 11:46:52,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:46:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-18 11:46:52,267 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-18 11:46:52,267 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-18 11:46:52,267 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-18 11:46:52,267 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-18 11:46:52,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-18 11:46:52,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-18 11:46:52,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-18 11:46:52,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-18 11:46:52,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-18 11:46:52,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-18 11:46:52,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-18 11:46:52,270 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-18 11:46:52,617 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-18 11:46:52,617 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-18 11:46:52,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 11:46:52 BoogieIcfgContainer [2019-12-18 11:46:52,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-18 11:46:52,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-18 11:46:52,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-18 11:46:52,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-18 11:46:52,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 11:46:51" (1/3) ... [2019-12-18 11:46:52,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13dc68d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:46:52, skipping insertion in model container [2019-12-18 11:46:52,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:46:52" (2/3) ... [2019-12-18 11:46:52,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13dc68d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:46:52, skipping insertion in model container [2019-12-18 11:46:52,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 11:46:52" (3/3) ... [2019-12-18 11:46:52,627 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2019-12-18 11:46:52,637 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-18 11:46:52,637 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-18 11:46:52,645 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-18 11:46:52,646 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-18 11:46:52,672 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,672 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,672 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,673 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,673 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,673 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,673 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,674 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,674 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,674 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,674 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,674 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,675 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,675 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,675 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,675 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,676 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,676 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,676 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,676 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,676 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,677 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,677 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,677 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,678 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,678 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,678 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,678 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,682 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,683 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,683 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,683 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,684 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,684 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,689 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,690 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,690 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,690 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,690 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,691 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:52,702 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-18 11:46:52,719 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-18 11:46:52,719 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-18 11:46:52,719 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-18 11:46:52,719 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-18 11:46:52,720 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-18 11:46:52,720 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-18 11:46:52,720 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-18 11:46:52,720 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-18 11:46:52,730 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 53 places, 51 transitions [2019-12-18 11:46:52,732 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-18 11:46:52,772 INFO L126 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-18 11:46:52,772 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 11:46:52,784 INFO L76 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 49 events. 5/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs. 6/49 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2019-12-18 11:46:52,787 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-18 11:46:52,804 INFO L126 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-18 11:46:52,804 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 11:46:52,806 INFO L76 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 49 events. 5/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs. 6/49 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2019-12-18 11:46:52,809 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 740 [2019-12-18 11:46:52,810 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-18 11:46:53,894 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2019-12-18 11:46:54,019 INFO L206 etLargeBlockEncoding]: Checked pairs total: 604 [2019-12-18 11:46:54,019 INFO L214 etLargeBlockEncoding]: Total number of compositions: 41 [2019-12-18 11:46:54,023 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-18 11:46:54,032 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-18 11:46:54,034 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-18 11:46:54,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-18 11:46:54,039 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:54,040 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-18 11:46:54,040 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:54,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:54,046 INFO L82 PathProgramCache]: Analyzing trace with hash 205828742, now seen corresponding path program 1 times [2019-12-18 11:46:54,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:54,054 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918046023] [2019-12-18 11:46:54,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:54,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:54,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918046023] [2019-12-18 11:46:54,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:46:54,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-18 11:46:54,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866751552] [2019-12-18 11:46:54,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-18 11:46:54,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:54,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-18 11:46:54,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 11:46:54,292 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-18 11:46:54,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:54,335 INFO L93 Difference]: Finished difference Result 48 states and 115 transitions. [2019-12-18 11:46:54,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 11:46:54,338 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-18 11:46:54,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:54,366 INFO L225 Difference]: With dead ends: 48 [2019-12-18 11:46:54,367 INFO L226 Difference]: Without dead ends: 28 [2019-12-18 11:46:54,368 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 11:46:54,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-18 11:46:54,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-18 11:46:54,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-18 11:46:54,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 60 transitions. [2019-12-18 11:46:54,412 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 60 transitions. Word has length 5 [2019-12-18 11:46:54,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:54,413 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 60 transitions. [2019-12-18 11:46:54,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-18 11:46:54,413 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 60 transitions. [2019-12-18 11:46:54,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-18 11:46:54,418 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:54,418 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:54,418 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:54,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:54,426 INFO L82 PathProgramCache]: Analyzing trace with hash 232906128, now seen corresponding path program 1 times [2019-12-18 11:46:54,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:54,427 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962624196] [2019-12-18 11:46:54,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:54,558 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962624196] [2019-12-18 11:46:54,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:46:54,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-18 11:46:54,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709729882] [2019-12-18 11:46:54,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-18 11:46:54,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:54,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-18 11:46:54,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 11:46:54,562 INFO L87 Difference]: Start difference. First operand 28 states and 60 transitions. Second operand 4 states. [2019-12-18 11:46:54,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:54,587 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-18 11:46:54,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 11:46:54,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-18 11:46:54,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:54,588 INFO L225 Difference]: With dead ends: 34 [2019-12-18 11:46:54,588 INFO L226 Difference]: Without dead ends: 30 [2019-12-18 11:46:54,590 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 11:46:54,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-18 11:46:54,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-18 11:46:54,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-18 11:46:54,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-18 11:46:54,598 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 7 [2019-12-18 11:46:54,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:54,600 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-18 11:46:54,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-18 11:46:54,600 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-18 11:46:54,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 11:46:54,601 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:54,601 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:54,602 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:54,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:54,602 INFO L82 PathProgramCache]: Analyzing trace with hash 484474390, now seen corresponding path program 1 times [2019-12-18 11:46:54,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:54,603 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709045055] [2019-12-18 11:46:54,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:54,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709045055] [2019-12-18 11:46:54,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:46:54,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 11:46:54,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544969689] [2019-12-18 11:46:54,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 11:46:54,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:54,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 11:46:54,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-18 11:46:54,719 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 5 states. [2019-12-18 11:46:54,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:54,750 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-18 11:46:54,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-18 11:46:54,754 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-18 11:46:54,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:54,755 INFO L225 Difference]: With dead ends: 34 [2019-12-18 11:46:54,755 INFO L226 Difference]: Without dead ends: 28 [2019-12-18 11:46:54,756 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-18 11:46:54,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-18 11:46:54,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2019-12-18 11:46:54,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-18 11:46:54,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-12-18 11:46:54,760 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 9 [2019-12-18 11:46:54,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:54,761 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-12-18 11:46:54,761 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 11:46:54,761 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-12-18 11:46:54,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 11:46:54,762 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:54,762 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:54,762 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:54,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:54,762 INFO L82 PathProgramCache]: Analyzing trace with hash 483962890, now seen corresponding path program 2 times [2019-12-18 11:46:54,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:54,763 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646254693] [2019-12-18 11:46:54,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:54,825 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646254693] [2019-12-18 11:46:54,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:46:54,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 11:46:54,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154647496] [2019-12-18 11:46:54,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 11:46:54,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:54,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 11:46:54,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-18 11:46:54,827 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 5 states. [2019-12-18 11:46:54,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:54,871 INFO L93 Difference]: Finished difference Result 32 states and 66 transitions. [2019-12-18 11:46:54,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 11:46:54,872 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-18 11:46:54,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:54,873 INFO L225 Difference]: With dead ends: 32 [2019-12-18 11:46:54,873 INFO L226 Difference]: Without dead ends: 28 [2019-12-18 11:46:54,874 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-18 11:46:54,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-18 11:46:54,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-18 11:46:54,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-18 11:46:54,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 58 transitions. [2019-12-18 11:46:54,881 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 58 transitions. Word has length 9 [2019-12-18 11:46:54,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:54,882 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 58 transitions. [2019-12-18 11:46:54,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 11:46:54,882 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 58 transitions. [2019-12-18 11:46:54,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:46:54,883 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:54,885 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:54,885 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:54,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:54,886 INFO L82 PathProgramCache]: Analyzing trace with hash 2133804259, now seen corresponding path program 3 times [2019-12-18 11:46:54,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:54,886 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378424171] [2019-12-18 11:46:54,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:54,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378424171] [2019-12-18 11:46:54,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788072006] [2019-12-18 11:46:54,986 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:46:55,075 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:46:55,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:46:55,077 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:46:55,082 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:55,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:55,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-18 11:46:55,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397323495] [2019-12-18 11:46:55,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-18 11:46:55,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:55,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-18 11:46:55,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-18 11:46:55,114 INFO L87 Difference]: Start difference. First operand 28 states and 58 transitions. Second operand 7 states. [2019-12-18 11:46:55,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:55,197 INFO L93 Difference]: Finished difference Result 32 states and 66 transitions. [2019-12-18 11:46:55,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 11:46:55,198 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-18 11:46:55,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:55,199 INFO L225 Difference]: With dead ends: 32 [2019-12-18 11:46:55,199 INFO L226 Difference]: Without dead ends: 29 [2019-12-18 11:46:55,199 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:46:55,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-18 11:46:55,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2019-12-18 11:46:55,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-18 11:46:55,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-12-18 11:46:55,207 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 10 [2019-12-18 11:46:55,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:55,209 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-12-18 11:46:55,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-18 11:46:55,209 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-12-18 11:46:55,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:46:55,210 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:55,210 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:55,410 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:55,411 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:55,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:55,411 INFO L82 PathProgramCache]: Analyzing trace with hash 2117948007, now seen corresponding path program 4 times [2019-12-18 11:46:55,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:55,412 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605618391] [2019-12-18 11:46:55,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:55,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:55,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605618391] [2019-12-18 11:46:55,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445347482] [2019-12-18 11:46:55,470 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:46:55,544 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:46:55,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:46:55,545 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 11:46:55,547 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:55,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:55,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-18 11:46:55,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878875229] [2019-12-18 11:46:55,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-18 11:46:55,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:55,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-18 11:46:55,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-18 11:46:55,565 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 7 states. [2019-12-18 11:46:55,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:55,630 INFO L93 Difference]: Finished difference Result 33 states and 68 transitions. [2019-12-18 11:46:55,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 11:46:55,631 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-18 11:46:55,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:55,631 INFO L225 Difference]: With dead ends: 33 [2019-12-18 11:46:55,632 INFO L226 Difference]: Without dead ends: 30 [2019-12-18 11:46:55,632 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:46:55,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-18 11:46:55,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-18 11:46:55,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-18 11:46:55,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-18 11:46:55,637 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 10 [2019-12-18 11:46:55,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:55,637 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-18 11:46:55,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-18 11:46:55,637 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-18 11:46:55,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:46:55,638 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:55,638 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:55,841 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:55,842 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:55,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:55,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1723422894, now seen corresponding path program 5 times [2019-12-18 11:46:55,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:55,843 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485236662] [2019-12-18 11:46:55,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:55,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:55,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485236662] [2019-12-18 11:46:55,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164709746] [2019-12-18 11:46:55,939 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:46:55,984 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:46:55,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:46:55,985 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:46:55,987 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:56,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:56,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:56,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-18 11:46:56,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767268246] [2019-12-18 11:46:56,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 11:46:56,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:56,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 11:46:56,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-18 11:46:56,006 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 8 states. [2019-12-18 11:46:56,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:56,092 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-18 11:46:56,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:46:56,093 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-18 11:46:56,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:56,094 INFO L225 Difference]: With dead ends: 34 [2019-12-18 11:46:56,094 INFO L226 Difference]: Without dead ends: 31 [2019-12-18 11:46:56,095 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:46:56,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-12-18 11:46:56,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2019-12-18 11:46:56,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-18 11:46:56,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 48 transitions. [2019-12-18 11:46:56,100 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 48 transitions. Word has length 11 [2019-12-18 11:46:56,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:56,101 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 48 transitions. [2019-12-18 11:46:56,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 11:46:56,101 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 48 transitions. [2019-12-18 11:46:56,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:46:56,101 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:56,102 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:56,304 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:56,305 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:56,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:56,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1231878834, now seen corresponding path program 6 times [2019-12-18 11:46:56,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:56,306 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657098274] [2019-12-18 11:46:56,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:56,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657098274] [2019-12-18 11:46:56,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624482023] [2019-12-18 11:46:56,379 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:46:56,433 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 11:46:56,434 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:46:56,434 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:46:56,435 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:56,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:56,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:56,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-18 11:46:56,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091196238] [2019-12-18 11:46:56,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 11:46:56,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:56,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 11:46:56,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-18 11:46:56,461 INFO L87 Difference]: Start difference. First operand 23 states and 48 transitions. Second operand 8 states. [2019-12-18 11:46:56,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:56,546 INFO L93 Difference]: Finished difference Result 35 states and 72 transitions. [2019-12-18 11:46:56,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:46:56,546 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-18 11:46:56,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:56,547 INFO L225 Difference]: With dead ends: 35 [2019-12-18 11:46:56,547 INFO L226 Difference]: Without dead ends: 32 [2019-12-18 11:46:56,547 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:46:56,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-18 11:46:56,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-12-18 11:46:56,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-18 11:46:56,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 66 transitions. [2019-12-18 11:46:56,554 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 66 transitions. Word has length 11 [2019-12-18 11:46:56,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:56,555 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 66 transitions. [2019-12-18 11:46:56,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 11:46:56,555 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 66 transitions. [2019-12-18 11:46:56,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:46:56,555 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:56,556 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:56,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:56,758 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:56,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:56,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1886502219, now seen corresponding path program 7 times [2019-12-18 11:46:56,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:56,760 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453596342] [2019-12-18 11:46:56,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:56,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453596342] [2019-12-18 11:46:56,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54750984] [2019-12-18 11:46:56,849 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:46:56,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:56,897 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:46:56,898 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:56,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:56,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:56,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-18 11:46:56,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129281295] [2019-12-18 11:46:56,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-18 11:46:56,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:56,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-18 11:46:56,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-18 11:46:56,917 INFO L87 Difference]: Start difference. First operand 32 states and 66 transitions. Second operand 9 states. [2019-12-18 11:46:56,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:56,999 INFO L93 Difference]: Finished difference Result 36 states and 74 transitions. [2019-12-18 11:46:56,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:46:57,000 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-18 11:46:57,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:57,001 INFO L225 Difference]: With dead ends: 36 [2019-12-18 11:46:57,001 INFO L226 Difference]: Without dead ends: 33 [2019-12-18 11:46:57,001 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-12-18 11:46:57,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-18 11:46:57,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2019-12-18 11:46:57,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-18 11:46:57,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 50 transitions. [2019-12-18 11:46:57,007 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 50 transitions. Word has length 12 [2019-12-18 11:46:57,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:57,008 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 50 transitions. [2019-12-18 11:46:57,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-18 11:46:57,008 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 50 transitions. [2019-12-18 11:46:57,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:46:57,009 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:57,009 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:57,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:57,212 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:57,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:57,212 INFO L82 PathProgramCache]: Analyzing trace with hash -466461505, now seen corresponding path program 8 times [2019-12-18 11:46:57,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:57,213 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565657040] [2019-12-18 11:46:57,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:57,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:57,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565657040] [2019-12-18 11:46:57,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561602859] [2019-12-18 11:46:57,273 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:46:57,321 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:46:57,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:46:57,322 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:46:57,323 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:57,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:57,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-18 11:46:57,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471696127] [2019-12-18 11:46:57,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-18 11:46:57,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:57,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-18 11:46:57,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-18 11:46:57,342 INFO L87 Difference]: Start difference. First operand 24 states and 50 transitions. Second operand 9 states. [2019-12-18 11:46:57,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:57,437 INFO L93 Difference]: Finished difference Result 37 states and 76 transitions. [2019-12-18 11:46:57,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:46:57,437 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-18 11:46:57,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:57,438 INFO L225 Difference]: With dead ends: 37 [2019-12-18 11:46:57,438 INFO L226 Difference]: Without dead ends: 34 [2019-12-18 11:46:57,439 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:46:57,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-18 11:46:57,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-12-18 11:46:57,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-18 11:46:57,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2019-12-18 11:46:57,443 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 12 [2019-12-18 11:46:57,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:57,443 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2019-12-18 11:46:57,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-18 11:46:57,443 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2019-12-18 11:46:57,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:46:57,444 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:57,444 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:57,651 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:57,651 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:57,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:57,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1647973050, now seen corresponding path program 9 times [2019-12-18 11:46:57,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:57,652 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538409378] [2019-12-18 11:46:57,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:57,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538409378] [2019-12-18 11:46:57,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201551927] [2019-12-18 11:46:57,747 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:46:57,810 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:46:57,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:46:57,811 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:46:57,813 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:57,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:57,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-18 11:46:57,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433358720] [2019-12-18 11:46:57,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:46:57,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:57,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:46:57,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:46:57,834 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand 10 states. [2019-12-18 11:46:57,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:57,968 INFO L93 Difference]: Finished difference Result 38 states and 78 transitions. [2019-12-18 11:46:57,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:46:57,969 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-18 11:46:57,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:57,970 INFO L225 Difference]: With dead ends: 38 [2019-12-18 11:46:57,970 INFO L226 Difference]: Without dead ends: 35 [2019-12-18 11:46:57,970 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:46:57,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-18 11:46:57,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2019-12-18 11:46:57,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-12-18 11:46:57,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 52 transitions. [2019-12-18 11:46:57,974 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 52 transitions. Word has length 13 [2019-12-18 11:46:57,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:57,974 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 52 transitions. [2019-12-18 11:46:57,974 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:46:57,974 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 52 transitions. [2019-12-18 11:46:57,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:46:57,975 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:57,975 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:58,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:58,179 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:58,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:58,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1575404710, now seen corresponding path program 10 times [2019-12-18 11:46:58,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:58,179 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100057650] [2019-12-18 11:46:58,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:58,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100057650] [2019-12-18 11:46:58,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126458111] [2019-12-18 11:46:58,240 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:46:58,287 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:46:58,288 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:46:58,288 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:46:58,289 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:58,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:58,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-18 11:46:58,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822228088] [2019-12-18 11:46:58,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:46:58,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:58,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:46:58,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:46:58,327 INFO L87 Difference]: Start difference. First operand 25 states and 52 transitions. Second operand 10 states. [2019-12-18 11:46:58,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:58,443 INFO L93 Difference]: Finished difference Result 39 states and 80 transitions. [2019-12-18 11:46:58,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:46:58,443 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-18 11:46:58,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:58,444 INFO L225 Difference]: With dead ends: 39 [2019-12-18 11:46:58,444 INFO L226 Difference]: Without dead ends: 36 [2019-12-18 11:46:58,444 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:46:58,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-18 11:46:58,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-18 11:46:58,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-18 11:46:58,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 74 transitions. [2019-12-18 11:46:58,448 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 74 transitions. Word has length 13 [2019-12-18 11:46:58,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:58,448 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 74 transitions. [2019-12-18 11:46:58,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:46:58,449 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 74 transitions. [2019-12-18 11:46:58,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:46:58,449 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:58,450 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:58,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:58,650 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:58,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:58,651 INFO L82 PathProgramCache]: Analyzing trace with hash 452443059, now seen corresponding path program 11 times [2019-12-18 11:46:58,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:58,651 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079796236] [2019-12-18 11:46:58,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:58,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:58,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:58,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079796236] [2019-12-18 11:46:58,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646169286] [2019-12-18 11:46:58,719 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:46:58,765 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 11:46:58,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:46:58,766 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:46:58,767 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:58,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:58,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:58,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-18 11:46:58,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977935983] [2019-12-18 11:46:58,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-18 11:46:58,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:58,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-18 11:46:58,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-18 11:46:58,795 INFO L87 Difference]: Start difference. First operand 36 states and 74 transitions. Second operand 11 states. [2019-12-18 11:46:58,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:58,943 INFO L93 Difference]: Finished difference Result 40 states and 82 transitions. [2019-12-18 11:46:58,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:46:58,943 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-18 11:46:58,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:58,944 INFO L225 Difference]: With dead ends: 40 [2019-12-18 11:46:58,945 INFO L226 Difference]: Without dead ends: 37 [2019-12-18 11:46:58,945 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2019-12-18 11:46:58,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-18 11:46:58,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2019-12-18 11:46:58,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-18 11:46:58,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2019-12-18 11:46:58,949 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 14 [2019-12-18 11:46:58,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:58,949 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2019-12-18 11:46:58,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-18 11:46:58,950 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2019-12-18 11:46:58,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:46:58,950 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:58,950 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:59,154 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:59,155 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:59,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:59,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1592905449, now seen corresponding path program 12 times [2019-12-18 11:46:59,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:59,156 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455934581] [2019-12-18 11:46:59,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:59,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455934581] [2019-12-18 11:46:59,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224710695] [2019-12-18 11:46:59,248 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:46:59,323 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 11:46:59,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:46:59,325 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:46:59,327 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:59,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:59,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-18 11:46:59,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300100995] [2019-12-18 11:46:59,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-18 11:46:59,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:59,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-18 11:46:59,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-18 11:46:59,351 INFO L87 Difference]: Start difference. First operand 26 states and 54 transitions. Second operand 11 states. [2019-12-18 11:46:59,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:59,551 INFO L93 Difference]: Finished difference Result 41 states and 84 transitions. [2019-12-18 11:46:59,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:46:59,551 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-18 11:46:59,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:59,552 INFO L225 Difference]: With dead ends: 41 [2019-12-18 11:46:59,552 INFO L226 Difference]: Without dead ends: 38 [2019-12-18 11:46:59,553 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:46:59,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-18 11:46:59,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-12-18 11:46:59,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-18 11:46:59,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2019-12-18 11:46:59,556 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 14 [2019-12-18 11:46:59,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:59,557 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2019-12-18 11:46:59,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-18 11:46:59,557 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2019-12-18 11:46:59,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-18 11:46:59,558 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:59,558 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:59,762 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:59,762 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:59,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:59,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1140833246, now seen corresponding path program 13 times [2019-12-18 11:46:59,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:59,763 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676497433] [2019-12-18 11:46:59,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:59,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676497433] [2019-12-18 11:46:59,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622537952] [2019-12-18 11:46:59,848 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:46:59,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:59,893 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:46:59,894 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:59,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:59,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:59,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-18 11:46:59,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564867326] [2019-12-18 11:46:59,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:46:59,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:59,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:46:59,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:46:59,915 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand 12 states. [2019-12-18 11:47:00,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:00,107 INFO L93 Difference]: Finished difference Result 42 states and 86 transitions. [2019-12-18 11:47:00,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:47:00,108 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-12-18 11:47:00,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:00,109 INFO L225 Difference]: With dead ends: 42 [2019-12-18 11:47:00,109 INFO L226 Difference]: Without dead ends: 39 [2019-12-18 11:47:00,110 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2019-12-18 11:47:00,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-12-18 11:47:00,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2019-12-18 11:47:00,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-18 11:47:00,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 56 transitions. [2019-12-18 11:47:00,114 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 56 transitions. Word has length 15 [2019-12-18 11:47:00,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:00,114 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 56 transitions. [2019-12-18 11:47:00,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:47:00,114 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 56 transitions. [2019-12-18 11:47:00,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-18 11:47:00,115 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:47:00,115 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:47:00,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:00,323 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:47:00,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:47:00,323 INFO L82 PathProgramCache]: Analyzing trace with hash -2135428606, now seen corresponding path program 14 times [2019-12-18 11:47:00,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:47:00,324 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126663341] [2019-12-18 11:47:00,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:47:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:00,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:00,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126663341] [2019-12-18 11:47:00,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400149283] [2019-12-18 11:47:00,400 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:47:00,447 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:47:00,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:47:00,448 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:47:00,450 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:47:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:00,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:47:00,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-18 11:47:00,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026552267] [2019-12-18 11:47:00,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:47:00,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:47:00,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:47:00,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:47:00,472 INFO L87 Difference]: Start difference. First operand 27 states and 56 transitions. Second operand 12 states. [2019-12-18 11:47:00,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:00,652 INFO L93 Difference]: Finished difference Result 43 states and 88 transitions. [2019-12-18 11:47:00,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:47:00,652 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-12-18 11:47:00,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:00,653 INFO L225 Difference]: With dead ends: 43 [2019-12-18 11:47:00,653 INFO L226 Difference]: Without dead ends: 40 [2019-12-18 11:47:00,654 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2019-12-18 11:47:00,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-12-18 11:47:00,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-12-18 11:47:00,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-18 11:47:00,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 82 transitions. [2019-12-18 11:47:00,657 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 82 transitions. Word has length 15 [2019-12-18 11:47:00,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:00,658 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 82 transitions. [2019-12-18 11:47:00,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:47:00,658 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 82 transitions. [2019-12-18 11:47:00,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-18 11:47:00,659 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:47:00,659 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:47:00,862 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:00,863 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:47:00,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:47:00,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1006092315, now seen corresponding path program 15 times [2019-12-18 11:47:00,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:47:00,863 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396019822] [2019-12-18 11:47:00,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:47:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:00,954 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396019822] [2019-12-18 11:47:00,955 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540802685] [2019-12-18 11:47:00,955 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:47:01,001 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-18 11:47:01,002 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:47:01,002 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 11:47:01,004 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:47:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:01,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:47:01,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-18 11:47:01,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161112501] [2019-12-18 11:47:01,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-18 11:47:01,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:47:01,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-18 11:47:01,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-18 11:47:01,026 INFO L87 Difference]: Start difference. First operand 40 states and 82 transitions. Second operand 13 states. [2019-12-18 11:47:01,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:01,238 INFO L93 Difference]: Finished difference Result 44 states and 90 transitions. [2019-12-18 11:47:01,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:47:01,239 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-18 11:47:01,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:01,239 INFO L225 Difference]: With dead ends: 44 [2019-12-18 11:47:01,239 INFO L226 Difference]: Without dead ends: 41 [2019-12-18 11:47:01,240 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:47:01,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-18 11:47:01,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2019-12-18 11:47:01,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-18 11:47:01,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 58 transitions. [2019-12-18 11:47:01,244 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 58 transitions. Word has length 16 [2019-12-18 11:47:01,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:01,244 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 58 transitions. [2019-12-18 11:47:01,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-18 11:47:01,244 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 58 transitions. [2019-12-18 11:47:01,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-18 11:47:01,245 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:47:01,245 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:47:01,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:01,451 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:47:01,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:47:01,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1773777041, now seen corresponding path program 16 times [2019-12-18 11:47:01,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:47:01,453 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842040425] [2019-12-18 11:47:01,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:47:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:01,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:01,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842040425] [2019-12-18 11:47:01,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763241811] [2019-12-18 11:47:01,540 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:47:01,599 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:47:01,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:47:01,600 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 11:47:01,602 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:47:01,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:01,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:47:01,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-18 11:47:01,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317088871] [2019-12-18 11:47:01,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-18 11:47:01,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:47:01,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-18 11:47:01,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-18 11:47:01,631 INFO L87 Difference]: Start difference. First operand 28 states and 58 transitions. Second operand 13 states. [2019-12-18 11:47:01,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:01,810 INFO L93 Difference]: Finished difference Result 45 states and 92 transitions. [2019-12-18 11:47:01,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:47:01,811 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-18 11:47:01,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:01,811 INFO L225 Difference]: With dead ends: 45 [2019-12-18 11:47:01,812 INFO L226 Difference]: Without dead ends: 42 [2019-12-18 11:47:01,812 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:47:01,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-12-18 11:47:01,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-12-18 11:47:01,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-18 11:47:01,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 86 transitions. [2019-12-18 11:47:01,816 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 86 transitions. Word has length 16 [2019-12-18 11:47:01,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:01,817 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 86 transitions. [2019-12-18 11:47:01,817 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-18 11:47:01,817 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 86 transitions. [2019-12-18 11:47:01,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-18 11:47:01,818 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:47:01,818 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:47:02,021 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:02,021 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:47:02,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:47:02,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1124090998, now seen corresponding path program 17 times [2019-12-18 11:47:02,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:47:02,022 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690613217] [2019-12-18 11:47:02,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:47:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:02,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690613217] [2019-12-18 11:47:02,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237671980] [2019-12-18 11:47:02,130 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:47:02,192 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-18 11:47:02,192 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:47:02,193 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 11:47:02,196 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:47:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:02,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:47:02,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-18 11:47:02,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217918853] [2019-12-18 11:47:02,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:47:02,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:47:02,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:47:02,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:47:02,219 INFO L87 Difference]: Start difference. First operand 42 states and 86 transitions. Second operand 14 states. [2019-12-18 11:47:02,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:02,456 INFO L93 Difference]: Finished difference Result 46 states and 94 transitions. [2019-12-18 11:47:02,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:47:02,457 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-18 11:47:02,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:02,458 INFO L225 Difference]: With dead ends: 46 [2019-12-18 11:47:02,458 INFO L226 Difference]: Without dead ends: 43 [2019-12-18 11:47:02,458 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2019-12-18 11:47:02,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-18 11:47:02,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2019-12-18 11:47:02,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-18 11:47:02,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 60 transitions. [2019-12-18 11:47:02,465 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 60 transitions. Word has length 17 [2019-12-18 11:47:02,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:02,465 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 60 transitions. [2019-12-18 11:47:02,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:47:02,465 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 60 transitions. [2019-12-18 11:47:02,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-18 11:47:02,466 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:47:02,466 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:47:02,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:02,669 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:47:02,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:47:02,670 INFO L82 PathProgramCache]: Analyzing trace with hash 847486634, now seen corresponding path program 18 times [2019-12-18 11:47:02,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:47:02,670 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577057124] [2019-12-18 11:47:02,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:47:02,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:02,783 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577057124] [2019-12-18 11:47:02,783 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726548156] [2019-12-18 11:47:02,784 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:47:02,855 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-18 11:47:02,855 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:47:02,856 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 11:47:02,857 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:47:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:02,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:47:02,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-18 11:47:02,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075718139] [2019-12-18 11:47:02,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:47:02,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:47:02,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:47:02,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:47:02,880 INFO L87 Difference]: Start difference. First operand 29 states and 60 transitions. Second operand 14 states. [2019-12-18 11:47:03,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:03,093 INFO L93 Difference]: Finished difference Result 47 states and 96 transitions. [2019-12-18 11:47:03,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:47:03,093 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-18 11:47:03,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:03,094 INFO L225 Difference]: With dead ends: 47 [2019-12-18 11:47:03,095 INFO L226 Difference]: Without dead ends: 44 [2019-12-18 11:47:03,095 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=357, Unknown=0, NotChecked=0, Total=552 [2019-12-18 11:47:03,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-18 11:47:03,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-12-18 11:47:03,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-18 11:47:03,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 90 transitions. [2019-12-18 11:47:03,098 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 90 transitions. Word has length 17 [2019-12-18 11:47:03,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:03,099 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 90 transitions. [2019-12-18 11:47:03,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:47:03,099 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 90 transitions. [2019-12-18 11:47:03,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-18 11:47:03,100 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:47:03,100 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:47:03,302 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:03,303 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:47:03,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:47:03,304 INFO L82 PathProgramCache]: Analyzing trace with hash 487082627, now seen corresponding path program 19 times [2019-12-18 11:47:03,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:47:03,304 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886397304] [2019-12-18 11:47:03,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:47:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:03,435 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:03,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886397304] [2019-12-18 11:47:03,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593498268] [2019-12-18 11:47:03,436 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:47:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:03,495 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 11:47:03,496 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:47:03,527 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:03,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:47:03,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-18 11:47:03,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93584171] [2019-12-18 11:47:03,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-18 11:47:03,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:47:03,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-18 11:47:03,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2019-12-18 11:47:03,530 INFO L87 Difference]: Start difference. First operand 44 states and 90 transitions. Second operand 15 states. [2019-12-18 11:47:03,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:03,760 INFO L93 Difference]: Finished difference Result 48 states and 98 transitions. [2019-12-18 11:47:03,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:47:03,761 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-18 11:47:03,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:03,762 INFO L225 Difference]: With dead ends: 48 [2019-12-18 11:47:03,762 INFO L226 Difference]: Without dead ends: 45 [2019-12-18 11:47:03,763 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:47:03,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-12-18 11:47:03,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2019-12-18 11:47:03,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-18 11:47:03,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-18 11:47:03,767 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 18 [2019-12-18 11:47:03,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:03,767 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-18 11:47:03,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-18 11:47:03,768 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-18 11:47:03,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-18 11:47:03,768 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:47:03,768 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:47:03,974 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:03,974 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:47:03,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:47:03,974 INFO L82 PathProgramCache]: Analyzing trace with hash 502282183, now seen corresponding path program 20 times [2019-12-18 11:47:03,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:47:03,975 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234190920] [2019-12-18 11:47:03,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:47:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:04,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234190920] [2019-12-18 11:47:04,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843651102] [2019-12-18 11:47:04,090 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:47:04,140 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:47:04,141 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:47:04,142 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 11:47:04,150 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:47:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:04,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:47:04,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-18 11:47:04,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144139974] [2019-12-18 11:47:04,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-18 11:47:04,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:47:04,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-18 11:47:04,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2019-12-18 11:47:04,188 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 15 states. [2019-12-18 11:47:04,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:04,437 INFO L93 Difference]: Finished difference Result 49 states and 100 transitions. [2019-12-18 11:47:04,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:47:04,437 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-18 11:47:04,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:04,438 INFO L225 Difference]: With dead ends: 49 [2019-12-18 11:47:04,438 INFO L226 Difference]: Without dead ends: 46 [2019-12-18 11:47:04,439 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2019-12-18 11:47:04,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-12-18 11:47:04,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-12-18 11:47:04,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-12-18 11:47:04,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 94 transitions. [2019-12-18 11:47:04,443 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 94 transitions. Word has length 18 [2019-12-18 11:47:04,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:04,443 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 94 transitions. [2019-12-18 11:47:04,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-18 11:47:04,443 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 94 transitions. [2019-12-18 11:47:04,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-18 11:47:04,444 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:47:04,444 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:47:04,647 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:04,647 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:47:04,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:47:04,648 INFO L82 PathProgramCache]: Analyzing trace with hash -2080307442, now seen corresponding path program 21 times [2019-12-18 11:47:04,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:47:04,649 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286083976] [2019-12-18 11:47:04,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:47:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:04,775 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286083976] [2019-12-18 11:47:04,775 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654523158] [2019-12-18 11:47:04,775 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:47:04,827 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-18 11:47:04,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:47:04,828 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-18 11:47:04,830 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:47:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:04,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:47:04,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-18 11:47:04,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819550104] [2019-12-18 11:47:04,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:47:04,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:47:04,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:47:04,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:47:04,853 INFO L87 Difference]: Start difference. First operand 46 states and 94 transitions. Second operand 16 states. [2019-12-18 11:47:05,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:05,134 INFO L93 Difference]: Finished difference Result 50 states and 102 transitions. [2019-12-18 11:47:05,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:47:05,134 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-18 11:47:05,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:05,135 INFO L225 Difference]: With dead ends: 50 [2019-12-18 11:47:05,135 INFO L226 Difference]: Without dead ends: 47 [2019-12-18 11:47:05,136 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=254, Invalid=502, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:47:05,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-18 11:47:05,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 31. [2019-12-18 11:47:05,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-12-18 11:47:05,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 64 transitions. [2019-12-18 11:47:05,139 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 64 transitions. Word has length 19 [2019-12-18 11:47:05,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:05,139 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 64 transitions. [2019-12-18 11:47:05,139 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:47:05,139 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 64 transitions. [2019-12-18 11:47:05,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-18 11:47:05,140 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:47:05,140 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:47:05,343 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:05,343 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:47:05,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:47:05,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1609121454, now seen corresponding path program 22 times [2019-12-18 11:47:05,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:47:05,345 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976805858] [2019-12-18 11:47:05,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:47:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:05,458 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:05,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976805858] [2019-12-18 11:47:05,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749645386] [2019-12-18 11:47:05,459 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:47:05,507 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:47:05,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:47:05,508 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-18 11:47:05,509 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:47:05,533 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:05,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:47:05,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-18 11:47:05,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389174893] [2019-12-18 11:47:05,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:47:05,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:47:05,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:47:05,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:47:05,537 INFO L87 Difference]: Start difference. First operand 31 states and 64 transitions. Second operand 16 states. [2019-12-18 11:47:05,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:05,819 INFO L93 Difference]: Finished difference Result 51 states and 104 transitions. [2019-12-18 11:47:05,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:47:05,819 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-18 11:47:05,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:05,820 INFO L225 Difference]: With dead ends: 51 [2019-12-18 11:47:05,820 INFO L226 Difference]: Without dead ends: 48 [2019-12-18 11:47:05,821 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:47:05,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-12-18 11:47:05,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-12-18 11:47:05,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-12-18 11:47:05,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 98 transitions. [2019-12-18 11:47:05,823 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 98 transitions. Word has length 19 [2019-12-18 11:47:05,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:05,823 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 98 transitions. [2019-12-18 11:47:05,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:47:05,823 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 98 transitions. [2019-12-18 11:47:05,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-18 11:47:05,824 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:47:05,824 INFO L411 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:47:06,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:06,025 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:47:06,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:47:06,026 INFO L82 PathProgramCache]: Analyzing trace with hash -65021205, now seen corresponding path program 23 times [2019-12-18 11:47:06,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:47:06,027 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065647303] [2019-12-18 11:47:06,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:47:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:06,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065647303] [2019-12-18 11:47:06,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686972336] [2019-12-18 11:47:06,149 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:47:06,231 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-12-18 11:47:06,231 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:47:06,232 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-18 11:47:06,234 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:47:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:06,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:47:06,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-18 11:47:06,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126277870] [2019-12-18 11:47:06,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-18 11:47:06,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:47:06,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-18 11:47:06,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2019-12-18 11:47:06,260 INFO L87 Difference]: Start difference. First operand 48 states and 98 transitions. Second operand 17 states. [2019-12-18 11:47:06,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:06,554 INFO L93 Difference]: Finished difference Result 52 states and 106 transitions. [2019-12-18 11:47:06,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:47:06,555 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-12-18 11:47:06,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:06,556 INFO L225 Difference]: With dead ends: 52 [2019-12-18 11:47:06,556 INFO L226 Difference]: Without dead ends: 49 [2019-12-18 11:47:06,557 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=538, Unknown=0, NotChecked=0, Total=812 [2019-12-18 11:47:06,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-12-18 11:47:06,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2019-12-18 11:47:06,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-18 11:47:06,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 66 transitions. [2019-12-18 11:47:06,559 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 66 transitions. Word has length 20 [2019-12-18 11:47:06,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:06,560 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 66 transitions. [2019-12-18 11:47:06,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-18 11:47:06,560 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 66 transitions. [2019-12-18 11:47:06,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-18 11:47:06,560 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:47:06,560 INFO L411 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:47:06,762 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:06,762 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:47:06,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:47:06,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1656842783, now seen corresponding path program 24 times [2019-12-18 11:47:06,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:47:06,764 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573908082] [2019-12-18 11:47:06,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:47:06,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:06,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573908082] [2019-12-18 11:47:06,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999265098] [2019-12-18 11:47:06,875 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:47:06,932 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-12-18 11:47:06,933 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:47:06,934 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-18 11:47:06,935 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:47:06,964 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:06,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:47:06,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-18 11:47:06,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147612807] [2019-12-18 11:47:06,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-18 11:47:06,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:47:06,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-18 11:47:06,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2019-12-18 11:47:06,966 INFO L87 Difference]: Start difference. First operand 32 states and 66 transitions. Second operand 17 states. [2019-12-18 11:47:07,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:07,266 INFO L93 Difference]: Finished difference Result 53 states and 108 transitions. [2019-12-18 11:47:07,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:47:07,266 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-12-18 11:47:07,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:07,267 INFO L225 Difference]: With dead ends: 53 [2019-12-18 11:47:07,267 INFO L226 Difference]: Without dead ends: 50 [2019-12-18 11:47:07,268 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=580, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:47:07,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-18 11:47:07,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-12-18 11:47:07,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-18 11:47:07,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 102 transitions. [2019-12-18 11:47:07,272 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 102 transitions. Word has length 20 [2019-12-18 11:47:07,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:07,272 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 102 transitions. [2019-12-18 11:47:07,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-18 11:47:07,272 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 102 transitions. [2019-12-18 11:47:07,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-18 11:47:07,272 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:47:07,273 INFO L411 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:47:07,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:07,476 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:47:07,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:47:07,477 INFO L82 PathProgramCache]: Analyzing trace with hash -2015657050, now seen corresponding path program 25 times [2019-12-18 11:47:07,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:47:07,477 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610478473] [2019-12-18 11:47:07,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:47:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:07,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610478473] [2019-12-18 11:47:07,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540571308] [2019-12-18 11:47:07,599 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:47:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:07,656 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-18 11:47:07,657 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:47:07,689 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:07,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:47:07,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-18 11:47:07,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324319032] [2019-12-18 11:47:07,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:47:07,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:47:07,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:47:07,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:47:07,691 INFO L87 Difference]: Start difference. First operand 50 states and 102 transitions. Second operand 18 states. [2019-12-18 11:47:08,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:08,026 INFO L93 Difference]: Finished difference Result 54 states and 110 transitions. [2019-12-18 11:47:08,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:47:08,027 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2019-12-18 11:47:08,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:08,027 INFO L225 Difference]: With dead ends: 54 [2019-12-18 11:47:08,028 INFO L226 Difference]: Without dead ends: 51 [2019-12-18 11:47:08,028 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=662, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:47:08,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-18 11:47:08,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2019-12-18 11:47:08,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-18 11:47:08,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 68 transitions. [2019-12-18 11:47:08,032 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 68 transitions. Word has length 21 [2019-12-18 11:47:08,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:08,032 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 68 transitions. [2019-12-18 11:47:08,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:47:08,032 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 68 transitions. [2019-12-18 11:47:08,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-18 11:47:08,032 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:47:08,032 INFO L411 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:47:08,234 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:08,235 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:47:08,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:47:08,235 INFO L82 PathProgramCache]: Analyzing trace with hash -177481222, now seen corresponding path program 26 times [2019-12-18 11:47:08,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:47:08,236 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475406786] [2019-12-18 11:47:08,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:47:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:08,374 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:08,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475406786] [2019-12-18 11:47:08,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58059844] [2019-12-18 11:47:08,375 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:47:08,426 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:47:08,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:47:08,427 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-18 11:47:08,429 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:47:08,466 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:08,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:47:08,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-18 11:47:08,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386101532] [2019-12-18 11:47:08,467 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:47:08,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:47:08,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:47:08,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:47:08,468 INFO L87 Difference]: Start difference. First operand 33 states and 68 transitions. Second operand 18 states. [2019-12-18 11:47:08,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:08,771 INFO L93 Difference]: Finished difference Result 55 states and 112 transitions. [2019-12-18 11:47:08,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:47:08,771 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2019-12-18 11:47:08,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:08,772 INFO L225 Difference]: With dead ends: 55 [2019-12-18 11:47:08,772 INFO L226 Difference]: Without dead ends: 52 [2019-12-18 11:47:08,773 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=307, Invalid=685, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:47:08,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-12-18 11:47:08,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-12-18 11:47:08,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-18 11:47:08,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 106 transitions. [2019-12-18 11:47:08,777 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 106 transitions. Word has length 21 [2019-12-18 11:47:08,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:08,777 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 106 transitions. [2019-12-18 11:47:08,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:47:08,777 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 106 transitions. [2019-12-18 11:47:08,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-18 11:47:08,778 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:47:08,778 INFO L411 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:47:08,981 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:08,981 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:47:08,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:47:08,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1939140947, now seen corresponding path program 27 times [2019-12-18 11:47:08,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:47:08,982 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638152520] [2019-12-18 11:47:08,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:47:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:09,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638152520] [2019-12-18 11:47:09,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518363998] [2019-12-18 11:47:09,130 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:47:09,187 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-12-18 11:47:09,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:47:09,188 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-18 11:47:09,189 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:47:09,221 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:09,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:47:09,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-18 11:47:09,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733526935] [2019-12-18 11:47:09,222 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-18 11:47:09,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:47:09,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-18 11:47:09,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:47:09,223 INFO L87 Difference]: Start difference. First operand 52 states and 106 transitions. Second operand 19 states. [2019-12-18 11:47:09,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:09,588 INFO L93 Difference]: Finished difference Result 56 states and 114 transitions. [2019-12-18 11:47:09,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:47:09,588 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2019-12-18 11:47:09,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:09,589 INFO L225 Difference]: With dead ends: 56 [2019-12-18 11:47:09,589 INFO L226 Difference]: Without dead ends: 53 [2019-12-18 11:47:09,590 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=703, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 11:47:09,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-18 11:47:09,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2019-12-18 11:47:09,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-18 11:47:09,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2019-12-18 11:47:09,593 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 22 [2019-12-18 11:47:09,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:09,593 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2019-12-18 11:47:09,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-18 11:47:09,593 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2019-12-18 11:47:09,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-18 11:47:09,594 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:47:09,594 INFO L411 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:47:09,797 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:09,797 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:47:09,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:47:09,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1206950281, now seen corresponding path program 28 times [2019-12-18 11:47:09,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:47:09,798 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936258093] [2019-12-18 11:47:09,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:47:09,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:09,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936258093] [2019-12-18 11:47:09,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29475471] [2019-12-18 11:47:09,975 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:10,059 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:47:10,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:47:10,061 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-18 11:47:10,063 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:47:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:10,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:47:10,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-18 11:47:10,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571821461] [2019-12-18 11:47:10,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-18 11:47:10,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:47:10,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-18 11:47:10,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:47:10,102 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand 19 states. [2019-12-18 11:47:10,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:10,507 INFO L93 Difference]: Finished difference Result 57 states and 116 transitions. [2019-12-18 11:47:10,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:47:10,507 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2019-12-18 11:47:10,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:10,508 INFO L225 Difference]: With dead ends: 57 [2019-12-18 11:47:10,508 INFO L226 Difference]: Without dead ends: 54 [2019-12-18 11:47:10,509 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 11:47:10,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-12-18 11:47:10,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-12-18 11:47:10,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-18 11:47:10,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 110 transitions. [2019-12-18 11:47:10,511 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 110 transitions. Word has length 22 [2019-12-18 11:47:10,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:10,512 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 110 transitions. [2019-12-18 11:47:10,512 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-18 11:47:10,512 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 110 transitions. [2019-12-18 11:47:10,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-18 11:47:10,512 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:47:10,513 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:47:10,716 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:10,716 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:47:10,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:47:10,717 INFO L82 PathProgramCache]: Analyzing trace with hash -16172482, now seen corresponding path program 29 times [2019-12-18 11:47:10,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:47:10,717 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115734775] [2019-12-18 11:47:10,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:47:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:10,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115734775] [2019-12-18 11:47:10,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902302688] [2019-12-18 11:47:10,874 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:10,935 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-12-18 11:47:10,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:47:10,937 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-18 11:47:10,938 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:47:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:10,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:47:10,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-18 11:47:10,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258021292] [2019-12-18 11:47:10,987 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 11:47:10,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:47:10,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 11:47:10,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2019-12-18 11:47:10,988 INFO L87 Difference]: Start difference. First operand 54 states and 110 transitions. Second operand 20 states. [2019-12-18 11:47:11,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:11,372 INFO L93 Difference]: Finished difference Result 58 states and 118 transitions. [2019-12-18 11:47:11,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:47:11,372 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2019-12-18 11:47:11,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:11,373 INFO L225 Difference]: With dead ends: 58 [2019-12-18 11:47:11,373 INFO L226 Difference]: Without dead ends: 55 [2019-12-18 11:47:11,374 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=416, Invalid=844, Unknown=0, NotChecked=0, Total=1260 [2019-12-18 11:47:11,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-18 11:47:11,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 35. [2019-12-18 11:47:11,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-18 11:47:11,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 72 transitions. [2019-12-18 11:47:11,377 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 72 transitions. Word has length 23 [2019-12-18 11:47:11,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:11,377 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 72 transitions. [2019-12-18 11:47:11,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 11:47:11,377 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 72 transitions. [2019-12-18 11:47:11,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-18 11:47:11,378 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:47:11,378 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:47:11,580 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:11,580 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:47:11,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:47:11,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1239247010, now seen corresponding path program 30 times [2019-12-18 11:47:11,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:47:11,582 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299242381] [2019-12-18 11:47:11,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:47:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:11,785 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:11,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299242381] [2019-12-18 11:47:11,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241334708] [2019-12-18 11:47:11,786 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:11,867 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-12-18 11:47:11,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:47:11,869 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-18 11:47:11,870 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:47:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:11,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:47:11,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-18 11:47:11,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353500131] [2019-12-18 11:47:11,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 11:47:11,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:47:11,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 11:47:11,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2019-12-18 11:47:11,901 INFO L87 Difference]: Start difference. First operand 35 states and 72 transitions. Second operand 20 states. [2019-12-18 11:47:12,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:12,288 INFO L93 Difference]: Finished difference Result 59 states and 120 transitions. [2019-12-18 11:47:12,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:47:12,289 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2019-12-18 11:47:12,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:12,290 INFO L225 Difference]: With dead ends: 59 [2019-12-18 11:47:12,290 INFO L226 Difference]: Without dead ends: 56 [2019-12-18 11:47:12,291 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=386, Invalid=874, Unknown=0, NotChecked=0, Total=1260 [2019-12-18 11:47:12,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-12-18 11:47:12,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-12-18 11:47:12,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-18 11:47:12,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 114 transitions. [2019-12-18 11:47:12,294 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 114 transitions. Word has length 23 [2019-12-18 11:47:12,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:12,294 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 114 transitions. [2019-12-18 11:47:12,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 11:47:12,294 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 114 transitions. [2019-12-18 11:47:12,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-18 11:47:12,295 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:47:12,295 INFO L411 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:47:12,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:12,496 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:47:12,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:47:12,496 INFO L82 PathProgramCache]: Analyzing trace with hash -501346885, now seen corresponding path program 31 times [2019-12-18 11:47:12,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:47:12,497 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484945502] [2019-12-18 11:47:12,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:47:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:12,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484945502] [2019-12-18 11:47:12,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018763873] [2019-12-18 11:47:12,672 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:12,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:12,756 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-18 11:47:12,758 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:47:12,803 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:12,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:47:12,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-18 11:47:12,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247664276] [2019-12-18 11:47:12,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-18 11:47:12,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:47:12,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-18 11:47:12,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2019-12-18 11:47:12,805 INFO L87 Difference]: Start difference. First operand 56 states and 114 transitions. Second operand 21 states. [2019-12-18 11:47:13,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:13,357 INFO L93 Difference]: Finished difference Result 60 states and 122 transitions. [2019-12-18 11:47:13,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:47:13,357 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2019-12-18 11:47:13,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:13,358 INFO L225 Difference]: With dead ends: 60 [2019-12-18 11:47:13,358 INFO L226 Difference]: Without dead ends: 57 [2019-12-18 11:47:13,359 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=442, Invalid=890, Unknown=0, NotChecked=0, Total=1332 [2019-12-18 11:47:13,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-12-18 11:47:13,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2019-12-18 11:47:13,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-18 11:47:13,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 74 transitions. [2019-12-18 11:47:13,362 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 74 transitions. Word has length 24 [2019-12-18 11:47:13,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:13,362 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 74 transitions. [2019-12-18 11:47:13,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-18 11:47:13,362 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 74 transitions. [2019-12-18 11:47:13,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-18 11:47:13,363 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:47:13,363 INFO L411 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:47:13,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:13,564 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:47:13,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:47:13,564 INFO L82 PathProgramCache]: Analyzing trace with hash -238048049, now seen corresponding path program 32 times [2019-12-18 11:47:13,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:47:13,564 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83243462] [2019-12-18 11:47:13,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:47:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:13,767 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:13,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83243462] [2019-12-18 11:47:13,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703565891] [2019-12-18 11:47:13,768 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:13,823 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:47:13,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:47:13,824 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-18 11:47:13,825 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:47:13,863 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:13,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:47:13,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-18 11:47:13,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524184613] [2019-12-18 11:47:13,864 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-18 11:47:13,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:47:13,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-18 11:47:13,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2019-12-18 11:47:13,865 INFO L87 Difference]: Start difference. First operand 36 states and 74 transitions. Second operand 21 states. [2019-12-18 11:47:14,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:14,275 INFO L93 Difference]: Finished difference Result 61 states and 124 transitions. [2019-12-18 11:47:14,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:47:14,276 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2019-12-18 11:47:14,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:14,276 INFO L225 Difference]: With dead ends: 61 [2019-12-18 11:47:14,276 INFO L226 Difference]: Without dead ends: 58 [2019-12-18 11:47:14,277 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=462, Invalid=944, Unknown=0, NotChecked=0, Total=1406 [2019-12-18 11:47:14,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-12-18 11:47:14,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-12-18 11:47:14,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-18 11:47:14,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 118 transitions. [2019-12-18 11:47:14,280 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 118 transitions. Word has length 24 [2019-12-18 11:47:14,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:14,280 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 118 transitions. [2019-12-18 11:47:14,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-18 11:47:14,280 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 118 transitions. [2019-12-18 11:47:14,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-18 11:47:14,281 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:47:14,281 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:47:14,484 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:14,484 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:47:14,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:47:14,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1638116054, now seen corresponding path program 33 times [2019-12-18 11:47:14,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:47:14,485 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141117682] [2019-12-18 11:47:14,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:47:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:14,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141117682] [2019-12-18 11:47:14,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966873620] [2019-12-18 11:47:14,696 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:47:14,757 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-12-18 11:47:14,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:47:14,758 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-18 11:47:14,759 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:47:14,782 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:14,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:47:14,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-18 11:47:14,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405858706] [2019-12-18 11:47:14,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-18 11:47:14,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:47:14,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-18 11:47:14,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:47:14,784 INFO L87 Difference]: Start difference. First operand 58 states and 118 transitions. Second operand 22 states. [2019-12-18 11:47:15,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:15,306 INFO L93 Difference]: Finished difference Result 62 states and 126 transitions. [2019-12-18 11:47:15,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:47:15,307 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2019-12-18 11:47:15,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:15,308 INFO L225 Difference]: With dead ends: 62 [2019-12-18 11:47:15,308 INFO L226 Difference]: Without dead ends: 59 [2019-12-18 11:47:15,309 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=512, Invalid=1048, Unknown=0, NotChecked=0, Total=1560 [2019-12-18 11:47:15,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-18 11:47:15,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 37. [2019-12-18 11:47:15,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-12-18 11:47:15,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 76 transitions. [2019-12-18 11:47:15,310 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 76 transitions. Word has length 25 [2019-12-18 11:47:15,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:15,310 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 76 transitions. [2019-12-18 11:47:15,310 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-18 11:47:15,311 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 76 transitions. [2019-12-18 11:47:15,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-18 11:47:15,311 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:47:15,311 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:47:15,514 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:15,515 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:47:15,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:47:15,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1210445130, now seen corresponding path program 34 times [2019-12-18 11:47:15,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:47:15,516 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174296150] [2019-12-18 11:47:15,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:47:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:15,712 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:15,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174296150] [2019-12-18 11:47:15,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928520169] [2019-12-18 11:47:15,713 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:47:15,761 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:47:15,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:47:15,762 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-18 11:47:15,763 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:47:15,787 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:15,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:47:15,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-18 11:47:15,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009252024] [2019-12-18 11:47:15,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-18 11:47:15,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:47:15,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-18 11:47:15,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:47:15,789 INFO L87 Difference]: Start difference. First operand 37 states and 76 transitions. Second operand 22 states. [2019-12-18 11:47:16,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:16,248 INFO L93 Difference]: Finished difference Result 63 states and 128 transitions. [2019-12-18 11:47:16,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:47:16,249 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2019-12-18 11:47:16,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:16,250 INFO L225 Difference]: With dead ends: 63 [2019-12-18 11:47:16,250 INFO L226 Difference]: Without dead ends: 60 [2019-12-18 11:47:16,251 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=527, Invalid=1033, Unknown=0, NotChecked=0, Total=1560 [2019-12-18 11:47:16,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-18 11:47:16,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-12-18 11:47:16,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-18 11:47:16,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 122 transitions. [2019-12-18 11:47:16,254 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 122 transitions. Word has length 25 [2019-12-18 11:47:16,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:16,254 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 122 transitions. [2019-12-18 11:47:16,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-18 11:47:16,254 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 122 transitions. [2019-12-18 11:47:16,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-18 11:47:16,255 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:47:16,255 INFO L411 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:47:16,457 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:16,457 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:47:16,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:47:16,458 INFO L82 PathProgramCache]: Analyzing trace with hash -758009821, now seen corresponding path program 35 times [2019-12-18 11:47:16,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:47:16,458 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831212190] [2019-12-18 11:47:16,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:47:16,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:16,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831212190] [2019-12-18 11:47:16,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71533124] [2019-12-18 11:47:16,692 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:47:16,751 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-12-18 11:47:16,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:47:16,752 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-18 11:47:16,752 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:47:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:16,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:47:16,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-12-18 11:47:16,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74439910] [2019-12-18 11:47:16,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-18 11:47:16,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:47:16,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-18 11:47:16,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:47:16,784 INFO L87 Difference]: Start difference. First operand 60 states and 122 transitions. Second operand 23 states. [2019-12-18 11:47:17,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:17,284 INFO L93 Difference]: Finished difference Result 64 states and 130 transitions. [2019-12-18 11:47:17,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:47:17,284 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2019-12-18 11:47:17,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:17,285 INFO L225 Difference]: With dead ends: 64 [2019-12-18 11:47:17,285 INFO L226 Difference]: Without dead ends: 61 [2019-12-18 11:47:17,286 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=541, Invalid=1099, Unknown=0, NotChecked=0, Total=1640 [2019-12-18 11:47:17,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-12-18 11:47:17,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2019-12-18 11:47:17,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-18 11:47:17,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2019-12-18 11:47:17,287 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 26 [2019-12-18 11:47:17,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:17,287 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2019-12-18 11:47:17,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-18 11:47:17,288 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2019-12-18 11:47:17,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-18 11:47:17,288 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:47:17,288 INFO L411 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:47:17,488 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:17,489 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:47:17,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:47:17,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1130906329, now seen corresponding path program 36 times [2019-12-18 11:47:17,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:47:17,490 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528502653] [2019-12-18 11:47:17,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:47:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:17,663 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:17,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528502653] [2019-12-18 11:47:17,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852753186] [2019-12-18 11:47:17,664 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:47:17,723 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-12-18 11:47:17,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:47:17,724 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-18 11:47:17,725 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:47:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:17,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:47:17,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-12-18 11:47:17,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677799266] [2019-12-18 11:47:17,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-18 11:47:17,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:47:17,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-18 11:47:17,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:47:17,765 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand 23 states. [2019-12-18 11:47:18,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:18,256 INFO L93 Difference]: Finished difference Result 65 states and 132 transitions. [2019-12-18 11:47:18,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:47:18,256 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2019-12-18 11:47:18,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:18,257 INFO L225 Difference]: With dead ends: 65 [2019-12-18 11:47:18,257 INFO L226 Difference]: Without dead ends: 62 [2019-12-18 11:47:18,258 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=1159, Unknown=0, NotChecked=0, Total=1722 [2019-12-18 11:47:18,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-18 11:47:18,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-12-18 11:47:18,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-18 11:47:18,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 126 transitions. [2019-12-18 11:47:18,262 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 126 transitions. Word has length 26 [2019-12-18 11:47:18,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:18,262 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 126 transitions. [2019-12-18 11:47:18,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-18 11:47:18,262 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 126 transitions. [2019-12-18 11:47:18,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-18 11:47:18,262 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:47:18,263 INFO L411 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:47:18,466 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:18,466 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:47:18,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:47:18,466 INFO L82 PathProgramCache]: Analyzing trace with hash -2023467666, now seen corresponding path program 37 times [2019-12-18 11:47:18,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:47:18,467 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692423024] [2019-12-18 11:47:18,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:47:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:18,715 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:18,715 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692423024] [2019-12-18 11:47:18,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773418359] [2019-12-18 11:47:18,716 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:47:18,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:18,798 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-18 11:47:18,799 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:47:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:18,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:47:18,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-18 11:47:18,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468331994] [2019-12-18 11:47:18,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-18 11:47:18,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:47:18,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-18 11:47:18,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2019-12-18 11:47:18,829 INFO L87 Difference]: Start difference. First operand 62 states and 126 transitions. Second operand 24 states. [2019-12-18 11:47:19,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:19,367 INFO L93 Difference]: Finished difference Result 66 states and 134 transitions. [2019-12-18 11:47:19,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 11:47:19,368 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2019-12-18 11:47:19,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:19,368 INFO L225 Difference]: With dead ends: 66 [2019-12-18 11:47:19,369 INFO L226 Difference]: Without dead ends: 63 [2019-12-18 11:47:19,370 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=618, Invalid=1274, Unknown=0, NotChecked=0, Total=1892 [2019-12-18 11:47:19,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-12-18 11:47:19,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2019-12-18 11:47:19,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-18 11:47:19,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 80 transitions. [2019-12-18 11:47:19,372 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 80 transitions. Word has length 27 [2019-12-18 11:47:19,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:19,372 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 80 transitions. [2019-12-18 11:47:19,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-18 11:47:19,373 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 80 transitions. [2019-12-18 11:47:19,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-18 11:47:19,373 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:47:19,373 INFO L411 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:47:19,575 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:19,576 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:47:19,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:47:19,576 INFO L82 PathProgramCache]: Analyzing trace with hash -698357774, now seen corresponding path program 38 times [2019-12-18 11:47:19,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:47:19,577 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38083686] [2019-12-18 11:47:19,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:47:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:19,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38083686] [2019-12-18 11:47:19,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160357044] [2019-12-18 11:47:19,780 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:47:19,827 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:47:19,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:47:19,829 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-18 11:47:19,829 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:47:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:19,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:47:19,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-18 11:47:19,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390783013] [2019-12-18 11:47:19,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-18 11:47:19,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:47:19,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-18 11:47:19,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2019-12-18 11:47:19,867 INFO L87 Difference]: Start difference. First operand 39 states and 80 transitions. Second operand 24 states. [2019-12-18 11:47:20,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:20,364 INFO L93 Difference]: Finished difference Result 67 states and 136 transitions. [2019-12-18 11:47:20,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 11:47:20,364 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2019-12-18 11:47:20,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:20,365 INFO L225 Difference]: With dead ends: 67 [2019-12-18 11:47:20,365 INFO L226 Difference]: Without dead ends: 64 [2019-12-18 11:47:20,366 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=635, Invalid=1257, Unknown=0, NotChecked=0, Total=1892 [2019-12-18 11:47:20,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-12-18 11:47:20,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-12-18 11:47:20,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-12-18 11:47:20,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 130 transitions. [2019-12-18 11:47:20,369 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 130 transitions. Word has length 27 [2019-12-18 11:47:20,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:20,369 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 130 transitions. [2019-12-18 11:47:20,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-18 11:47:20,369 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 130 transitions. [2019-12-18 11:47:20,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-18 11:47:20,369 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:47:20,370 INFO L411 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:47:20,573 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:20,573 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:47:20,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:47:20,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1697011851, now seen corresponding path program 39 times [2019-12-18 11:47:20,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:47:20,574 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775833767] [2019-12-18 11:47:20,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:47:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:20,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775833767] [2019-12-18 11:47:20,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767328939] [2019-12-18 11:47:20,770 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:47:20,843 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-12-18 11:47:20,843 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:47:20,844 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:47:20,845 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:47:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:20,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-18 11:47:20,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2019-12-18 11:47:20,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404098105] [2019-12-18 11:47:20,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-18 11:47:20,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:47:20,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-18 11:47:20,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:47:20,855 INFO L87 Difference]: Start difference. First operand 64 states and 130 transitions. Second operand 13 states. [2019-12-18 11:47:20,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:20,899 INFO L93 Difference]: Finished difference Result 271 states and 497 transitions. [2019-12-18 11:47:20,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:47:20,899 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2019-12-18 11:47:20,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:20,900 INFO L225 Difference]: With dead ends: 271 [2019-12-18 11:47:20,900 INFO L226 Difference]: Without dead ends: 40 [2019-12-18 11:47:20,900 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:47:20,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-12-18 11:47:20,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-12-18 11:47:20,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-18 11:47:20,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 64 transitions. [2019-12-18 11:47:20,902 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 64 transitions. Word has length 28 [2019-12-18 11:47:20,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:20,902 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 64 transitions. [2019-12-18 11:47:20,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-18 11:47:20,903 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 64 transitions. [2019-12-18 11:47:20,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-18 11:47:20,903 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:47:20,903 INFO L411 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:47:21,104 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:21,104 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:47:21,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:47:21,104 INFO L82 PathProgramCache]: Analyzing trace with hash -174254209, now seen corresponding path program 40 times [2019-12-18 11:47:21,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:47:21,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755207790] [2019-12-18 11:47:21,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:47:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:47:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:21,371 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755207790] [2019-12-18 11:47:21,371 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590565493] [2019-12-18 11:47:21,371 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:47:21,426 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:47:21,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:47:21,427 INFO L264 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:47:21,428 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:47:21,606 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:47:21,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-18 11:47:21,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [22] total 35 [2019-12-18 11:47:21,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496246575] [2019-12-18 11:47:21,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-18 11:47:21,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:47:21,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-18 11:47:21,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2019-12-18 11:47:21,608 INFO L87 Difference]: Start difference. First operand 40 states and 64 transitions. Second operand 13 states. [2019-12-18 11:47:21,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:47:21,639 INFO L93 Difference]: Finished difference Result 131 states and 179 transitions. [2019-12-18 11:47:21,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:47:21,644 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2019-12-18 11:47:21,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:47:21,644 INFO L225 Difference]: With dead ends: 131 [2019-12-18 11:47:21,644 INFO L226 Difference]: Without dead ends: 0 [2019-12-18 11:47:21,645 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2019-12-18 11:47:21,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-18 11:47:21,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-18 11:47:21,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-18 11:47:21,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-18 11:47:21,646 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2019-12-18 11:47:21,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:47:21,646 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-18 11:47:21,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-18 11:47:21,647 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-18 11:47:21,647 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-18 11:47:21,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:47:21,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 11:47:21 BasicIcfg [2019-12-18 11:47:21,853 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-18 11:47:21,855 INFO L168 Benchmark]: Toolchain (without parser) took 30473.68 ms. Allocated memory was 143.7 MB in the beginning and 391.6 MB in the end (delta: 248.0 MB). Free memory was 100.0 MB in the beginning and 230.4 MB in the end (delta: -130.4 MB). Peak memory consumption was 117.6 MB. Max. memory is 7.1 GB. [2019-12-18 11:47:21,855 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 143.7 MB. Free memory was 120.0 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-12-18 11:47:21,856 INFO L168 Benchmark]: CACSL2BoogieTranslator took 744.64 ms. Allocated memory was 143.7 MB in the beginning and 202.4 MB in the end (delta: 58.7 MB). Free memory was 99.6 MB in the beginning and 161.8 MB in the end (delta: -62.2 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. [2019-12-18 11:47:21,856 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.38 ms. Allocated memory is still 202.4 MB. Free memory was 161.8 MB in the beginning and 159.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-12-18 11:47:21,856 INFO L168 Benchmark]: Boogie Preprocessor took 26.27 ms. Allocated memory is still 202.4 MB. Free memory was 159.6 MB in the beginning and 158.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2019-12-18 11:47:21,857 INFO L168 Benchmark]: RCFGBuilder took 407.93 ms. Allocated memory is still 202.4 MB. Free memory was 158.3 MB in the beginning and 138.6 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2019-12-18 11:47:21,857 INFO L168 Benchmark]: TraceAbstraction took 29233.84 ms. Allocated memory was 202.4 MB in the beginning and 391.6 MB in the end (delta: 189.3 MB). Free memory was 137.9 MB in the beginning and 230.4 MB in the end (delta: -92.5 MB). Peak memory consumption was 96.8 MB. Max. memory is 7.1 GB. [2019-12-18 11:47:21,860 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 143.7 MB. Free memory was 120.0 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 744.64 ms. Allocated memory was 143.7 MB in the beginning and 202.4 MB in the end (delta: 58.7 MB). Free memory was 99.6 MB in the beginning and 161.8 MB in the end (delta: -62.2 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 54.38 ms. Allocated memory is still 202.4 MB. Free memory was 161.8 MB in the beginning and 159.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.27 ms. Allocated memory is still 202.4 MB. Free memory was 159.6 MB in the beginning and 158.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 407.93 ms. Allocated memory is still 202.4 MB. Free memory was 158.3 MB in the beginning and 138.6 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 29233.84 ms. Allocated memory was 202.4 MB in the beginning and 391.6 MB in the end (delta: 189.3 MB). Free memory was 137.9 MB in the beginning and 230.4 MB in the end (delta: -92.5 MB). Peak memory consumption was 96.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.2s, 53 ProgramPointsBefore, 16 ProgramPointsAfterwards, 51 TransitionsBefore, 14 TransitionsAfterwards, 740 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 21 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 3 ChoiceCompositions, 380 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 9 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 604 CheckedPairsTotal, 41 TotalNumberOfCompositions - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Result: SAFE, OverallTime: 29.1s, OverallIterations: 42, TraceHistogramMax: 11, AutomataDifference: 10.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 537 SDtfs, 1333 SDslu, 1301 SDs, 0 SdLazy, 1695 SolverSat, 1565 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1587 GetRequests, 638 SyntacticMatches, 0 SemanticMatches, 949 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4904 ImplicationChecksByTransitivity, 12.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=40, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 42 MinimizatonAttempts, 285 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 1474 NumberOfCodeBlocks, 1473 NumberOfCodeBlocksAsserted, 189 NumberOfCheckSat, 1394 ConstructedInterpolants, 0 QuantifiedInterpolants, 86948 SizeOfPredicates, 378 NumberOfNonLiveVariables, 4709 ConjunctsInSsa, 586 ConjunctsInUnsatCore, 80 InterpolantComputations, 6 PerfectInterpolantSequences, 290/2860 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...