/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-17 22:57:18,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-17 22:57:18,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-17 22:57:18,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-17 22:57:18,199 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-17 22:57:18,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-17 22:57:18,202 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-17 22:57:18,212 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-17 22:57:18,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-17 22:57:18,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-17 22:57:18,220 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-17 22:57:18,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-17 22:57:18,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-17 22:57:18,224 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-17 22:57:18,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-17 22:57:18,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-17 22:57:18,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-17 22:57:18,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-17 22:57:18,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-17 22:57:18,237 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-17 22:57:18,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-17 22:57:18,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-17 22:57:18,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-17 22:57:18,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-17 22:57:18,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-17 22:57:18,249 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-17 22:57:18,249 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-17 22:57:18,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-17 22:57:18,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-17 22:57:18,251 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-17 22:57:18,252 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-17 22:57:18,252 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-17 22:57:18,253 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-17 22:57:18,254 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-17 22:57:18,255 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-17 22:57:18,255 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-17 22:57:18,256 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-17 22:57:18,256 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-17 22:57:18,256 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-17 22:57:18,257 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-17 22:57:18,258 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-17 22:57:18,259 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe.epf [2020-04-17 22:57:18,274 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-17 22:57:18,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-17 22:57:18,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-17 22:57:18,276 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-17 22:57:18,276 INFO L138 SettingsManager]: * Use SBE=true [2020-04-17 22:57:18,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-17 22:57:18,276 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-17 22:57:18,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-17 22:57:18,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-17 22:57:18,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-17 22:57:18,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-17 22:57:18,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-17 22:57:18,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-17 22:57:18,278 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-17 22:57:18,278 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-17 22:57:18,278 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-17 22:57:18,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-17 22:57:18,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-17 22:57:18,279 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-17 22:57:18,279 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-17 22:57:18,279 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-17 22:57:18,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 22:57:18,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-17 22:57:18,280 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-17 22:57:18,280 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-17 22:57:18,280 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-17 22:57:18,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-17 22:57:18,280 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-04-17 22:57:18,280 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-17 22:57:18,281 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-17 22:57:18,587 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-17 22:57:18,604 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-17 22:57:18,608 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-17 22:57:18,609 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-17 22:57:18,610 INFO L275 PluginConnector]: CDTParser initialized [2020-04-17 22:57:18,611 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-2.i [2020-04-17 22:57:18,694 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90b989ae1/100106ac8b164d47963d127fb1c66bae/FLAGb6e29651f [2020-04-17 22:57:19,285 INFO L306 CDTParser]: Found 1 translation units. [2020-04-17 22:57:19,286 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i [2020-04-17 22:57:19,301 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90b989ae1/100106ac8b164d47963d127fb1c66bae/FLAGb6e29651f [2020-04-17 22:57:19,585 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90b989ae1/100106ac8b164d47963d127fb1c66bae [2020-04-17 22:57:19,593 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-17 22:57:19,617 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-17 22:57:19,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-17 22:57:19,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-17 22:57:19,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-17 22:57:19,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 10:57:19" (1/1) ... [2020-04-17 22:57:19,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a6a0bd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:19, skipping insertion in model container [2020-04-17 22:57:19,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 10:57:19" (1/1) ... [2020-04-17 22:57:19,634 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-17 22:57:19,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-17 22:57:20,159 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 22:57:20,171 INFO L203 MainTranslator]: Completed pre-run [2020-04-17 22:57:20,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 22:57:20,303 INFO L208 MainTranslator]: Completed translation [2020-04-17 22:57:20,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20 WrapperNode [2020-04-17 22:57:20,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-17 22:57:20,305 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-17 22:57:20,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-17 22:57:20,305 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-17 22:57:20,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,330 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-17 22:57:20,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-17 22:57:20,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-17 22:57:20,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-17 22:57:20,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-17 22:57:20,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-17 22:57:20,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-17 22:57:20,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-17 22:57:20,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 22:57:20,448 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-17 22:57:20,449 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-17 22:57:20,449 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-17 22:57:20,449 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-17 22:57:20,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-17 22:57:20,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-17 22:57:20,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-17 22:57:20,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-17 22:57:20,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-17 22:57:20,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-17 22:57:20,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-17 22:57:20,452 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-17 22:57:20,813 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-17 22:57:20,813 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-17 22:57:20,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 10:57:20 BoogieIcfgContainer [2020-04-17 22:57:20,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-17 22:57:20,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-17 22:57:20,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-17 22:57:20,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-17 22:57:20,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 10:57:19" (1/3) ... [2020-04-17 22:57:20,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4938249f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 10:57:20, skipping insertion in model container [2020-04-17 22:57:20,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (2/3) ... [2020-04-17 22:57:20,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4938249f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 10:57:20, skipping insertion in model container [2020-04-17 22:57:20,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 10:57:20" (3/3) ... [2020-04-17 22:57:20,834 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench-2.i [2020-04-17 22:57:20,843 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-17 22:57:20,843 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-17 22:57:20,849 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-17 22:57:20,850 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-17 22:57:20,874 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,874 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,875 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,875 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,876 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,876 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,876 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,877 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,877 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,877 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,878 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,878 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,878 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,878 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,879 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,879 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,880 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,880 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,880 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,880 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,881 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,881 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,881 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,882 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,882 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,882 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,883 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,883 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,883 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,883 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,887 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,887 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,888 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,888 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,888 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,889 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,894 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,894 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,895 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,895 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,895 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,895 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,911 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-17 22:57:20,934 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 22:57:20,935 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 22:57:20,935 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 22:57:20,935 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 22:57:20,936 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 22:57:20,936 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 22:57:20,936 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 22:57:20,936 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 22:57:20,957 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-04-17 22:57:20,959 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-17 22:57:21,009 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-17 22:57:21,010 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 22:57:21,015 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-04-17 22:57:21,018 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-17 22:57:21,035 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-17 22:57:21,036 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 22:57:21,037 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-04-17 22:57:21,039 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-04-17 22:57:21,040 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-17 22:57:22,382 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-04-17 22:57:22,460 INFO L206 etLargeBlockEncoding]: Checked pairs total: 879 [2020-04-17 22:57:22,461 INFO L214 etLargeBlockEncoding]: Total number of compositions: 48 [2020-04-17 22:57:22,465 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-04-17 22:57:22,477 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-17 22:57:22,479 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-17 22:57:22,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-17 22:57:22,485 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:22,486 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-17 22:57:22,486 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:22,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:22,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-04-17 22:57:22,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:22,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550495235] [2020-04-17 22:57:22,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:22,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:22,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550495235] [2020-04-17 22:57:22,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:22,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 22:57:22,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777383793] [2020-04-17 22:57:22,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 22:57:22,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:22,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 22:57:22,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:57:22,787 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-17 22:57:22,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:22,872 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-04-17 22:57:22,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 22:57:22,874 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-17 22:57:22,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:22,887 INFO L225 Difference]: With dead ends: 83 [2020-04-17 22:57:22,888 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 22:57:22,890 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:57:22,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 22:57:22,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-04-17 22:57:22,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 22:57:22,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-04-17 22:57:22,935 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-04-17 22:57:22,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:22,936 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-04-17 22:57:22,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 22:57:22,936 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-04-17 22:57:22,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 22:57:22,937 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:22,938 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:22,938 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:22,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:22,939 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-04-17 22:57:22,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:22,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497750685] [2020-04-17 22:57:22,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:23,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:23,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497750685] [2020-04-17 22:57:23,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:23,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:57:23,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324179848] [2020-04-17 22:57:23,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:57:23,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:23,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:57:23,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:57:23,085 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-04-17 22:57:23,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:23,178 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-04-17 22:57:23,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:57:23,179 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 22:57:23,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:23,180 INFO L225 Difference]: With dead ends: 80 [2020-04-17 22:57:23,181 INFO L226 Difference]: Without dead ends: 75 [2020-04-17 22:57:23,182 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:57:23,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-17 22:57:23,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-04-17 22:57:23,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-17 22:57:23,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-04-17 22:57:23,193 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-04-17 22:57:23,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:23,194 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-04-17 22:57:23,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:57:23,194 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-04-17 22:57:23,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 22:57:23,195 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:23,195 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:23,196 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:23,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:23,196 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-04-17 22:57:23,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:23,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109309546] [2020-04-17 22:57:23,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:23,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:23,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109309546] [2020-04-17 22:57:23,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:23,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:57:23,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693308537] [2020-04-17 22:57:23,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:57:23,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:23,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:57:23,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:57:23,316 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-04-17 22:57:23,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:23,346 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-04-17 22:57:23,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 22:57:23,347 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 22:57:23,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:23,348 INFO L225 Difference]: With dead ends: 73 [2020-04-17 22:57:23,348 INFO L226 Difference]: Without dead ends: 70 [2020-04-17 22:57:23,349 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:57:23,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-04-17 22:57:23,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-04-17 22:57:23,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 22:57:23,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-04-17 22:57:23,358 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-04-17 22:57:23,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:23,359 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-04-17 22:57:23,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:57:23,359 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-04-17 22:57:23,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 22:57:23,360 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:23,360 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:23,361 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:23,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:23,361 INFO L82 PathProgramCache]: Analyzing trace with hash -244724056, now seen corresponding path program 2 times [2020-04-17 22:57:23,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:23,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088595652] [2020-04-17 22:57:23,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:23,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088595652] [2020-04-17 22:57:23,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:23,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:57:23,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481797389] [2020-04-17 22:57:23,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:57:23,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:23,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:57:23,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:57:23,462 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-04-17 22:57:23,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:23,535 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-04-17 22:57:23,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:57:23,536 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 22:57:23,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:23,537 INFO L225 Difference]: With dead ends: 86 [2020-04-17 22:57:23,538 INFO L226 Difference]: Without dead ends: 80 [2020-04-17 22:57:23,538 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:57:23,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-04-17 22:57:23,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-04-17 22:57:23,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 22:57:23,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-04-17 22:57:23,547 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-04-17 22:57:23,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:23,547 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-04-17 22:57:23,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:57:23,548 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-04-17 22:57:23,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 22:57:23,549 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:23,549 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:23,549 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:23,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:23,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 2 times [2020-04-17 22:57:23,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:23,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330621598] [2020-04-17 22:57:23,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:23,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330621598] [2020-04-17 22:57:23,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958439821] [2020-04-17 22:57:23,662 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:23,728 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:23,728 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:23,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:57:23,735 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:23,814 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:23,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:23,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-04-17 22:57:23,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610853308] [2020-04-17 22:57:23,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 22:57:23,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:23,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 22:57:23,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-04-17 22:57:23,839 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-04-17 22:57:23,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:23,936 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-04-17 22:57:23,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:23,937 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-04-17 22:57:23,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:23,938 INFO L225 Difference]: With dead ends: 101 [2020-04-17 22:57:23,938 INFO L226 Difference]: Without dead ends: 96 [2020-04-17 22:57:23,939 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:23,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-17 22:57:23,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-04-17 22:57:23,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-17 22:57:23,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-04-17 22:57:23,947 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-04-17 22:57:23,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:23,948 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-04-17 22:57:23,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 22:57:23,948 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-04-17 22:57:23,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 22:57:23,949 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:23,949 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:24,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:24,155 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:24,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:24,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-04-17 22:57:24,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:24,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447796219] [2020-04-17 22:57:24,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:24,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447796219] [2020-04-17 22:57:24,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897585600] [2020-04-17 22:57:24,268 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:24,323 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:24,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:24,324 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:57:24,325 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:24,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:24,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-17 22:57:24,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566398308] [2020-04-17 22:57:24,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:57:24,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:24,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:57:24,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:57:24,427 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-04-17 22:57:24,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:24,469 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-04-17 22:57:24,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:57:24,470 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-04-17 22:57:24,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:24,472 INFO L225 Difference]: With dead ends: 84 [2020-04-17 22:57:24,472 INFO L226 Difference]: Without dead ends: 81 [2020-04-17 22:57:24,472 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:57:24,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-04-17 22:57:24,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-04-17 22:57:24,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 22:57:24,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-04-17 22:57:24,481 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-04-17 22:57:24,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:24,481 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-04-17 22:57:24,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:57:24,481 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-04-17 22:57:24,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 22:57:24,501 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:24,501 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:24,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:24,706 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:24,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:24,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1003489542, now seen corresponding path program 4 times [2020-04-17 22:57:24,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:24,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943509796] [2020-04-17 22:57:24,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:24,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:24,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943509796] [2020-04-17 22:57:24,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725078355] [2020-04-17 22:57:24,773 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:24,820 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:24,821 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:24,822 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:57:24,823 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:24,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:24,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-17 22:57:24,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218015913] [2020-04-17 22:57:24,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:57:24,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:24,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:57:24,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:57:24,881 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-04-17 22:57:24,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:24,936 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-04-17 22:57:24,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:57:24,937 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-04-17 22:57:24,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:24,938 INFO L225 Difference]: With dead ends: 90 [2020-04-17 22:57:24,938 INFO L226 Difference]: Without dead ends: 87 [2020-04-17 22:57:24,939 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-04-17 22:57:24,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-04-17 22:57:24,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-04-17 22:57:24,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 22:57:24,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-04-17 22:57:24,946 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-04-17 22:57:24,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:24,947 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-04-17 22:57:24,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:57:24,947 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-04-17 22:57:24,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 22:57:24,948 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:24,948 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:25,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:25,153 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:25,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:25,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1003511862, now seen corresponding path program 5 times [2020-04-17 22:57:25,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:25,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945851683] [2020-04-17 22:57:25,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:25,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:25,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945851683] [2020-04-17 22:57:25,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109816703] [2020-04-17 22:57:25,206 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:25,252 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:25,252 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:25,253 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:57:25,254 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:25,304 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:25,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:25,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-17 22:57:25,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228788046] [2020-04-17 22:57:25,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:57:25,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:25,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:57:25,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:57:25,320 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-04-17 22:57:25,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:25,429 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-04-17 22:57:25,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:25,429 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-04-17 22:57:25,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:25,431 INFO L225 Difference]: With dead ends: 99 [2020-04-17 22:57:25,431 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 22:57:25,431 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:57:25,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 22:57:25,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-04-17 22:57:25,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-04-17 22:57:25,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-04-17 22:57:25,439 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-04-17 22:57:25,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:25,439 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-04-17 22:57:25,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:57:25,439 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-04-17 22:57:25,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:25,440 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:25,440 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:25,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:25,645 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:25,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:25,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-04-17 22:57:25,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:25,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670375503] [2020-04-17 22:57:25,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:25,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670375503] [2020-04-17 22:57:25,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:25,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 22:57:25,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201313723] [2020-04-17 22:57:25,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 22:57:25,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:25,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 22:57:25,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-17 22:57:25,724 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-04-17 22:57:25,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:25,759 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-04-17 22:57:25,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:57:25,759 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 22:57:25,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:25,760 INFO L225 Difference]: With dead ends: 92 [2020-04-17 22:57:25,760 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 22:57:25,761 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-17 22:57:25,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 22:57:25,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-04-17 22:57:25,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-17 22:57:25,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-04-17 22:57:25,767 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-04-17 22:57:25,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:25,768 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-04-17 22:57:25,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 22:57:25,768 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-04-17 22:57:25,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:25,769 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:25,769 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:25,770 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:25,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:25,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 2 times [2020-04-17 22:57:25,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:25,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724654011] [2020-04-17 22:57:25,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:25,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724654011] [2020-04-17 22:57:25,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:25,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 22:57:25,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771156455] [2020-04-17 22:57:25,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 22:57:25,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:25,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 22:57:25,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 22:57:25,837 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-04-17 22:57:25,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:25,881 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-04-17 22:57:25,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:57:25,881 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 22:57:25,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:25,882 INFO L225 Difference]: With dead ends: 100 [2020-04-17 22:57:25,882 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 22:57:25,883 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:57:25,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 22:57:25,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-04-17 22:57:25,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-04-17 22:57:25,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-04-17 22:57:25,889 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-04-17 22:57:25,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:25,889 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-04-17 22:57:25,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 22:57:25,890 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-04-17 22:57:25,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:25,890 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:25,891 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:25,891 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:25,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:25,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1490550578, now seen corresponding path program 3 times [2020-04-17 22:57:25,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:25,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955061034] [2020-04-17 22:57:25,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:25,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955061034] [2020-04-17 22:57:25,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:25,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 22:57:25,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467678221] [2020-04-17 22:57:25,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 22:57:25,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:25,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 22:57:25,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 22:57:25,945 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-04-17 22:57:26,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:26,043 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-04-17 22:57:26,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:26,045 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 22:57:26,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:26,047 INFO L225 Difference]: With dead ends: 105 [2020-04-17 22:57:26,047 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 22:57:26,048 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:57:26,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 22:57:26,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-04-17 22:57:26,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 22:57:26,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-04-17 22:57:26,059 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-04-17 22:57:26,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:26,060 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-04-17 22:57:26,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 22:57:26,063 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-04-17 22:57:26,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:26,068 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:26,068 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:26,069 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:26,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:26,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-04-17 22:57:26,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:26,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941947815] [2020-04-17 22:57:26,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:26,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941947815] [2020-04-17 22:57:26,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:26,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 22:57:26,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884098433] [2020-04-17 22:57:26,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 22:57:26,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:26,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 22:57:26,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 22:57:26,144 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-04-17 22:57:26,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:26,228 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-04-17 22:57:26,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:26,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 22:57:26,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:26,230 INFO L225 Difference]: With dead ends: 105 [2020-04-17 22:57:26,230 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 22:57:26,231 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:57:26,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 22:57:26,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-04-17 22:57:26,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 22:57:26,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-04-17 22:57:26,238 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-04-17 22:57:26,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:26,239 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-04-17 22:57:26,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 22:57:26,239 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-04-17 22:57:26,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:26,241 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:26,241 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:26,241 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:26,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:26,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1483163371, now seen corresponding path program 3 times [2020-04-17 22:57:26,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:26,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778387199] [2020-04-17 22:57:26,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:26,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778387199] [2020-04-17 22:57:26,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850135015] [2020-04-17 22:57:26,360 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:26,422 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:26,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:26,424 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:26,429 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:26,501 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:26,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:26,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:26,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:57:26,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96841508] [2020-04-17 22:57:26,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:57:26,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:26,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:57:26,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:57:26,529 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-04-17 22:57:26,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:26,656 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-04-17 22:57:26,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:26,656 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-04-17 22:57:26,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:26,658 INFO L225 Difference]: With dead ends: 122 [2020-04-17 22:57:26,658 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 22:57:26,659 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:57:26,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 22:57:26,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-04-17 22:57:26,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-04-17 22:57:26,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-04-17 22:57:26,664 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-04-17 22:57:26,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:26,665 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-04-17 22:57:26,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:57:26,665 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-04-17 22:57:26,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:26,666 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:26,666 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:26,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:26,872 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:26,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:26,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-04-17 22:57:26,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:26,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539447014] [2020-04-17 22:57:26,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:26,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:26,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539447014] [2020-04-17 22:57:26,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891041190] [2020-04-17 22:57:26,965 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:27,022 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:27,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:27,023 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:27,024 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:27,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:27,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:27,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404522445] [2020-04-17 22:57:27,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:27,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:27,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:27,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:27,111 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-04-17 22:57:27,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:27,147 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-04-17 22:57:27,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:57:27,148 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 22:57:27,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:27,149 INFO L225 Difference]: With dead ends: 108 [2020-04-17 22:57:27,149 INFO L226 Difference]: Without dead ends: 105 [2020-04-17 22:57:27,150 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:27,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-04-17 22:57:27,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-04-17 22:57:27,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-04-17 22:57:27,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-04-17 22:57:27,154 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-04-17 22:57:27,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:27,155 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-04-17 22:57:27,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:27,155 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-04-17 22:57:27,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:27,155 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:27,156 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:27,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:27,360 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:27,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:27,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1043405416, now seen corresponding path program 7 times [2020-04-17 22:57:27,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:27,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646916634] [2020-04-17 22:57:27,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:27,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646916634] [2020-04-17 22:57:27,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081020974] [2020-04-17 22:57:27,439 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:27,489 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:27,491 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:27,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:27,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:27,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818334252] [2020-04-17 22:57:27,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:27,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:27,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:27,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:27,579 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-04-17 22:57:27,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:27,674 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-04-17 22:57:27,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:57:27,677 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 22:57:27,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:27,679 INFO L225 Difference]: With dead ends: 116 [2020-04-17 22:57:27,679 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 22:57:27,680 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:57:27,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 22:57:27,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-04-17 22:57:27,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 22:57:27,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-04-17 22:57:27,686 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-04-17 22:57:27,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:27,687 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-04-17 22:57:27,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:27,687 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-04-17 22:57:27,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:27,688 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:27,688 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:27,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:27,893 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:27,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:27,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1044097336, now seen corresponding path program 8 times [2020-04-17 22:57:27,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:27,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610221000] [2020-04-17 22:57:27,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:27,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:27,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610221000] [2020-04-17 22:57:27,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556311212] [2020-04-17 22:57:27,969 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:28,029 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:28,030 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:28,031 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:28,034 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:28,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:28,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:28,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:28,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899261547] [2020-04-17 22:57:28,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:28,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:28,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:28,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:28,137 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-04-17 22:57:28,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:28,246 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-04-17 22:57:28,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:28,246 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 22:57:28,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:28,247 INFO L225 Difference]: With dead ends: 115 [2020-04-17 22:57:28,248 INFO L226 Difference]: Without dead ends: 112 [2020-04-17 22:57:28,249 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:28,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-04-17 22:57:28,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-04-17 22:57:28,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 22:57:28,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-04-17 22:57:28,254 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-04-17 22:57:28,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:28,254 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-04-17 22:57:28,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:28,254 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-04-17 22:57:28,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:28,255 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:28,255 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:28,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:28,460 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:28,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:28,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1044119656, now seen corresponding path program 9 times [2020-04-17 22:57:28,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:28,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820717504] [2020-04-17 22:57:28,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:28,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:28,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820717504] [2020-04-17 22:57:28,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476314674] [2020-04-17 22:57:28,525 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:28,569 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:28,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:28,570 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:28,571 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:28,625 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:28,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:28,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:28,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707423261] [2020-04-17 22:57:28,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:28,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:28,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:28,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:28,635 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-04-17 22:57:28,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:28,739 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-04-17 22:57:28,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:28,739 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 22:57:28,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:28,741 INFO L225 Difference]: With dead ends: 124 [2020-04-17 22:57:28,741 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 22:57:28,741 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:57:28,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 22:57:28,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-04-17 22:57:28,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 22:57:28,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-04-17 22:57:28,746 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-04-17 22:57:28,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:28,746 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-04-17 22:57:28,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:28,746 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-04-17 22:57:28,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:28,747 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:28,747 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:28,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:28,955 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:28,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:28,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-04-17 22:57:28,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:28,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556751324] [2020-04-17 22:57:28,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:28,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:29,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556751324] [2020-04-17 22:57:29,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14523120] [2020-04-17 22:57:29,029 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:29,085 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:29,085 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:29,086 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:29,088 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:29,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:29,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:29,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:29,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161574489] [2020-04-17 22:57:29,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:29,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:29,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:29,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:29,176 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-04-17 22:57:29,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:29,228 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-04-17 22:57:29,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:57:29,229 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:29,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:29,230 INFO L225 Difference]: With dead ends: 113 [2020-04-17 22:57:29,231 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 22:57:29,231 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:29,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 22:57:29,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-04-17 22:57:29,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-04-17 22:57:29,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-04-17 22:57:29,237 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-04-17 22:57:29,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:29,238 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-04-17 22:57:29,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:29,238 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-04-17 22:57:29,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:29,239 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:29,239 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:29,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:29,443 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:29,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:29,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 6 times [2020-04-17 22:57:29,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:29,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916407795] [2020-04-17 22:57:29,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:29,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:29,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916407795] [2020-04-17 22:57:29,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642806549] [2020-04-17 22:57:29,529 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:29,609 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:29,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:29,610 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:29,611 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:29,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:29,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:29,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:29,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538051818] [2020-04-17 22:57:29,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:29,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:29,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:29,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:29,678 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-04-17 22:57:29,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:29,749 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-04-17 22:57:29,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:57:29,750 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:29,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:29,750 INFO L225 Difference]: With dead ends: 118 [2020-04-17 22:57:29,751 INFO L226 Difference]: Without dead ends: 116 [2020-04-17 22:57:29,751 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:29,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-17 22:57:29,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-04-17 22:57:29,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-04-17 22:57:29,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-04-17 22:57:29,755 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-04-17 22:57:29,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:29,755 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-04-17 22:57:29,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:29,756 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-04-17 22:57:29,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:29,756 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:29,756 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:29,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:29,960 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:29,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:29,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 7 times [2020-04-17 22:57:29,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:29,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66333375] [2020-04-17 22:57:29,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:30,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66333375] [2020-04-17 22:57:30,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274582893] [2020-04-17 22:57:30,062 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:30,112 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:30,113 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:30,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:30,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:30,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458624293] [2020-04-17 22:57:30,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:30,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:30,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:30,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:30,198 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-04-17 22:57:30,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:30,274 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-04-17 22:57:30,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:57:30,274 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:30,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:30,276 INFO L225 Difference]: With dead ends: 119 [2020-04-17 22:57:30,276 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 22:57:30,276 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:30,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 22:57:30,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-04-17 22:57:30,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 22:57:30,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-04-17 22:57:30,280 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-04-17 22:57:30,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:30,281 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-04-17 22:57:30,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:30,281 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-04-17 22:57:30,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:30,282 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:30,282 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:30,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:30,486 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:30,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:30,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 8 times [2020-04-17 22:57:30,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:30,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398591764] [2020-04-17 22:57:30,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:30,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:30,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398591764] [2020-04-17 22:57:30,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683500757] [2020-04-17 22:57:30,573 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:30,623 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:30,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:30,624 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:30,627 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:30,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:30,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:30,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:30,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619198322] [2020-04-17 22:57:30,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:30,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:30,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:30,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:30,740 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-04-17 22:57:30,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:30,801 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-04-17 22:57:30,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:57:30,801 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:30,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:30,802 INFO L225 Difference]: With dead ends: 122 [2020-04-17 22:57:30,802 INFO L226 Difference]: Without dead ends: 120 [2020-04-17 22:57:30,803 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:57:30,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-04-17 22:57:30,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-04-17 22:57:30,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-04-17 22:57:30,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-04-17 22:57:30,807 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-04-17 22:57:30,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:30,807 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-04-17 22:57:30,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:30,808 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-04-17 22:57:30,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:30,808 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:30,808 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:31,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:31,009 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:31,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:31,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 9 times [2020-04-17 22:57:31,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:31,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649353791] [2020-04-17 22:57:31,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:31,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649353791] [2020-04-17 22:57:31,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973244307] [2020-04-17 22:57:31,077 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:31,121 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:31,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:31,122 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:31,123 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:31,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:31,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:31,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410484787] [2020-04-17 22:57:31,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:31,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:31,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:31,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:31,215 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-04-17 22:57:31,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:31,320 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-04-17 22:57:31,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:31,321 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:31,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:31,322 INFO L225 Difference]: With dead ends: 123 [2020-04-17 22:57:31,322 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 22:57:31,323 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:57:31,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 22:57:31,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-04-17 22:57:31,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 22:57:31,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-04-17 22:57:31,330 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-04-17 22:57:31,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:31,330 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-04-17 22:57:31,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:31,331 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-04-17 22:57:31,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:31,331 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:31,332 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:31,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:31,533 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:31,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:31,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 10 times [2020-04-17 22:57:31,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:31,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578796979] [2020-04-17 22:57:31,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:31,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:31,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578796979] [2020-04-17 22:57:31,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391862411] [2020-04-17 22:57:31,612 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:31,689 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:31,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:31,690 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:31,691 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:31,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:31,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:31,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:31,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642597765] [2020-04-17 22:57:31,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:31,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:31,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:31,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:31,759 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-04-17 22:57:31,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:31,847 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-04-17 22:57:31,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:31,848 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:31,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:31,849 INFO L225 Difference]: With dead ends: 123 [2020-04-17 22:57:31,849 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 22:57:31,849 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:31,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 22:57:31,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-04-17 22:57:31,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-04-17 22:57:31,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-04-17 22:57:31,854 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-04-17 22:57:31,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:31,854 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-04-17 22:57:31,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:31,854 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-04-17 22:57:31,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:31,855 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:31,855 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:32,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:32,063 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:32,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:32,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1037565553, now seen corresponding path program 11 times [2020-04-17 22:57:32,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:32,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373815344] [2020-04-17 22:57:32,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:32,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373815344] [2020-04-17 22:57:32,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611285741] [2020-04-17 22:57:32,119 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:32,161 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:32,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:32,162 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:32,163 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:32,210 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:32,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:32,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:32,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046248781] [2020-04-17 22:57:32,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:32,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:32,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:32,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:32,227 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-04-17 22:57:32,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:32,400 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-04-17 22:57:32,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:32,401 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:32,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:32,402 INFO L225 Difference]: With dead ends: 133 [2020-04-17 22:57:32,402 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 22:57:32,402 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:57:32,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 22:57:32,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-04-17 22:57:32,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-04-17 22:57:32,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-04-17 22:57:32,407 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-04-17 22:57:32,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:32,407 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-04-17 22:57:32,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:32,407 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-04-17 22:57:32,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:32,408 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:32,408 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:32,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:32,609 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:32,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:32,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1037573024, now seen corresponding path program 12 times [2020-04-17 22:57:32,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:32,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494315199] [2020-04-17 22:57:32,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:32,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:32,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494315199] [2020-04-17 22:57:32,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365440736] [2020-04-17 22:57:32,685 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:32,731 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:32,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:32,732 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:32,733 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:32,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:32,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:32,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:32,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199519941] [2020-04-17 22:57:32,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:32,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:32,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:32,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:32,811 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-04-17 22:57:32,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:32,943 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-04-17 22:57:32,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:32,943 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:32,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:32,944 INFO L225 Difference]: With dead ends: 127 [2020-04-17 22:57:32,944 INFO L226 Difference]: Without dead ends: 125 [2020-04-17 22:57:32,944 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:57:32,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-17 22:57:32,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-04-17 22:57:32,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-04-17 22:57:32,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-04-17 22:57:32,950 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-04-17 22:57:32,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:32,950 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-04-17 22:57:32,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-04-17 22:57:32,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:32,951 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:32,951 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:33,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:33,155 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:33,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:33,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 13 times [2020-04-17 22:57:33,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:33,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998374938] [2020-04-17 22:57:33,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:33,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:33,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:33,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998374938] [2020-04-17 22:57:33,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675137718] [2020-04-17 22:57:33,215 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:33,257 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:33,258 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:33,321 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:33,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:33,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:33,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:33,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850737050] [2020-04-17 22:57:33,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:33,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:33,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:33,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:33,330 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-04-17 22:57:33,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:33,552 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-04-17 22:57:33,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:57:33,553 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:33,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:33,554 INFO L225 Difference]: With dead ends: 141 [2020-04-17 22:57:33,554 INFO L226 Difference]: Without dead ends: 136 [2020-04-17 22:57:33,555 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:57:33,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-04-17 22:57:33,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-04-17 22:57:33,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-04-17 22:57:33,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-04-17 22:57:33,560 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-04-17 22:57:33,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:33,560 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-04-17 22:57:33,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:33,560 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-04-17 22:57:33,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:33,561 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:33,561 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:33,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:33,764 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:33,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:33,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1037595344, now seen corresponding path program 14 times [2020-04-17 22:57:33,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:33,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358870130] [2020-04-17 22:57:33,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:33,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:33,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358870130] [2020-04-17 22:57:33,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856721628] [2020-04-17 22:57:33,817 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:33,867 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:33,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:33,868 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:33,869 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:33,912 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:33,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:33,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:33,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:33,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713089556] [2020-04-17 22:57:33,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:33,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:33,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:33,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:33,921 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-04-17 22:57:34,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:34,090 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-04-17 22:57:34,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:34,091 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:34,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:34,093 INFO L225 Difference]: With dead ends: 136 [2020-04-17 22:57:34,093 INFO L226 Difference]: Without dead ends: 131 [2020-04-17 22:57:34,093 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:57:34,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-04-17 22:57:34,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-04-17 22:57:34,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-17 22:57:34,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-04-17 22:57:34,097 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-04-17 22:57:34,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:34,098 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-04-17 22:57:34,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:34,098 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-04-17 22:57:34,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:34,098 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:34,099 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:34,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:34,309 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:34,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:34,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1037803664, now seen corresponding path program 15 times [2020-04-17 22:57:34,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:34,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495760699] [2020-04-17 22:57:34,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:34,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:34,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495760699] [2020-04-17 22:57:34,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017973785] [2020-04-17 22:57:34,387 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:34,442 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:34,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:34,443 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:34,447 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:34,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:34,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:34,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765107784] [2020-04-17 22:57:34,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:34,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:34,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:34,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:34,508 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-04-17 22:57:34,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:34,617 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-04-17 22:57:34,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:34,619 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:34,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:34,620 INFO L225 Difference]: With dead ends: 130 [2020-04-17 22:57:34,620 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 22:57:34,620 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:57:34,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 22:57:34,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-04-17 22:57:34,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 22:57:34,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-04-17 22:57:34,625 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-04-17 22:57:34,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:34,625 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-04-17 22:57:34,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:34,625 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-04-17 22:57:34,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:34,626 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:34,626 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:34,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:34,829 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:34,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:34,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 16 times [2020-04-17 22:57:34,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:34,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770041416] [2020-04-17 22:57:34,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:34,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770041416] [2020-04-17 22:57:34,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538678581] [2020-04-17 22:57:34,886 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:34,930 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:34,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:34,931 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:34,932 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:34,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:34,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:34,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:35,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104364551] [2020-04-17 22:57:35,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:35,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:35,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:35,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:35,001 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-04-17 22:57:35,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:35,148 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-04-17 22:57:35,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:57:35,148 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:35,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:35,149 INFO L225 Difference]: With dead ends: 131 [2020-04-17 22:57:35,150 INFO L226 Difference]: Without dead ends: 129 [2020-04-17 22:57:35,150 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:57:35,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-04-17 22:57:35,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-04-17 22:57:35,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-17 22:57:35,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-04-17 22:57:35,154 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-04-17 22:57:35,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:35,154 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-04-17 22:57:35,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:35,154 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-04-17 22:57:35,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:35,155 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:35,155 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:35,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:35,356 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:35,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:35,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 17 times [2020-04-17 22:57:35,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:35,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560018721] [2020-04-17 22:57:35,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:35,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560018721] [2020-04-17 22:57:35,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463351658] [2020-04-17 22:57:35,409 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:35,452 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:35,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:35,453 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:35,454 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:35,511 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:35,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:35,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:35,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:35,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51188410] [2020-04-17 22:57:35,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:35,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:35,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:35,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:35,521 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-04-17 22:57:35,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:35,667 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-04-17 22:57:35,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:35,668 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:35,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:35,669 INFO L225 Difference]: With dead ends: 131 [2020-04-17 22:57:35,669 INFO L226 Difference]: Without dead ends: 126 [2020-04-17 22:57:35,669 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:57:35,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-04-17 22:57:35,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-04-17 22:57:35,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-17 22:57:35,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-04-17 22:57:35,672 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-04-17 22:57:35,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:35,673 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-04-17 22:57:35,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:35,673 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-04-17 22:57:35,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:35,673 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:35,673 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:35,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:35,874 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:35,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:35,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1038489074, now seen corresponding path program 18 times [2020-04-17 22:57:35,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:35,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545304968] [2020-04-17 22:57:35,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:35,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:35,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545304968] [2020-04-17 22:57:35,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123171207] [2020-04-17 22:57:35,919 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:35,967 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:35,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:35,968 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:35,969 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:36,031 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:36,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:36,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:36,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826760114] [2020-04-17 22:57:36,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:36,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:36,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:36,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:36,039 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-04-17 22:57:36,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:36,259 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-04-17 22:57:36,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:57:36,259 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:36,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:36,261 INFO L225 Difference]: With dead ends: 145 [2020-04-17 22:57:36,261 INFO L226 Difference]: Without dead ends: 140 [2020-04-17 22:57:36,262 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:57:36,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-04-17 22:57:36,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-04-17 22:57:36,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 22:57:36,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-04-17 22:57:36,267 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-04-17 22:57:36,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:36,267 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-04-17 22:57:36,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:36,267 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-04-17 22:57:36,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:36,268 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:36,268 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:36,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:36,471 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:36,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:36,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1038517904, now seen corresponding path program 19 times [2020-04-17 22:57:36,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:36,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900564760] [2020-04-17 22:57:36,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:36,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:36,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900564760] [2020-04-17 22:57:36,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186499192] [2020-04-17 22:57:36,534 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:36,582 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:36,584 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:36,657 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:36,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:36,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:36,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038445387] [2020-04-17 22:57:36,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:36,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:36,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:36,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:36,667 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-04-17 22:57:36,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:36,865 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-04-17 22:57:36,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:36,865 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:36,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:36,866 INFO L225 Difference]: With dead ends: 135 [2020-04-17 22:57:36,867 INFO L226 Difference]: Without dead ends: 130 [2020-04-17 22:57:36,867 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:57:36,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-04-17 22:57:36,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-04-17 22:57:36,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 22:57:36,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-04-17 22:57:36,871 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-04-17 22:57:36,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:36,871 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-04-17 22:57:36,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:36,872 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-04-17 22:57:36,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:36,872 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:36,872 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:37,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:37,076 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:37,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:37,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1266597800, now seen corresponding path program 4 times [2020-04-17 22:57:37,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:37,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714902422] [2020-04-17 22:57:37,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:37,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:37,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714902422] [2020-04-17 22:57:37,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605489794] [2020-04-17 22:57:37,217 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:37,260 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:37,261 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:37,261 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:37,264 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:37,336 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:37,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:37,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-04-17 22:57:37,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159920205] [2020-04-17 22:57:37,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 22:57:37,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:37,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 22:57:37,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:57:37,356 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-04-17 22:57:37,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:37,509 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-04-17 22:57:37,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:37,509 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-04-17 22:57:37,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:37,511 INFO L225 Difference]: With dead ends: 143 [2020-04-17 22:57:37,511 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 22:57:37,511 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-04-17 22:57:37,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 22:57:37,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-04-17 22:57:37,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-04-17 22:57:37,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-04-17 22:57:37,516 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-04-17 22:57:37,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:37,516 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-04-17 22:57:37,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 22:57:37,516 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-04-17 22:57:37,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:37,517 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:37,517 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:37,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:37,721 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:37,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:37,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 10 times [2020-04-17 22:57:37,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:37,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346084476] [2020-04-17 22:57:37,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:37,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346084476] [2020-04-17 22:57:37,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853913831] [2020-04-17 22:57:37,843 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:37,887 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:37,887 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:37,888 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:37,889 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:37,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:37,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:37,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744641357] [2020-04-17 22:57:37,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:37,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:37,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:37,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:37,980 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-04-17 22:57:38,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:38,019 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-04-17 22:57:38,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:57:38,019 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 22:57:38,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:38,020 INFO L225 Difference]: With dead ends: 132 [2020-04-17 22:57:38,020 INFO L226 Difference]: Without dead ends: 129 [2020-04-17 22:57:38,021 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:38,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-04-17 22:57:38,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-04-17 22:57:38,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-04-17 22:57:38,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-04-17 22:57:38,024 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-04-17 22:57:38,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:38,025 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-04-17 22:57:38,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:38,025 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-04-17 22:57:38,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:38,025 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:38,025 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:38,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:38,229 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:38,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:38,230 INFO L82 PathProgramCache]: Analyzing trace with hash -2014169786, now seen corresponding path program 11 times [2020-04-17 22:57:38,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:38,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950676883] [2020-04-17 22:57:38,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:38,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950676883] [2020-04-17 22:57:38,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914345549] [2020-04-17 22:57:38,316 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:38,363 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:57:38,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:38,364 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:38,365 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:38,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:38,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:38,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025836621] [2020-04-17 22:57:38,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:38,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:38,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:38,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:38,449 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-04-17 22:57:38,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:38,518 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-04-17 22:57:38,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:38,519 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 22:57:38,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:38,520 INFO L225 Difference]: With dead ends: 143 [2020-04-17 22:57:38,520 INFO L226 Difference]: Without dead ends: 140 [2020-04-17 22:57:38,521 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:57:38,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-04-17 22:57:38,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-04-17 22:57:38,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-04-17 22:57:38,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-04-17 22:57:38,525 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-04-17 22:57:38,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:38,525 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-04-17 22:57:38,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:38,525 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-04-17 22:57:38,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:38,526 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:38,526 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:38,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:38,729 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:38,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:38,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1992720266, now seen corresponding path program 12 times [2020-04-17 22:57:38,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:38,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580048656] [2020-04-17 22:57:38,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:38,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:38,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580048656] [2020-04-17 22:57:38,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417686872] [2020-04-17 22:57:38,809 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:38,865 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:57:38,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:38,866 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:38,867 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:38,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:38,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:38,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734800869] [2020-04-17 22:57:38,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:38,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:38,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:38,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:38,991 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-04-17 22:57:39,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:39,086 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-04-17 22:57:39,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:39,087 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 22:57:39,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:39,089 INFO L225 Difference]: With dead ends: 142 [2020-04-17 22:57:39,089 INFO L226 Difference]: Without dead ends: 139 [2020-04-17 22:57:39,089 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:57:39,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-04-17 22:57:39,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-04-17 22:57:39,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-04-17 22:57:39,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-04-17 22:57:39,095 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-04-17 22:57:39,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:39,096 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-04-17 22:57:39,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:39,096 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-04-17 22:57:39,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:39,097 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:39,097 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:39,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:39,302 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:39,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:39,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1992028346, now seen corresponding path program 13 times [2020-04-17 22:57:39,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:39,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650518782] [2020-04-17 22:57:39,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:39,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:39,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650518782] [2020-04-17 22:57:39,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406620016] [2020-04-17 22:57:39,372 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:39,419 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:39,420 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:39,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:39,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:39,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:39,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838333991] [2020-04-17 22:57:39,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:39,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:39,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:39,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:39,508 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-04-17 22:57:39,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:39,613 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-04-17 22:57:39,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:39,613 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 22:57:39,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:39,614 INFO L225 Difference]: With dead ends: 141 [2020-04-17 22:57:39,614 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 22:57:39,615 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:57:39,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 22:57:39,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-04-17 22:57:39,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-04-17 22:57:39,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-04-17 22:57:39,618 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-04-17 22:57:39,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:39,618 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-04-17 22:57:39,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:39,618 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-04-17 22:57:39,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:39,618 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:39,618 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:39,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:39,819 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:39,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:39,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1992006026, now seen corresponding path program 14 times [2020-04-17 22:57:39,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:39,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478000239] [2020-04-17 22:57:39,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:39,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:39,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478000239] [2020-04-17 22:57:39,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608301098] [2020-04-17 22:57:39,878 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:39,931 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:39,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:39,931 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:39,932 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:40,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:40,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:40,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:40,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716344763] [2020-04-17 22:57:40,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:40,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:40,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:40,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:40,029 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-04-17 22:57:40,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:40,179 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-04-17 22:57:40,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:40,179 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 22:57:40,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:40,181 INFO L225 Difference]: With dead ends: 150 [2020-04-17 22:57:40,181 INFO L226 Difference]: Without dead ends: 144 [2020-04-17 22:57:40,182 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:57:40,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-04-17 22:57:40,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-04-17 22:57:40,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-04-17 22:57:40,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-04-17 22:57:40,186 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-04-17 22:57:40,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:40,186 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-04-17 22:57:40,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:40,186 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-04-17 22:57:40,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:40,187 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:40,187 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:40,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:40,391 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:40,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:40,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 20 times [2020-04-17 22:57:40,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:40,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688906928] [2020-04-17 22:57:40,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:40,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688906928] [2020-04-17 22:57:40,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590087420] [2020-04-17 22:57:40,476 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:40,518 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:40,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:40,519 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:40,520 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:40,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:40,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:40,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986745910] [2020-04-17 22:57:40,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:40,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:40,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:40,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:40,613 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-04-17 22:57:40,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:40,662 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-04-17 22:57:40,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:57:40,662 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:40,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:40,663 INFO L225 Difference]: With dead ends: 138 [2020-04-17 22:57:40,663 INFO L226 Difference]: Without dead ends: 136 [2020-04-17 22:57:40,664 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:40,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-04-17 22:57:40,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-04-17 22:57:40,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-04-17 22:57:40,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-04-17 22:57:40,667 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-04-17 22:57:40,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:40,668 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-04-17 22:57:40,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:40,668 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-04-17 22:57:40,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:40,669 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:40,669 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:40,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:40,872 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:40,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:40,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 21 times [2020-04-17 22:57:40,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:40,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349369886] [2020-04-17 22:57:40,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:40,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:40,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349369886] [2020-04-17 22:57:40,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654349614] [2020-04-17 22:57:40,942 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:40,980 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:40,981 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:40,982 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:40,983 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:41,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:41,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:41,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:41,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727977451] [2020-04-17 22:57:41,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:41,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:41,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:41,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:41,083 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-04-17 22:57:41,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:41,187 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-04-17 22:57:41,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:41,188 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:41,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:41,188 INFO L225 Difference]: With dead ends: 145 [2020-04-17 22:57:41,189 INFO L226 Difference]: Without dead ends: 143 [2020-04-17 22:57:41,189 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:57:41,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-04-17 22:57:41,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-04-17 22:57:41,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-04-17 22:57:41,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-04-17 22:57:41,192 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-04-17 22:57:41,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:41,192 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-04-17 22:57:41,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:41,192 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-04-17 22:57:41,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:41,193 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:41,193 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:41,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:41,397 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:41,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:41,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 22 times [2020-04-17 22:57:41,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:41,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006623598] [2020-04-17 22:57:41,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:41,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:41,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006623598] [2020-04-17 22:57:41,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485603708] [2020-04-17 22:57:41,465 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:41,505 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:41,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:41,506 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:41,506 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:41,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:41,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:41,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354833507] [2020-04-17 22:57:41,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:41,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:41,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:41,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:41,587 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-04-17 22:57:41,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:41,720 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-04-17 22:57:41,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:41,721 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:41,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:41,722 INFO L225 Difference]: With dead ends: 150 [2020-04-17 22:57:41,722 INFO L226 Difference]: Without dead ends: 148 [2020-04-17 22:57:41,723 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:57:41,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-04-17 22:57:41,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-04-17 22:57:41,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-04-17 22:57:41,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-04-17 22:57:41,726 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-04-17 22:57:41,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:41,726 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-04-17 22:57:41,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:41,726 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-04-17 22:57:41,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:41,727 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:41,727 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:41,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:41,931 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:41,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:41,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 23 times [2020-04-17 22:57:41,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:41,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625692952] [2020-04-17 22:57:41,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:41,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:42,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625692952] [2020-04-17 22:57:42,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074689061] [2020-04-17 22:57:42,000 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:42,049 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:57:42,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:42,050 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:42,053 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:42,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:42,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:42,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344249412] [2020-04-17 22:57:42,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:42,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:42,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:42,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:42,159 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-04-17 22:57:42,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:42,348 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-04-17 22:57:42,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:42,349 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:42,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:42,350 INFO L225 Difference]: With dead ends: 148 [2020-04-17 22:57:42,350 INFO L226 Difference]: Without dead ends: 146 [2020-04-17 22:57:42,351 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:57:42,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-04-17 22:57:42,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-04-17 22:57:42,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 22:57:42,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-04-17 22:57:42,355 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-04-17 22:57:42,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:42,355 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-04-17 22:57:42,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:42,357 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-04-17 22:57:42,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:42,357 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:42,357 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:42,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:42,561 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:42,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:42,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1442208078, now seen corresponding path program 24 times [2020-04-17 22:57:42,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:42,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072748461] [2020-04-17 22:57:42,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:42,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:42,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072748461] [2020-04-17 22:57:42,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695108737] [2020-04-17 22:57:42,637 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:42,684 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:42,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:42,685 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:42,686 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:42,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:42,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:42,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:42,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242817971] [2020-04-17 22:57:42,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:42,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:42,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:42,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:42,776 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-04-17 22:57:42,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:42,887 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-04-17 22:57:42,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:42,887 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:42,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:42,888 INFO L225 Difference]: With dead ends: 149 [2020-04-17 22:57:42,888 INFO L226 Difference]: Without dead ends: 147 [2020-04-17 22:57:42,889 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:57:42,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-04-17 22:57:42,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-04-17 22:57:42,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 22:57:42,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-04-17 22:57:42,892 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-04-17 22:57:42,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:42,894 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-04-17 22:57:42,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:42,894 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-04-17 22:57:42,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:42,895 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:42,895 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:43,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:43,098 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:43,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:43,099 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 25 times [2020-04-17 22:57:43,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:43,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624295787] [2020-04-17 22:57:43,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:43,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624295787] [2020-04-17 22:57:43,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334728775] [2020-04-17 22:57:43,186 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:43,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:43,228 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:43,228 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:43,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:43,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:43,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:43,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520918690] [2020-04-17 22:57:43,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:43,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:43,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:43,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:43,330 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-04-17 22:57:43,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:43,390 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-04-17 22:57:43,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:43,391 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:43,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:43,391 INFO L225 Difference]: With dead ends: 152 [2020-04-17 22:57:43,392 INFO L226 Difference]: Without dead ends: 150 [2020-04-17 22:57:43,392 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:57:43,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-04-17 22:57:43,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-04-17 22:57:43,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-17 22:57:43,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-04-17 22:57:43,396 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-04-17 22:57:43,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:43,396 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-04-17 22:57:43,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:43,396 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-04-17 22:57:43,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:43,397 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:43,397 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:43,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:43,600 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:43,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:43,601 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 26 times [2020-04-17 22:57:43,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:43,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154965513] [2020-04-17 22:57:43,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:43,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154965513] [2020-04-17 22:57:43,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653168850] [2020-04-17 22:57:43,674 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:43,720 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:43,720 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:43,721 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:43,722 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:43,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:43,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:43,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727347797] [2020-04-17 22:57:43,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:43,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:43,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:43,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:43,814 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-04-17 22:57:43,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:43,944 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-04-17 22:57:43,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:57:43,945 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:43,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:43,946 INFO L225 Difference]: With dead ends: 153 [2020-04-17 22:57:43,947 INFO L226 Difference]: Without dead ends: 151 [2020-04-17 22:57:43,947 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:57:43,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-04-17 22:57:43,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-04-17 22:57:43,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 22:57:43,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-04-17 22:57:43,952 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-04-17 22:57:43,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:43,952 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-04-17 22:57:43,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:43,952 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-04-17 22:57:43,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:43,953 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:43,953 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:44,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:44,156 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:44,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:44,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 27 times [2020-04-17 22:57:44,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:44,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130181485] [2020-04-17 22:57:44,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:44,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:44,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:44,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130181485] [2020-04-17 22:57:44,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267044233] [2020-04-17 22:57:44,234 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:44,275 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:44,275 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:44,276 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:44,276 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:44,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:44,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:44,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:44,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086939198] [2020-04-17 22:57:44,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:44,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:44,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:44,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:44,357 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-04-17 22:57:44,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:44,514 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-04-17 22:57:44,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:57:44,515 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:44,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:44,516 INFO L225 Difference]: With dead ends: 156 [2020-04-17 22:57:44,516 INFO L226 Difference]: Without dead ends: 154 [2020-04-17 22:57:44,517 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:57:44,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-04-17 22:57:44,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-04-17 22:57:44,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-04-17 22:57:44,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-04-17 22:57:44,541 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-04-17 22:57:44,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:44,541 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-04-17 22:57:44,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:44,541 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-04-17 22:57:44,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:44,541 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:44,541 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:44,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:44,742 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:44,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:44,743 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 28 times [2020-04-17 22:57:44,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:44,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190059224] [2020-04-17 22:57:44,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:44,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190059224] [2020-04-17 22:57:44,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284896464] [2020-04-17 22:57:44,825 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:44,868 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:44,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:44,869 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:44,869 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:44,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:44,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:44,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312034863] [2020-04-17 22:57:44,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:44,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:44,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:44,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:44,959 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-04-17 22:57:45,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:45,052 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-04-17 22:57:45,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:45,052 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:45,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:45,054 INFO L225 Difference]: With dead ends: 148 [2020-04-17 22:57:45,054 INFO L226 Difference]: Without dead ends: 146 [2020-04-17 22:57:45,055 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:57:45,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-04-17 22:57:45,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-04-17 22:57:45,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 22:57:45,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-04-17 22:57:45,059 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-04-17 22:57:45,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:45,059 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-04-17 22:57:45,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:45,059 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-04-17 22:57:45,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:45,060 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:45,060 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:45,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:45,263 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:45,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:45,264 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 29 times [2020-04-17 22:57:45,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:45,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758310214] [2020-04-17 22:57:45,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:45,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758310214] [2020-04-17 22:57:45,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402646998] [2020-04-17 22:57:45,332 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:45,375 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:45,375 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:45,376 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:45,377 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:45,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:45,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:45,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392608990] [2020-04-17 22:57:45,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:45,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:45,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:45,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:45,469 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-04-17 22:57:45,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:45,601 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-04-17 22:57:45,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:45,601 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:45,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:45,603 INFO L225 Difference]: With dead ends: 157 [2020-04-17 22:57:45,603 INFO L226 Difference]: Without dead ends: 155 [2020-04-17 22:57:45,604 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:57:45,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-04-17 22:57:45,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-04-17 22:57:45,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 22:57:45,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-04-17 22:57:45,607 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-04-17 22:57:45,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:45,607 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-04-17 22:57:45,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:45,607 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-04-17 22:57:45,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:45,608 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:45,608 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:45,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:45,811 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:45,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:45,812 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 30 times [2020-04-17 22:57:45,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:45,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611478193] [2020-04-17 22:57:45,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:45,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:45,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:45,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611478193] [2020-04-17 22:57:45,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854473808] [2020-04-17 22:57:45,890 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:45,932 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:45,932 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:45,932 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:57:45,933 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:45,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:45,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 22:57:45,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858843245] [2020-04-17 22:57:45,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:57:45,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:45,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:57:45,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:57:45,956 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 9 states. [2020-04-17 22:57:46,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:46,059 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-04-17 22:57:46,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:46,060 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 22:57:46,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:46,061 INFO L225 Difference]: With dead ends: 149 [2020-04-17 22:57:46,061 INFO L226 Difference]: Without dead ends: 147 [2020-04-17 22:57:46,061 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:57:46,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-04-17 22:57:46,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-04-17 22:57:46,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-04-17 22:57:46,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-04-17 22:57:46,067 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-04-17 22:57:46,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:46,067 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-04-17 22:57:46,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:57:46,068 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-04-17 22:57:46,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:46,068 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:46,068 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:46,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:46,269 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:46,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:46,269 INFO L82 PathProgramCache]: Analyzing trace with hash 2099754286, now seen corresponding path program 31 times [2020-04-17 22:57:46,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:46,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977046584] [2020-04-17 22:57:46,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:46,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977046584] [2020-04-17 22:57:46,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351441589] [2020-04-17 22:57:46,332 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:46,384 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:46,385 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:46,461 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:46,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:46,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:46,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478771695] [2020-04-17 22:57:46,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:46,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:46,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:46,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:46,478 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-04-17 22:57:46,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:46,703 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-04-17 22:57:46,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:46,704 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:46,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:46,705 INFO L225 Difference]: With dead ends: 164 [2020-04-17 22:57:46,705 INFO L226 Difference]: Without dead ends: 159 [2020-04-17 22:57:46,706 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:57:46,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-04-17 22:57:46,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-04-17 22:57:46,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-17 22:57:46,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-04-17 22:57:46,710 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-04-17 22:57:46,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:46,710 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-04-17 22:57:46,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:46,710 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-04-17 22:57:46,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:46,711 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:46,711 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:46,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:46,914 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:46,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:46,915 INFO L82 PathProgramCache]: Analyzing trace with hash 2099761757, now seen corresponding path program 32 times [2020-04-17 22:57:46,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:46,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300018822] [2020-04-17 22:57:46,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:46,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300018822] [2020-04-17 22:57:46,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566824673] [2020-04-17 22:57:46,973 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:47,030 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:47,030 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:47,031 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:47,032 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:47,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:47,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:47,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974254198] [2020-04-17 22:57:47,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:47,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:47,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:47,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:47,140 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-04-17 22:57:47,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:47,320 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-04-17 22:57:47,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:57:47,320 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:47,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:47,322 INFO L225 Difference]: With dead ends: 156 [2020-04-17 22:57:47,323 INFO L226 Difference]: Without dead ends: 154 [2020-04-17 22:57:47,323 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-04-17 22:57:47,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-04-17 22:57:47,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-04-17 22:57:47,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-04-17 22:57:47,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-04-17 22:57:47,326 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-04-17 22:57:47,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:47,327 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-04-17 22:57:47,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:47,327 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-04-17 22:57:47,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:47,328 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:47,328 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:47,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:47,528 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:47,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:47,529 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 33 times [2020-04-17 22:57:47,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:47,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984181261] [2020-04-17 22:57:47,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:47,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984181261] [2020-04-17 22:57:47,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845509847] [2020-04-17 22:57:47,588 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:47,631 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:47,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:47,631 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:47,632 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:47,710 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:47,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:47,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:47,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:47,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676978132] [2020-04-17 22:57:47,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:47,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:47,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:47,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:47,731 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-04-17 22:57:48,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:48,100 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-04-17 22:57:48,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 22:57:48,100 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:48,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:48,102 INFO L225 Difference]: With dead ends: 176 [2020-04-17 22:57:48,102 INFO L226 Difference]: Without dead ends: 171 [2020-04-17 22:57:48,102 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:57:48,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-04-17 22:57:48,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-04-17 22:57:48,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-04-17 22:57:48,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-04-17 22:57:48,107 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-04-17 22:57:48,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:48,108 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-04-17 22:57:48,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:48,108 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-04-17 22:57:48,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:48,108 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:48,109 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:48,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:48,312 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:48,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:48,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2099784077, now seen corresponding path program 34 times [2020-04-17 22:57:48,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:48,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183983720] [2020-04-17 22:57:48,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:48,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:48,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:48,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183983720] [2020-04-17 22:57:48,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324303110] [2020-04-17 22:57:48,380 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:48,426 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:48,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:48,427 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:48,428 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:48,497 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:48,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:48,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:48,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:48,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135414102] [2020-04-17 22:57:48,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:48,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:48,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:48,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:48,523 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-04-17 22:57:48,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:48,750 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-04-17 22:57:48,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:48,751 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:48,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:48,752 INFO L225 Difference]: With dead ends: 166 [2020-04-17 22:57:48,752 INFO L226 Difference]: Without dead ends: 161 [2020-04-17 22:57:48,753 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:57:48,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-04-17 22:57:48,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-04-17 22:57:48,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 22:57:48,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-04-17 22:57:48,756 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-04-17 22:57:48,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:48,757 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-04-17 22:57:48,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:48,757 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-04-17 22:57:48,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:48,758 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:48,758 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:48,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:48,962 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:48,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:48,962 INFO L82 PathProgramCache]: Analyzing trace with hash 2099992397, now seen corresponding path program 35 times [2020-04-17 22:57:48,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:48,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218508447] [2020-04-17 22:57:48,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:49,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218508447] [2020-04-17 22:57:49,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458669968] [2020-04-17 22:57:49,032 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:49,080 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:49,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:49,081 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:49,082 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:49,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:49,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:49,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:49,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606485786] [2020-04-17 22:57:49,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:49,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:49,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:49,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:49,167 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-04-17 22:57:49,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:49,345 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-04-17 22:57:49,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:49,345 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:49,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:49,346 INFO L225 Difference]: With dead ends: 163 [2020-04-17 22:57:49,347 INFO L226 Difference]: Without dead ends: 161 [2020-04-17 22:57:49,347 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-17 22:57:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-04-17 22:57:49,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-04-17 22:57:49,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-04-17 22:57:49,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-04-17 22:57:49,351 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-04-17 22:57:49,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:49,352 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-04-17 22:57:49,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:49,352 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-04-17 22:57:49,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:49,353 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:49,353 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:49,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:49,554 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:49,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:49,554 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 36 times [2020-04-17 22:57:49,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:49,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487015829] [2020-04-17 22:57:49,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:49,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487015829] [2020-04-17 22:57:49,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432814693] [2020-04-17 22:57:49,635 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:49,678 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:49,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:49,679 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:49,680 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:49,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:49,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:49,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:49,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983265288] [2020-04-17 22:57:49,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:49,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:49,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:49,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:49,755 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-04-17 22:57:49,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:49,983 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-04-17 22:57:49,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:57:49,983 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:49,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:49,985 INFO L225 Difference]: With dead ends: 170 [2020-04-17 22:57:49,985 INFO L226 Difference]: Without dead ends: 168 [2020-04-17 22:57:49,985 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:57:49,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-04-17 22:57:49,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-04-17 22:57:49,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-04-17 22:57:49,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-04-17 22:57:49,988 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-04-17 22:57:49,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:49,989 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-04-17 22:57:49,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:49,989 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-04-17 22:57:49,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:49,990 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:49,990 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:50,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:50,193 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:50,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:50,193 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 37 times [2020-04-17 22:57:50,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:50,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847087352] [2020-04-17 22:57:50,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:50,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:50,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847087352] [2020-04-17 22:57:50,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139098066] [2020-04-17 22:57:50,260 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:50,300 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:50,301 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:50,352 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:50,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:50,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:50,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:50,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234490979] [2020-04-17 22:57:50,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:50,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:50,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:50,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:50,384 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-04-17 22:57:50,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:50,656 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-04-17 22:57:50,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:57:50,657 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:50,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:50,658 INFO L225 Difference]: With dead ends: 177 [2020-04-17 22:57:50,658 INFO L226 Difference]: Without dead ends: 172 [2020-04-17 22:57:50,658 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-04-17 22:57:50,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-04-17 22:57:50,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-04-17 22:57:50,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-04-17 22:57:50,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-04-17 22:57:50,662 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-04-17 22:57:50,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:50,663 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-04-17 22:57:50,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:50,663 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-04-17 22:57:50,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:50,664 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:50,664 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:50,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:50,867 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:50,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:50,868 INFO L82 PathProgramCache]: Analyzing trace with hash 2100677807, now seen corresponding path program 38 times [2020-04-17 22:57:50,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:50,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356116991] [2020-04-17 22:57:50,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:50,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:50,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356116991] [2020-04-17 22:57:50,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170747247] [2020-04-17 22:57:50,937 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:50,992 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:50,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:50,992 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:50,993 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:51,046 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:51,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:51,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:51,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41738604] [2020-04-17 22:57:51,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:51,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:51,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:51,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:51,053 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-04-17 22:57:51,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:51,419 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-04-17 22:57:51,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:57:51,420 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:51,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:51,421 INFO L225 Difference]: With dead ends: 190 [2020-04-17 22:57:51,421 INFO L226 Difference]: Without dead ends: 182 [2020-04-17 22:57:51,422 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-04-17 22:57:51,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-04-17 22:57:51,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-04-17 22:57:51,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 22:57:51,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-04-17 22:57:51,426 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-04-17 22:57:51,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:51,426 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-04-17 22:57:51,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:51,426 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-04-17 22:57:51,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:51,426 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:51,427 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:51,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:51,627 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:51,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:51,628 INFO L82 PathProgramCache]: Analyzing trace with hash 2100706637, now seen corresponding path program 39 times [2020-04-17 22:57:51,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:51,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53359599] [2020-04-17 22:57:51,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:51,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53359599] [2020-04-17 22:57:51,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260104339] [2020-04-17 22:57:51,682 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:51,723 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:57:51,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:51,724 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:51,725 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:51,798 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:51,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:51,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:51,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:51,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077660055] [2020-04-17 22:57:51,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:51,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:51,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:51,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:51,811 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-04-17 22:57:52,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:52,134 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-04-17 22:57:52,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:57:52,135 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:52,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:52,137 INFO L225 Difference]: With dead ends: 180 [2020-04-17 22:57:52,137 INFO L226 Difference]: Without dead ends: 175 [2020-04-17 22:57:52,137 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:57:52,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-04-17 22:57:52,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-04-17 22:57:52,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 22:57:52,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-04-17 22:57:52,141 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-04-17 22:57:52,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:52,141 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-04-17 22:57:52,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:52,141 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-04-17 22:57:52,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:52,142 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:52,142 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:52,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:52,345 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:52,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:52,345 INFO L82 PathProgramCache]: Analyzing trace with hash 2107142237, now seen corresponding path program 40 times [2020-04-17 22:57:52,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:52,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661813294] [2020-04-17 22:57:52,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:52,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:52,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661813294] [2020-04-17 22:57:52,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326944246] [2020-04-17 22:57:52,412 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:52,465 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:52,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:52,466 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:52,467 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:52,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:52,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:52,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81771615] [2020-04-17 22:57:52,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:52,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:52,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:52,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:52,586 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-04-17 22:57:52,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:52,763 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-04-17 22:57:52,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:52,764 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:52,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:52,766 INFO L225 Difference]: With dead ends: 164 [2020-04-17 22:57:52,766 INFO L226 Difference]: Without dead ends: 162 [2020-04-17 22:57:52,766 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:57:52,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-04-17 22:57:52,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-04-17 22:57:52,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 22:57:52,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-04-17 22:57:52,779 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-04-17 22:57:52,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:52,779 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-04-17 22:57:52,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:52,779 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-04-17 22:57:52,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:52,780 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:52,781 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:52,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:52,984 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:52,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:52,985 INFO L82 PathProgramCache]: Analyzing trace with hash 2107143198, now seen corresponding path program 41 times [2020-04-17 22:57:52,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:52,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938108750] [2020-04-17 22:57:52,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:53,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938108750] [2020-04-17 22:57:53,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602034550] [2020-04-17 22:57:53,049 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:53,102 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:53,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:53,103 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:53,104 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:53,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:53,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:53,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:53,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037191805] [2020-04-17 22:57:53,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:53,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:53,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:53,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:53,215 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-04-17 22:57:53,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:53,364 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-04-17 22:57:53,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:57:53,365 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:53,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:53,366 INFO L225 Difference]: With dead ends: 161 [2020-04-17 22:57:53,366 INFO L226 Difference]: Without dead ends: 159 [2020-04-17 22:57:53,367 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:57:53,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-04-17 22:57:53,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-04-17 22:57:53,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 22:57:53,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-04-17 22:57:53,370 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-04-17 22:57:53,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:53,370 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-04-17 22:57:53,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:53,371 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-04-17 22:57:53,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:53,371 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:53,371 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:53,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:53,574 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:53,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:53,575 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 42 times [2020-04-17 22:57:53,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:53,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323646779] [2020-04-17 22:57:53,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:53,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323646779] [2020-04-17 22:57:53,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260327775] [2020-04-17 22:57:53,634 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:53,688 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:57:53,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:53,690 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:53,690 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:53,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:53,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:53,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479810902] [2020-04-17 22:57:53,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:53,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:53,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:53,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:53,769 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-04-17 22:57:53,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:53,962 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-04-17 22:57:53,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:57:53,963 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:53,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:53,964 INFO L225 Difference]: With dead ends: 165 [2020-04-17 22:57:53,964 INFO L226 Difference]: Without dead ends: 163 [2020-04-17 22:57:53,965 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:57:53,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-04-17 22:57:53,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-04-17 22:57:53,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 22:57:53,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-04-17 22:57:53,968 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-04-17 22:57:53,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:53,969 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-04-17 22:57:53,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:53,969 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-04-17 22:57:53,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:53,969 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:53,969 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:54,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:54,173 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:54,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:54,173 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698988, now seen corresponding path program 43 times [2020-04-17 22:57:54,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:54,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977121041] [2020-04-17 22:57:54,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:54,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:54,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:54,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977121041] [2020-04-17 22:57:54,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990246554] [2020-04-17 22:57:54,229 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:54,274 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:54,274 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:54,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:54,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:54,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73357115] [2020-04-17 22:57:54,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:54,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:54,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:54,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:54,366 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-04-17 22:57:54,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:54,549 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-04-17 22:57:54,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:57:54,550 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:54,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:54,551 INFO L225 Difference]: With dead ends: 167 [2020-04-17 22:57:54,551 INFO L226 Difference]: Without dead ends: 165 [2020-04-17 22:57:54,551 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:57:54,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-04-17 22:57:54,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-04-17 22:57:54,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 22:57:54,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-04-17 22:57:54,555 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-04-17 22:57:54,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:54,556 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-04-17 22:57:54,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:54,556 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-04-17 22:57:54,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:54,556 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:54,557 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:54,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:54,760 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:54,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:54,760 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 44 times [2020-04-17 22:57:54,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:54,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134874822] [2020-04-17 22:57:54,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:54,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:54,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134874822] [2020-04-17 22:57:54,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906796431] [2020-04-17 22:57:54,817 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:54,872 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:54,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:54,874 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:54,875 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:55,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:55,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:55,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150680815] [2020-04-17 22:57:55,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:55,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:55,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:55,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:55,007 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-04-17 22:57:55,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:55,309 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-04-17 22:57:55,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 22:57:55,310 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:55,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:55,311 INFO L225 Difference]: With dead ends: 168 [2020-04-17 22:57:55,311 INFO L226 Difference]: Without dead ends: 166 [2020-04-17 22:57:55,311 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:57:55,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-04-17 22:57:55,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-04-17 22:57:55,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 22:57:55,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-04-17 22:57:55,314 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-04-17 22:57:55,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:55,315 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-04-17 22:57:55,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:55,315 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-04-17 22:57:55,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:55,315 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:55,316 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:55,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:55,519 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:55,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:55,520 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 45 times [2020-04-17 22:57:55,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:55,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590647068] [2020-04-17 22:57:55,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:55,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:55,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590647068] [2020-04-17 22:57:55,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059319227] [2020-04-17 22:57:55,573 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:55,626 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:55,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:55,627 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:55,628 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:55,690 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:55,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:55,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:55,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865900370] [2020-04-17 22:57:55,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:55,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:55,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:55,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:55,699 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-04-17 22:57:55,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:55,895 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-04-17 22:57:55,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:55,895 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:55,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:55,897 INFO L225 Difference]: With dead ends: 160 [2020-04-17 22:57:55,897 INFO L226 Difference]: Without dead ends: 155 [2020-04-17 22:57:55,897 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:57:55,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-04-17 22:57:55,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-04-17 22:57:55,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 22:57:55,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-04-17 22:57:55,900 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-04-17 22:57:55,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:55,901 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-04-17 22:57:55,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:55,901 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-04-17 22:57:55,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:55,901 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:55,902 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:56,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:56,102 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:56,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:56,103 INFO L82 PathProgramCache]: Analyzing trace with hash 2128383437, now seen corresponding path program 46 times [2020-04-17 22:57:56,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:56,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368040970] [2020-04-17 22:57:56,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:56,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:56,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368040970] [2020-04-17 22:57:56,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201841920] [2020-04-17 22:57:56,167 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:56,208 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:56,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:56,209 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:56,210 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:56,263 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:56,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:56,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:56,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173390651] [2020-04-17 22:57:56,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:56,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:56,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:56,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:56,276 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-04-17 22:57:56,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:56,620 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-04-17 22:57:56,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:57:56,621 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:56,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:56,622 INFO L225 Difference]: With dead ends: 189 [2020-04-17 22:57:56,623 INFO L226 Difference]: Without dead ends: 181 [2020-04-17 22:57:56,623 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:57:56,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-04-17 22:57:56,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-04-17 22:57:56,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 22:57:56,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-04-17 22:57:56,627 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-04-17 22:57:56,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:56,627 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-04-17 22:57:56,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:56,628 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-04-17 22:57:56,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:56,628 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:56,628 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:56,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:56,832 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:56,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:56,832 INFO L82 PathProgramCache]: Analyzing trace with hash 2128390908, now seen corresponding path program 47 times [2020-04-17 22:57:56,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:56,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054500304] [2020-04-17 22:57:56,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:56,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054500304] [2020-04-17 22:57:56,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846940054] [2020-04-17 22:57:56,895 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:56,962 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:56,962 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:56,963 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:56,963 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:57,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:57,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:57,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990863054] [2020-04-17 22:57:57,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:57,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:57,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:57,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:57,094 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-04-17 22:57:57,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:57,331 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-04-17 22:57:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 22:57:57,332 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:57,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:57,333 INFO L225 Difference]: With dead ends: 169 [2020-04-17 22:57:57,333 INFO L226 Difference]: Without dead ends: 167 [2020-04-17 22:57:57,334 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:57:57,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-04-17 22:57:57,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-04-17 22:57:57,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 22:57:57,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-04-17 22:57:57,338 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-04-17 22:57:57,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:57,338 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-04-17 22:57:57,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:57,338 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-04-17 22:57:57,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:57,339 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:57,339 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:57,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:57,542 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:57,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:57,542 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 48 times [2020-04-17 22:57:57,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:57,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130324454] [2020-04-17 22:57:57,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:57,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:57,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130324454] [2020-04-17 22:57:57,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993467169] [2020-04-17 22:57:57,603 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:57,643 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:57,643 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:57,644 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:57,644 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:57,704 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:57,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:57,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:57,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:57,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69672864] [2020-04-17 22:57:57,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:57,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:57,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:57,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:57,713 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-04-17 22:57:58,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:58,032 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-04-17 22:57:58,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:57:58,032 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:58,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:58,034 INFO L225 Difference]: With dead ends: 192 [2020-04-17 22:57:58,034 INFO L226 Difference]: Without dead ends: 184 [2020-04-17 22:57:58,034 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-04-17 22:57:58,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-04-17 22:57:58,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-04-17 22:57:58,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-04-17 22:57:58,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-04-17 22:57:58,037 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-04-17 22:57:58,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:58,037 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-04-17 22:57:58,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:58,037 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-04-17 22:57:58,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:58,038 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:58,038 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:58,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:58,239 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:58,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:58,239 INFO L82 PathProgramCache]: Analyzing trace with hash 2128413228, now seen corresponding path program 49 times [2020-04-17 22:57:58,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:58,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715990786] [2020-04-17 22:57:58,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:58,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:58,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715990786] [2020-04-17 22:57:58,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202676140] [2020-04-17 22:57:58,292 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:58,336 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:58,337 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:58,392 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:58,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:58,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:58,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:58,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419719435] [2020-04-17 22:57:58,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:58,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:58,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:58,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:58,401 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-04-17 22:57:58,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:58,709 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-04-17 22:57:58,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:57:58,709 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:58,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:58,711 INFO L225 Difference]: With dead ends: 180 [2020-04-17 22:57:58,711 INFO L226 Difference]: Without dead ends: 175 [2020-04-17 22:57:58,711 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-04-17 22:57:58,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-04-17 22:57:58,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-04-17 22:57:58,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-04-17 22:57:58,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-04-17 22:57:58,715 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-04-17 22:57:58,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:58,716 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-04-17 22:57:58,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:58,716 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-04-17 22:57:58,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:58,716 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:58,716 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:58,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:58,919 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:58,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:58,920 INFO L82 PathProgramCache]: Analyzing trace with hash 609848181, now seen corresponding path program 5 times [2020-04-17 22:57:58,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:58,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535543675] [2020-04-17 22:57:58,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:58,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:58,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535543675] [2020-04-17 22:57:58,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35722951] [2020-04-17 22:57:58,991 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:59,034 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:57:59,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:59,035 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:57:59,035 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:59,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:59,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:59,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:57:59,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105776155] [2020-04-17 22:57:59,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:57:59,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:59,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:57:59,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:57:59,149 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-04-17 22:57:59,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:59,342 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-04-17 22:57:59,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:57:59,342 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-04-17 22:57:59,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:59,344 INFO L225 Difference]: With dead ends: 164 [2020-04-17 22:57:59,344 INFO L226 Difference]: Without dead ends: 159 [2020-04-17 22:57:59,344 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:57:59,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-04-17 22:57:59,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-04-17 22:57:59,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-17 22:57:59,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-04-17 22:57:59,348 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-04-17 22:57:59,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:59,348 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-04-17 22:57:59,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:57:59,348 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-04-17 22:57:59,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:59,348 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:59,348 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:59,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:59,550 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:59,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:59,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 15 times [2020-04-17 22:57:59,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:59,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617184951] [2020-04-17 22:57:59,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:59,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:59,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617184951] [2020-04-17 22:57:59,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913373416] [2020-04-17 22:57:59,657 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:59,694 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:57:59,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:59,695 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:57:59,696 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:59,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:59,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:57:59,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684523732] [2020-04-17 22:57:59,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:57:59,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:59,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:57:59,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:57:59,814 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-04-17 22:57:59,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:59,864 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-04-17 22:57:59,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:59,864 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 22:57:59,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:59,866 INFO L225 Difference]: With dead ends: 156 [2020-04-17 22:57:59,866 INFO L226 Difference]: Without dead ends: 153 [2020-04-17 22:57:59,866 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:57:59,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-04-17 22:57:59,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-04-17 22:57:59,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-04-17 22:57:59,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-04-17 22:57:59,870 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-04-17 22:57:59,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:59,870 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-04-17 22:57:59,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:57:59,871 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-04-17 22:57:59,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:59,871 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:59,871 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:00,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:00,074 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:00,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:00,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1985246760, now seen corresponding path program 16 times [2020-04-17 22:58:00,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:00,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472384427] [2020-04-17 22:58:00,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:00,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:00,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472384427] [2020-04-17 22:58:00,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099225414] [2020-04-17 22:58:00,177 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:00,219 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:00,219 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:00,220 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:00,220 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:00,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:00,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:00,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:00,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949269229] [2020-04-17 22:58:00,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:00,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:00,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:00,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:00,310 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-04-17 22:58:00,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:00,392 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-04-17 22:58:00,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:58:00,393 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 22:58:00,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:00,394 INFO L225 Difference]: With dead ends: 170 [2020-04-17 22:58:00,394 INFO L226 Difference]: Without dead ends: 167 [2020-04-17 22:58:00,395 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:58:00,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-04-17 22:58:00,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-04-17 22:58:00,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-04-17 22:58:00,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-04-17 22:58:00,398 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-04-17 22:58:00,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:00,398 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-04-17 22:58:00,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:00,398 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-04-17 22:58:00,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:58:00,399 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:00,399 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:00,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:00,601 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:00,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:00,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1644785416, now seen corresponding path program 17 times [2020-04-17 22:58:00,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:00,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529280699] [2020-04-17 22:58:00,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:00,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:00,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529280699] [2020-04-17 22:58:00,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033873402] [2020-04-17 22:58:00,683 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:00,722 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:58:00,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:00,723 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:00,724 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:00,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:00,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:00,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400695199] [2020-04-17 22:58:00,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:00,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:00,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:00,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:00,820 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-04-17 22:58:00,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:00,906 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-04-17 22:58:00,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:58:00,906 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 22:58:00,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:00,908 INFO L225 Difference]: With dead ends: 169 [2020-04-17 22:58:00,908 INFO L226 Difference]: Without dead ends: 166 [2020-04-17 22:58:00,908 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:58:00,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-04-17 22:58:00,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-04-17 22:58:00,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-04-17 22:58:00,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-04-17 22:58:00,912 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-04-17 22:58:00,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:00,912 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-04-17 22:58:00,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:00,912 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-04-17 22:58:00,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:58:00,913 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:00,913 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:01,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:01,116 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:01,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:01,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1623335896, now seen corresponding path program 18 times [2020-04-17 22:58:01,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:01,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150637799] [2020-04-17 22:58:01,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:01,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:01,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150637799] [2020-04-17 22:58:01,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879338200] [2020-04-17 22:58:01,201 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:01,251 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:58:01,251 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:01,251 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:01,252 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:01,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:01,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:01,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:01,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998711861] [2020-04-17 22:58:01,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:01,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:01,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:01,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:01,384 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-04-17 22:58:01,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:01,511 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-04-17 22:58:01,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:58:01,511 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 22:58:01,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:01,513 INFO L225 Difference]: With dead ends: 168 [2020-04-17 22:58:01,513 INFO L226 Difference]: Without dead ends: 165 [2020-04-17 22:58:01,514 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:58:01,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-04-17 22:58:01,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-04-17 22:58:01,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-04-17 22:58:01,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-04-17 22:58:01,519 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-04-17 22:58:01,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:01,519 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-04-17 22:58:01,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:01,520 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-04-17 22:58:01,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:58:01,520 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:01,520 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:01,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:01,725 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:01,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:01,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1622643976, now seen corresponding path program 19 times [2020-04-17 22:58:01,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:01,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746236777] [2020-04-17 22:58:01,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:01,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746236777] [2020-04-17 22:58:01,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738009026] [2020-04-17 22:58:01,831 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:01,906 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:01,907 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:02,103 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:02,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:02,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:02,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200380824] [2020-04-17 22:58:02,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:02,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:02,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:02,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:02,105 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-04-17 22:58:02,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:02,270 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-04-17 22:58:02,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:58:02,270 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 22:58:02,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:02,271 INFO L225 Difference]: With dead ends: 167 [2020-04-17 22:58:02,271 INFO L226 Difference]: Without dead ends: 164 [2020-04-17 22:58:02,271 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-04-17 22:58:02,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-04-17 22:58:02,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-04-17 22:58:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-04-17 22:58:02,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-04-17 22:58:02,275 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-04-17 22:58:02,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:02,276 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-04-17 22:58:02,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:02,276 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-04-17 22:58:02,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:58:02,277 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:02,277 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:02,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:02,483 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:02,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:02,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1622621656, now seen corresponding path program 20 times [2020-04-17 22:58:02,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:02,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984826454] [2020-04-17 22:58:02,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:02,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:02,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:02,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984826454] [2020-04-17 22:58:02,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217012026] [2020-04-17 22:58:02,570 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:02,617 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:02,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:02,618 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:02,619 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:02,748 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:02,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:02,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:02,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598906083] [2020-04-17 22:58:02,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:02,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:02,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:02,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:02,760 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-04-17 22:58:02,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:02,940 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-04-17 22:58:02,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:02,940 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 22:58:02,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:02,942 INFO L225 Difference]: With dead ends: 176 [2020-04-17 22:58:02,942 INFO L226 Difference]: Without dead ends: 170 [2020-04-17 22:58:02,943 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:02,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-04-17 22:58:02,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-04-17 22:58:02,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-04-17 22:58:02,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-04-17 22:58:02,946 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-04-17 22:58:02,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:02,946 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-04-17 22:58:02,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:02,947 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-04-17 22:58:02,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:02,947 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:02,947 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:03,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:03,148 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:03,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:03,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1730118241, now seen corresponding path program 50 times [2020-04-17 22:58:03,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:03,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594922940] [2020-04-17 22:58:03,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:03,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:03,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594922940] [2020-04-17 22:58:03,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679556139] [2020-04-17 22:58:03,225 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:03,270 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:03,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:03,271 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:03,271 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:03,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:03,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:03,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:03,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545807539] [2020-04-17 22:58:03,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:03,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:03,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:03,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:03,396 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-04-17 22:58:03,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:03,443 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-04-17 22:58:03,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:58:03,443 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:03,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:03,445 INFO L225 Difference]: With dead ends: 163 [2020-04-17 22:58:03,445 INFO L226 Difference]: Without dead ends: 161 [2020-04-17 22:58:03,445 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:03,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-04-17 22:58:03,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-04-17 22:58:03,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-04-17 22:58:03,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-04-17 22:58:03,449 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-04-17 22:58:03,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:03,449 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-04-17 22:58:03,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:03,450 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-04-17 22:58:03,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:03,450 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:03,450 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:03,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:03,653 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:03,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:03,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 51 times [2020-04-17 22:58:03,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:03,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398750509] [2020-04-17 22:58:03,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:03,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:03,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398750509] [2020-04-17 22:58:03,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066811560] [2020-04-17 22:58:03,743 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:03,792 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:58:03,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:03,793 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:03,794 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:03,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:03,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:03,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35021155] [2020-04-17 22:58:03,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:03,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:03,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:03,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:03,906 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-04-17 22:58:04,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:04,042 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-04-17 22:58:04,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:58:04,042 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:04,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:04,044 INFO L225 Difference]: With dead ends: 172 [2020-04-17 22:58:04,044 INFO L226 Difference]: Without dead ends: 170 [2020-04-17 22:58:04,045 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-04-17 22:58:04,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-04-17 22:58:04,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-04-17 22:58:04,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 22:58:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-04-17 22:58:04,049 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-04-17 22:58:04,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:04,049 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-04-17 22:58:04,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:04,049 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-04-17 22:58:04,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:04,050 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:04,050 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:04,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:04,254 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:04,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:04,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 52 times [2020-04-17 22:58:04,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:04,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83563060] [2020-04-17 22:58:04,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:04,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:04,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83563060] [2020-04-17 22:58:04,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915227842] [2020-04-17 22:58:04,333 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:04,374 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:04,374 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:04,375 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:04,375 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:04,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:04,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:04,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403617594] [2020-04-17 22:58:04,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:04,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:04,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:04,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:04,504 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-04-17 22:58:04,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:04,686 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-04-17 22:58:04,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:58:04,687 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:04,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:04,688 INFO L225 Difference]: With dead ends: 179 [2020-04-17 22:58:04,688 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 22:58:04,688 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:58:04,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 22:58:04,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-04-17 22:58:04,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-04-17 22:58:04,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-04-17 22:58:04,693 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-04-17 22:58:04,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:04,693 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-04-17 22:58:04,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:04,693 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-04-17 22:58:04,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:04,694 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:04,694 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:04,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:04,897 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:04,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:04,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 53 times [2020-04-17 22:58:04,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:04,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316431077] [2020-04-17 22:58:04,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:04,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:04,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:04,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316431077] [2020-04-17 22:58:04,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273399985] [2020-04-17 22:58:04,987 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:05,033 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:05,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:05,034 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:05,035 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:05,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:05,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:05,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:05,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443462165] [2020-04-17 22:58:05,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:05,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:05,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:05,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:05,136 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-04-17 22:58:05,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:05,310 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-04-17 22:58:05,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:58:05,310 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:05,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:05,312 INFO L225 Difference]: With dead ends: 179 [2020-04-17 22:58:05,312 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 22:58:05,312 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:05,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 22:58:05,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-04-17 22:58:05,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 22:58:05,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-04-17 22:58:05,316 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-04-17 22:58:05,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:05,316 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-04-17 22:58:05,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:05,316 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-04-17 22:58:05,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:05,316 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:05,316 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:05,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:05,522 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:05,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:05,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 54 times [2020-04-17 22:58:05,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:05,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392856264] [2020-04-17 22:58:05,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:05,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:05,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392856264] [2020-04-17 22:58:05,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628911903] [2020-04-17 22:58:05,602 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:05,646 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:05,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:05,647 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:05,647 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:05,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:05,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:05,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:05,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289345984] [2020-04-17 22:58:05,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:05,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:05,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:05,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:05,736 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-04-17 22:58:05,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:05,927 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-04-17 22:58:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:58:05,927 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:05,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:05,929 INFO L225 Difference]: With dead ends: 184 [2020-04-17 22:58:05,929 INFO L226 Difference]: Without dead ends: 182 [2020-04-17 22:58:05,929 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:05,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-04-17 22:58:05,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-04-17 22:58:05,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 22:58:05,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-04-17 22:58:05,933 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-04-17 22:58:05,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:05,933 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-04-17 22:58:05,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:05,933 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-04-17 22:58:05,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:05,934 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:05,934 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:06,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:06,137 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:06,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:06,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 55 times [2020-04-17 22:58:06,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:06,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550842119] [2020-04-17 22:58:06,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:06,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550842119] [2020-04-17 22:58:06,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890814821] [2020-04-17 22:58:06,209 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:06,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:06,252 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:06,252 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:06,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:06,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:06,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167954974] [2020-04-17 22:58:06,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:06,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:06,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:06,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:06,734 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-04-17 22:58:06,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:06,933 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-04-17 22:58:06,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:58:06,934 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:06,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:06,935 INFO L225 Difference]: With dead ends: 179 [2020-04-17 22:58:06,935 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 22:58:06,936 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:06,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 22:58:06,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-04-17 22:58:06,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-04-17 22:58:06,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-04-17 22:58:06,940 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-04-17 22:58:06,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:06,940 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-04-17 22:58:06,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:06,940 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-04-17 22:58:06,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:06,941 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:06,941 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:07,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:07,144 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:07,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:07,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 56 times [2020-04-17 22:58:07,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:07,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068696649] [2020-04-17 22:58:07,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:07,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:07,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068696649] [2020-04-17 22:58:07,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452300072] [2020-04-17 22:58:07,235 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:07,276 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:07,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:07,277 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:07,277 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:07,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:07,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:07,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:07,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320283278] [2020-04-17 22:58:07,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:07,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:07,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:07,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:07,391 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-04-17 22:58:07,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:07,548 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-04-17 22:58:07,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:58:07,548 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:07,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:07,550 INFO L225 Difference]: With dead ends: 176 [2020-04-17 22:58:07,550 INFO L226 Difference]: Without dead ends: 174 [2020-04-17 22:58:07,550 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:58:07,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-04-17 22:58:07,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-04-17 22:58:07,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 22:58:07,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-04-17 22:58:07,554 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-04-17 22:58:07,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:07,554 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-04-17 22:58:07,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:07,554 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-04-17 22:58:07,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:07,555 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:07,555 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:07,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:07,758 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:07,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:07,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 57 times [2020-04-17 22:58:07,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:07,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502810726] [2020-04-17 22:58:07,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:07,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502810726] [2020-04-17 22:58:07,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940345289] [2020-04-17 22:58:07,844 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:07,891 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:58:07,891 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:07,892 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:07,892 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:08,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:08,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:08,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905678004] [2020-04-17 22:58:08,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:08,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:08,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:08,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:08,520 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-04-17 22:58:08,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:08,716 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-04-17 22:58:08,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:58:08,717 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:08,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:08,718 INFO L225 Difference]: With dead ends: 185 [2020-04-17 22:58:08,718 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 22:58:08,718 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:08,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 22:58:08,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-04-17 22:58:08,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 22:58:08,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-04-17 22:58:08,723 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-04-17 22:58:08,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:08,723 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-04-17 22:58:08,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:08,723 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-04-17 22:58:08,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:08,724 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:08,724 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:08,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:08,927 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:08,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:08,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 58 times [2020-04-17 22:58:08,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:08,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820633352] [2020-04-17 22:58:08,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:09,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820633352] [2020-04-17 22:58:09,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765484161] [2020-04-17 22:58:09,017 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:09,059 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:09,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:09,060 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:09,060 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:09,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:09,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:09,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076455225] [2020-04-17 22:58:09,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:09,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:09,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:09,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:09,140 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-04-17 22:58:09,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:09,329 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-04-17 22:58:09,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:58:09,330 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:09,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:09,331 INFO L225 Difference]: With dead ends: 185 [2020-04-17 22:58:09,331 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 22:58:09,332 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:09,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 22:58:09,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-04-17 22:58:09,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-04-17 22:58:09,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-04-17 22:58:09,336 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-04-17 22:58:09,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:09,337 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-04-17 22:58:09,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:09,337 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-04-17 22:58:09,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:09,338 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:09,338 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:09,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:09,543 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:09,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:09,544 INFO L82 PathProgramCache]: Analyzing trace with hash 9395951, now seen corresponding path program 59 times [2020-04-17 22:58:09,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:09,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216367374] [2020-04-17 22:58:09,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:09,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:09,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216367374] [2020-04-17 22:58:09,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627361809] [2020-04-17 22:58:09,661 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:09,701 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:58:09,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:09,702 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:09,703 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:09,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:09,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:09,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404153785] [2020-04-17 22:58:09,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:09,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:09,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:09,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:09,799 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-04-17 22:58:09,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:09,867 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-04-17 22:58:09,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:58:09,868 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:09,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:09,869 INFO L225 Difference]: With dead ends: 182 [2020-04-17 22:58:09,869 INFO L226 Difference]: Without dead ends: 180 [2020-04-17 22:58:09,870 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:58:09,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-04-17 22:58:09,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-04-17 22:58:09,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 22:58:09,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-04-17 22:58:09,873 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-04-17 22:58:09,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:09,874 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-04-17 22:58:09,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:09,874 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-04-17 22:58:09,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:09,875 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:09,875 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:10,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:10,076 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:10,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:10,076 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 60 times [2020-04-17 22:58:10,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:10,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254525461] [2020-04-17 22:58:10,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:10,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254525461] [2020-04-17 22:58:10,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891031117] [2020-04-17 22:58:10,180 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:10,222 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:10,222 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:10,223 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:10,223 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:10,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:10,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:10,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687101132] [2020-04-17 22:58:10,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:10,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:10,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:10,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:10,318 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-04-17 22:58:10,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:10,478 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-04-17 22:58:10,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 22:58:10,478 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:10,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:10,480 INFO L225 Difference]: With dead ends: 185 [2020-04-17 22:58:10,480 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 22:58:10,480 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:58:10,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 22:58:10,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-04-17 22:58:10,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:10,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-04-17 22:58:10,484 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-04-17 22:58:10,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:10,485 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-04-17 22:58:10,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:10,485 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-04-17 22:58:10,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:10,486 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:10,486 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:10,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:10,689 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:10,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:10,689 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 61 times [2020-04-17 22:58:10,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:10,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409305164] [2020-04-17 22:58:10,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:10,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:10,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409305164] [2020-04-17 22:58:10,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071222689] [2020-04-17 22:58:10,787 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:10,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:10,829 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:10,829 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:10,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:10,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:10,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:10,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757746853] [2020-04-17 22:58:10,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:10,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:10,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:10,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:10,942 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-04-17 22:58:11,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:11,148 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-04-17 22:58:11,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 22:58:11,149 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:11,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:11,150 INFO L225 Difference]: With dead ends: 191 [2020-04-17 22:58:11,150 INFO L226 Difference]: Without dead ends: 189 [2020-04-17 22:58:11,151 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:11,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-04-17 22:58:11,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-04-17 22:58:11,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 22:58:11,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-04-17 22:58:11,154 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-04-17 22:58:11,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:11,154 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-04-17 22:58:11,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:11,155 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-04-17 22:58:11,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:11,155 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:11,155 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:11,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:11,356 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:11,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:11,356 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 62 times [2020-04-17 22:58:11,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:11,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252594466] [2020-04-17 22:58:11,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:11,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:11,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252594466] [2020-04-17 22:58:11,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519979610] [2020-04-17 22:58:11,429 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:11,474 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:11,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:11,475 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:11,476 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:11,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:11,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:11,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591461965] [2020-04-17 22:58:11,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:11,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:11,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:11,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:11,579 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-04-17 22:58:11,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:11,808 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-04-17 22:58:11,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:11,808 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:11,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:11,810 INFO L225 Difference]: With dead ends: 187 [2020-04-17 22:58:11,810 INFO L226 Difference]: Without dead ends: 185 [2020-04-17 22:58:11,811 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:11,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-04-17 22:58:11,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-04-17 22:58:11,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:11,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-04-17 22:58:11,814 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-04-17 22:58:11,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:11,815 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-04-17 22:58:11,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:11,815 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-04-17 22:58:11,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:11,815 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:11,816 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:12,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:12,018 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:12,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:12,018 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 63 times [2020-04-17 22:58:12,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:12,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994928533] [2020-04-17 22:58:12,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:12,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:12,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994928533] [2020-04-17 22:58:12,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121648060] [2020-04-17 22:58:12,105 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:12,150 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:58:12,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:12,151 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:12,152 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:12,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:12,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:12,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873604829] [2020-04-17 22:58:12,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:12,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:12,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:12,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:12,258 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-04-17 22:58:12,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:12,482 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-04-17 22:58:12,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:12,482 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:12,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:12,484 INFO L225 Difference]: With dead ends: 198 [2020-04-17 22:58:12,484 INFO L226 Difference]: Without dead ends: 196 [2020-04-17 22:58:12,485 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:12,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-04-17 22:58:12,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-04-17 22:58:12,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:12,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-04-17 22:58:12,488 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-04-17 22:58:12,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:12,488 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-04-17 22:58:12,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:12,489 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-04-17 22:58:12,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:12,489 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:12,489 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:12,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:12,690 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:12,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:12,690 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 64 times [2020-04-17 22:58:12,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:12,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146598818] [2020-04-17 22:58:12,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:12,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146598818] [2020-04-17 22:58:12,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407333203] [2020-04-17 22:58:12,764 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:12,806 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:12,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:12,807 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:12,807 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:13,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:13,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:13,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512147285] [2020-04-17 22:58:13,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:13,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:13,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:13,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:13,317 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-04-17 22:58:13,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:13,572 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-04-17 22:58:13,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:13,572 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:13,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:13,574 INFO L225 Difference]: With dead ends: 189 [2020-04-17 22:58:13,574 INFO L226 Difference]: Without dead ends: 187 [2020-04-17 22:58:13,574 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:13,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-04-17 22:58:13,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-04-17 22:58:13,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 22:58:13,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-04-17 22:58:13,577 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-04-17 22:58:13,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:13,578 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-04-17 22:58:13,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:13,578 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-04-17 22:58:13,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:13,578 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:13,579 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:13,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:13,779 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:13,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:13,780 INFO L82 PathProgramCache]: Analyzing trace with hash 646625441, now seen corresponding path program 65 times [2020-04-17 22:58:13,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:13,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394100589] [2020-04-17 22:58:13,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:13,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:13,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394100589] [2020-04-17 22:58:13,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494588463] [2020-04-17 22:58:13,891 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:13,951 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:58:13,952 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:13,953 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:13,953 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:14,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:14,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:14,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:14,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185694105] [2020-04-17 22:58:14,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:14,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:14,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:14,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:14,081 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-04-17 22:58:14,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:14,177 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-04-17 22:58:14,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:58:14,178 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:14,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:14,179 INFO L225 Difference]: With dead ends: 178 [2020-04-17 22:58:14,180 INFO L226 Difference]: Without dead ends: 176 [2020-04-17 22:58:14,180 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:58:14,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-04-17 22:58:14,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-04-17 22:58:14,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 22:58:14,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-04-17 22:58:14,183 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-04-17 22:58:14,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:14,183 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-04-17 22:58:14,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:14,184 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-04-17 22:58:14,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:14,184 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:14,184 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:14,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:14,385 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:14,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:14,385 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 66 times [2020-04-17 22:58:14,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:14,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895322148] [2020-04-17 22:58:14,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:14,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895322148] [2020-04-17 22:58:14,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893274401] [2020-04-17 22:58:14,470 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:14,513 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:14,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:14,514 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:14,514 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:14,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:14,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:14,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734373043] [2020-04-17 22:58:14,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:14,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:14,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:14,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:14,621 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-04-17 22:58:14,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:14,804 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-04-17 22:58:14,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:14,804 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:14,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:14,806 INFO L225 Difference]: With dead ends: 193 [2020-04-17 22:58:14,806 INFO L226 Difference]: Without dead ends: 191 [2020-04-17 22:58:14,806 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:14,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-04-17 22:58:14,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-04-17 22:58:14,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 22:58:14,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-04-17 22:58:14,809 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-04-17 22:58:14,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:14,809 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-04-17 22:58:14,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:14,809 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-04-17 22:58:14,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:14,810 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:14,810 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:15,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:15,011 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:15,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:15,011 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 67 times [2020-04-17 22:58:15,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:15,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313281896] [2020-04-17 22:58:15,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:15,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:15,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313281896] [2020-04-17 22:58:15,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072606246] [2020-04-17 22:58:15,086 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:15,128 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:15,129 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:15,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:15,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:15,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500653550] [2020-04-17 22:58:15,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:15,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:15,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:15,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:15,261 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-04-17 22:58:15,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:15,508 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-04-17 22:58:15,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:15,509 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:15,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:15,511 INFO L225 Difference]: With dead ends: 195 [2020-04-17 22:58:15,511 INFO L226 Difference]: Without dead ends: 193 [2020-04-17 22:58:15,511 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:58:15,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-17 22:58:15,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-04-17 22:58:15,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 22:58:15,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-04-17 22:58:15,515 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-04-17 22:58:15,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:15,515 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-04-17 22:58:15,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:15,515 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-04-17 22:58:15,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:15,515 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:15,515 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:15,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:15,716 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:15,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:15,717 INFO L82 PathProgramCache]: Analyzing trace with hash 667181231, now seen corresponding path program 68 times [2020-04-17 22:58:15,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:15,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406591552] [2020-04-17 22:58:15,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:15,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:15,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:15,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406591552] [2020-04-17 22:58:15,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009494589] [2020-04-17 22:58:15,807 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:15,870 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:15,870 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:15,871 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:15,871 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:15,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:15,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:15,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:15,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240044106] [2020-04-17 22:58:15,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:15,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:15,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:15,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:15,987 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-04-17 22:58:16,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:16,099 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-04-17 22:58:16,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:58:16,100 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:16,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:16,101 INFO L225 Difference]: With dead ends: 174 [2020-04-17 22:58:16,101 INFO L226 Difference]: Without dead ends: 172 [2020-04-17 22:58:16,102 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:58:16,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-04-17 22:58:16,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-04-17 22:58:16,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:16,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-04-17 22:58:16,105 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-04-17 22:58:16,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:16,105 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-04-17 22:58:16,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:16,105 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-04-17 22:58:16,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:16,106 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:16,106 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:16,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:16,309 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:16,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:16,310 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 69 times [2020-04-17 22:58:16,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:16,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377777845] [2020-04-17 22:58:16,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:16,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:16,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:16,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377777845] [2020-04-17 22:58:16,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886424565] [2020-04-17 22:58:16,383 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:16,426 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:58:16,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:16,427 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:16,428 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:16,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:16,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:16,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883563173] [2020-04-17 22:58:16,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:16,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:16,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:16,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:16,538 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-04-17 22:58:16,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:16,759 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-04-17 22:58:16,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:16,759 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:16,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:16,761 INFO L225 Difference]: With dead ends: 189 [2020-04-17 22:58:16,761 INFO L226 Difference]: Without dead ends: 187 [2020-04-17 22:58:16,761 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:58:16,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-04-17 22:58:16,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-04-17 22:58:16,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 22:58:16,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-04-17 22:58:16,766 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-04-17 22:58:16,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:16,766 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-04-17 22:58:16,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:16,766 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-04-17 22:58:16,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:16,772 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:16,772 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:16,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:16,973 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:16,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:16,974 INFO L82 PathProgramCache]: Analyzing trace with hash 667844321, now seen corresponding path program 70 times [2020-04-17 22:58:16,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:16,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002471860] [2020-04-17 22:58:16,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:16,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:17,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:17,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002471860] [2020-04-17 22:58:17,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724690673] [2020-04-17 22:58:17,055 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:17,095 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:17,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:17,095 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:17,096 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:17,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:17,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:17,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:17,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119308760] [2020-04-17 22:58:17,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:17,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:17,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:17,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:17,186 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-04-17 22:58:17,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:17,326 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-04-17 22:58:17,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:58:17,327 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:17,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:17,328 INFO L225 Difference]: With dead ends: 175 [2020-04-17 22:58:17,328 INFO L226 Difference]: Without dead ends: 173 [2020-04-17 22:58:17,329 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-04-17 22:58:17,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-04-17 22:58:17,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-04-17 22:58:17,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 22:58:17,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 22:58:17,332 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 22:58:17,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:17,332 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 22:58:17,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:17,332 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 22:58:17,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:17,333 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:17,333 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:17,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:17,535 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:17,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:17,535 INFO L82 PathProgramCache]: Analyzing trace with hash 667866641, now seen corresponding path program 71 times [2020-04-17 22:58:17,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:17,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050784984] [2020-04-17 22:58:17,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:17,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:17,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050784984] [2020-04-17 22:58:17,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845701567] [2020-04-17 22:58:17,597 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:17,642 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:58:17,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:17,643 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:17,644 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:17,723 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:17,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:17,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:17,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286582919] [2020-04-17 22:58:17,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:17,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:17,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:17,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:17,739 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-04-17 22:58:18,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:18,033 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-04-17 22:58:18,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:18,033 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:18,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:18,034 INFO L225 Difference]: With dead ends: 195 [2020-04-17 22:58:18,034 INFO L226 Difference]: Without dead ends: 190 [2020-04-17 22:58:18,035 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:58:18,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-04-17 22:58:18,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-04-17 22:58:18,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 22:58:18,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-04-17 22:58:18,038 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-04-17 22:58:18,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:18,038 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-04-17 22:58:18,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:18,038 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-04-17 22:58:18,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:18,039 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:18,039 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:18,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:18,240 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:18,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:18,240 INFO L82 PathProgramCache]: Analyzing trace with hash 667874112, now seen corresponding path program 72 times [2020-04-17 22:58:18,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:18,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322880077] [2020-04-17 22:58:18,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:18,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:18,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322880077] [2020-04-17 22:58:18,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172765402] [2020-04-17 22:58:18,299 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:18,339 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:18,339 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:18,340 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:18,340 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:18,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:18,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:18,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480018165] [2020-04-17 22:58:18,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:18,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:18,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:18,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:18,459 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-04-17 22:58:18,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:18,681 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-04-17 22:58:18,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 22:58:18,682 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:18,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:18,683 INFO L225 Difference]: With dead ends: 187 [2020-04-17 22:58:18,684 INFO L226 Difference]: Without dead ends: 185 [2020-04-17 22:58:18,684 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:18,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-04-17 22:58:18,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-04-17 22:58:18,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 22:58:18,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 22:58:18,687 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 22:58:18,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:18,687 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 22:58:18,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:18,688 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 22:58:18,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:18,688 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:18,688 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:18,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:18,889 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:18,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:18,889 INFO L82 PathProgramCache]: Analyzing trace with hash 667895471, now seen corresponding path program 73 times [2020-04-17 22:58:18,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:18,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631509093] [2020-04-17 22:58:18,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:18,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:18,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:18,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631509093] [2020-04-17 22:58:18,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100480109] [2020-04-17 22:58:18,948 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:18,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:18,991 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:18,992 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:19,227 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:19,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:19,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:19,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797289747] [2020-04-17 22:58:19,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:19,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:19,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:19,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:19,241 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-04-17 22:58:19,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:19,651 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-04-17 22:58:19,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:58:19,651 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:19,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:19,653 INFO L225 Difference]: With dead ends: 212 [2020-04-17 22:58:19,653 INFO L226 Difference]: Without dead ends: 207 [2020-04-17 22:58:19,654 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-04-17 22:58:19,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-04-17 22:58:19,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-04-17 22:58:19,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 22:58:19,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 22:58:19,658 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 22:58:19,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:19,658 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 22:58:19,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:19,658 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 22:58:19,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:19,659 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:19,659 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:19,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:19,862 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:19,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:19,863 INFO L82 PathProgramCache]: Analyzing trace with hash 667896432, now seen corresponding path program 74 times [2020-04-17 22:58:19,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:19,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064733309] [2020-04-17 22:58:19,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:19,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064733309] [2020-04-17 22:58:19,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878226580] [2020-04-17 22:58:19,931 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:19,977 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:19,977 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:19,978 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:19,979 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:20,058 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:20,880 WARN L192 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-04-17 22:58:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:20,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:20,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:58:20,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166907627] [2020-04-17 22:58:20,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:58:20,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:20,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:58:20,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=172, Unknown=1, NotChecked=0, Total=240 [2020-04-17 22:58:20,883 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 16 states. [2020-04-17 22:58:21,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:21,218 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-04-17 22:58:21,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:21,218 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 22:58:21,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:21,220 INFO L225 Difference]: With dead ends: 202 [2020-04-17 22:58:21,220 INFO L226 Difference]: Without dead ends: 197 [2020-04-17 22:58:21,221 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=208, Invalid=441, Unknown=1, NotChecked=0, Total=650 [2020-04-17 22:58:21,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-04-17 22:58:21,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-04-17 22:58:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 22:58:21,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-04-17 22:58:21,224 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-04-17 22:58:21,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:21,224 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-04-17 22:58:21,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:58:21,224 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-04-17 22:58:21,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:21,225 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:21,225 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:21,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:21,426 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:21,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:21,426 INFO L82 PathProgramCache]: Analyzing trace with hash 668104752, now seen corresponding path program 75 times [2020-04-17 22:58:21,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:21,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433174084] [2020-04-17 22:58:21,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:21,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:21,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433174084] [2020-04-17 22:58:21,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858727200] [2020-04-17 22:58:21,500 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:21,543 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:58:21,543 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:21,543 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:21,544 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:25,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:25,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:25,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539183941] [2020-04-17 22:58:25,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:25,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:25,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:25,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:25,735 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-04-17 22:58:26,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:26,018 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-04-17 22:58:26,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:26,019 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:26,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:26,020 INFO L225 Difference]: With dead ends: 198 [2020-04-17 22:58:26,020 INFO L226 Difference]: Without dead ends: 196 [2020-04-17 22:58:26,021 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:26,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-04-17 22:58:26,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-04-17 22:58:26,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 22:58:26,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-04-17 22:58:26,024 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-04-17 22:58:26,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:26,024 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-04-17 22:58:26,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:26,024 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-04-17 22:58:26,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:26,025 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:26,025 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:26,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:26,229 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:26,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:26,229 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 76 times [2020-04-17 22:58:26,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:26,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371240865] [2020-04-17 22:58:26,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:26,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371240865] [2020-04-17 22:58:26,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776238250] [2020-04-17 22:58:26,299 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:26,341 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:26,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:26,342 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:26,342 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:32,586 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 20 [2020-04-17 22:58:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:32,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:32,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:58:32,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171854880] [2020-04-17 22:58:32,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:58:32,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:32,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:58:32,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=173, Unknown=2, NotChecked=0, Total=240 [2020-04-17 22:58:32,589 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 16 states. [2020-04-17 22:58:34,914 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 26 [2020-04-17 22:58:39,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:39,131 INFO L93 Difference]: Finished difference Result 218 states and 512 transitions. [2020-04-17 22:58:39,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:58:39,132 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 22:58:39,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:39,133 INFO L225 Difference]: With dead ends: 218 [2020-04-17 22:58:39,133 INFO L226 Difference]: Without dead ends: 216 [2020-04-17 22:58:39,134 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=216, Invalid=484, Unknown=2, NotChecked=0, Total=702 [2020-04-17 22:58:39,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-04-17 22:58:39,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 145. [2020-04-17 22:58:39,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 22:58:39,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 22:58:39,137 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 22:58:39,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:39,138 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 22:58:39,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:58:39,138 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 22:58:39,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:39,138 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:39,138 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:39,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:39,342 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:39,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:39,342 INFO L82 PathProgramCache]: Analyzing trace with hash 668789201, now seen corresponding path program 77 times [2020-04-17 22:58:39,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:39,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768468196] [2020-04-17 22:58:39,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:39,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768468196] [2020-04-17 22:58:39,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896170462] [2020-04-17 22:58:39,409 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:39,450 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:58:39,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:39,451 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:39,451 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:39,586 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:39,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:39,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:39,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:39,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923337528] [2020-04-17 22:58:39,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:39,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:39,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:39,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:39,601 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-04-17 22:58:40,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:40,260 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-04-17 22:58:40,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:58:40,260 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:40,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:40,262 INFO L225 Difference]: With dead ends: 217 [2020-04-17 22:58:40,262 INFO L226 Difference]: Without dead ends: 212 [2020-04-17 22:58:40,263 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-04-17 22:58:40,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-04-17 22:58:40,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-04-17 22:58:40,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-04-17 22:58:40,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-04-17 22:58:40,267 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-04-17 22:58:40,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:40,267 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-04-17 22:58:40,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:40,267 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-04-17 22:58:40,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:40,268 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:40,268 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:40,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:40,471 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:40,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:40,472 INFO L82 PathProgramCache]: Analyzing trace with hash 668790162, now seen corresponding path program 78 times [2020-04-17 22:58:40,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:40,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782836336] [2020-04-17 22:58:40,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:40,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782836336] [2020-04-17 22:58:40,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871941550] [2020-04-17 22:58:40,539 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:40,582 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:40,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:40,583 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:40,584 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:40,699 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:40,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:40,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:40,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844227514] [2020-04-17 22:58:40,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:40,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:40,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:40,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:40,714 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-04-17 22:58:41,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:41,325 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-04-17 22:58:41,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 22:58:41,326 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:41,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:41,327 INFO L225 Difference]: With dead ends: 236 [2020-04-17 22:58:41,327 INFO L226 Difference]: Without dead ends: 228 [2020-04-17 22:58:41,328 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=295, Invalid=635, Unknown=0, NotChecked=0, Total=930 [2020-04-17 22:58:41,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-04-17 22:58:41,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-04-17 22:58:41,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 22:58:41,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-04-17 22:58:41,332 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-04-17 22:58:41,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:41,332 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-04-17 22:58:41,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:41,332 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-04-17 22:58:41,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:41,333 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:41,333 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:41,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:41,534 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:41,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:41,534 INFO L82 PathProgramCache]: Analyzing trace with hash 668818992, now seen corresponding path program 79 times [2020-04-17 22:58:41,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:41,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353109692] [2020-04-17 22:58:41,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:41,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:41,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353109692] [2020-04-17 22:58:41,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330353484] [2020-04-17 22:58:41,613 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:41,656 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:41,657 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:41,774 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:41,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:41,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:41,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:41,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708437176] [2020-04-17 22:58:41,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:41,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:41,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:41,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:41,789 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-04-17 22:58:42,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:42,277 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-04-17 22:58:42,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:58:42,278 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:42,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:42,279 INFO L225 Difference]: With dead ends: 219 [2020-04-17 22:58:42,279 INFO L226 Difference]: Without dead ends: 214 [2020-04-17 22:58:42,279 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-04-17 22:58:42,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-04-17 22:58:42,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-04-17 22:58:42,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 22:58:42,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-04-17 22:58:42,282 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-04-17 22:58:42,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:42,282 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-04-17 22:58:42,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:42,282 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-04-17 22:58:42,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:42,283 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:42,283 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:42,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:42,486 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:42,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:42,487 INFO L82 PathProgramCache]: Analyzing trace with hash 675254592, now seen corresponding path program 80 times [2020-04-17 22:58:42,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:42,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828575293] [2020-04-17 22:58:42,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:42,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828575293] [2020-04-17 22:58:42,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245286221] [2020-04-17 22:58:42,556 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:42,600 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:42,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:42,601 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:42,601 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:42,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:42,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:42,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458234221] [2020-04-17 22:58:42,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:42,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:42,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:42,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:42,716 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-04-17 22:58:42,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:42,970 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-04-17 22:58:42,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:42,971 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:42,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:42,972 INFO L225 Difference]: With dead ends: 197 [2020-04-17 22:58:42,972 INFO L226 Difference]: Without dead ends: 195 [2020-04-17 22:58:42,972 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:42,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-04-17 22:58:42,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-04-17 22:58:42,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 22:58:42,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-04-17 22:58:42,975 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-04-17 22:58:42,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:42,976 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-04-17 22:58:42,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:42,976 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-04-17 22:58:42,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:42,976 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:42,976 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:43,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:43,180 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:43,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:43,180 INFO L82 PathProgramCache]: Analyzing trace with hash 675255553, now seen corresponding path program 81 times [2020-04-17 22:58:43,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:43,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397870280] [2020-04-17 22:58:43,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:43,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397870280] [2020-04-17 22:58:43,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920105566] [2020-04-17 22:58:43,250 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:43,293 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:58:43,293 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:43,294 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:43,294 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:43,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:43,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:43,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284676349] [2020-04-17 22:58:43,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:43,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:43,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:43,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:43,403 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-04-17 22:58:43,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:43,654 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-04-17 22:58:43,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:43,654 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:43,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:43,655 INFO L225 Difference]: With dead ends: 202 [2020-04-17 22:58:43,655 INFO L226 Difference]: Without dead ends: 200 [2020-04-17 22:58:43,655 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:43,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-04-17 22:58:43,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-04-17 22:58:43,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 22:58:43,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-04-17 22:58:43,659 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-04-17 22:58:43,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:43,659 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-04-17 22:58:43,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:43,659 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-04-17 22:58:43,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:43,660 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:43,660 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:43,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:43,861 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:43,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:43,862 INFO L82 PathProgramCache]: Analyzing trace with hash 675284383, now seen corresponding path program 82 times [2020-04-17 22:58:43,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:43,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798649315] [2020-04-17 22:58:43,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:43,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798649315] [2020-04-17 22:58:43,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631835705] [2020-04-17 22:58:43,926 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:43,967 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:43,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:43,967 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:43,968 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:44,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:44,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:44,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146035582] [2020-04-17 22:58:44,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:44,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:44,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:44,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:44,478 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-04-17 22:58:44,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:44,749 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-04-17 22:58:44,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:44,750 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:44,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:44,751 INFO L225 Difference]: With dead ends: 197 [2020-04-17 22:58:44,751 INFO L226 Difference]: Without dead ends: 195 [2020-04-17 22:58:44,751 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:44,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-04-17 22:58:44,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-04-17 22:58:44,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:44,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-04-17 22:58:44,755 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-04-17 22:58:44,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:44,755 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-04-17 22:58:44,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:44,755 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-04-17 22:58:44,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:44,756 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:44,756 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:44,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:44,957 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:44,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:44,957 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 83 times [2020-04-17 22:58:44,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:44,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521658440] [2020-04-17 22:58:44,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:44,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:45,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:45,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521658440] [2020-04-17 22:58:45,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495531319] [2020-04-17 22:58:45,020 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:45,064 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:45,064 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:45,065 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:45,065 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:45,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:45,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:45,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:45,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656910039] [2020-04-17 22:58:45,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:45,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:45,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:45,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:45,159 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-04-17 22:58:45,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:45,543 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-04-17 22:58:45,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 22:58:45,543 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:45,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:45,544 INFO L225 Difference]: With dead ends: 214 [2020-04-17 22:58:45,544 INFO L226 Difference]: Without dead ends: 212 [2020-04-17 22:58:45,545 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-04-17 22:58:45,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-04-17 22:58:45,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-04-17 22:58:45,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 22:58:45,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-04-17 22:58:45,548 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-04-17 22:58:45,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:45,548 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-04-17 22:58:45,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:45,549 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-04-17 22:58:45,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:45,549 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:45,549 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:45,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:45,751 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:45,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:45,751 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 84 times [2020-04-17 22:58:45,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:45,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495962320] [2020-04-17 22:58:45,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:45,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:45,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495962320] [2020-04-17 22:58:45,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222183276] [2020-04-17 22:58:45,849 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:45,898 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:45,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:45,899 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:45,900 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:46,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:46,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:46,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:46,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791043752] [2020-04-17 22:58:46,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:46,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:46,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:46,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:46,017 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-04-17 22:58:46,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:46,395 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-04-17 22:58:46,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:58:46,396 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:46,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:46,397 INFO L225 Difference]: With dead ends: 217 [2020-04-17 22:58:46,397 INFO L226 Difference]: Without dead ends: 215 [2020-04-17 22:58:46,397 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-04-17 22:58:46,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-04-17 22:58:46,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-04-17 22:58:46,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 22:58:46,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-04-17 22:58:46,401 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-04-17 22:58:46,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:46,401 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-04-17 22:58:46,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:46,402 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-04-17 22:58:46,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:46,402 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:46,402 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:46,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:46,605 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:46,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:46,606 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 85 times [2020-04-17 22:58:46,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:46,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786674236] [2020-04-17 22:58:46,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:46,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786674236] [2020-04-17 22:58:46,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542007760] [2020-04-17 22:58:46,672 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:46,717 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:46,717 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:46,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:46,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:46,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15206857] [2020-04-17 22:58:46,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:46,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:46,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:46,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:46,813 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-04-17 22:58:47,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:47,183 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-04-17 22:58:47,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 22:58:47,183 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:47,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:47,184 INFO L225 Difference]: With dead ends: 211 [2020-04-17 22:58:47,184 INFO L226 Difference]: Without dead ends: 209 [2020-04-17 22:58:47,185 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-04-17 22:58:47,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-04-17 22:58:47,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-04-17 22:58:47,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-04-17 22:58:47,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-04-17 22:58:47,188 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-04-17 22:58:47,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:47,188 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-04-17 22:58:47,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:47,189 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-04-17 22:58:47,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:47,189 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:47,189 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:47,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:47,390 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:47,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:47,390 INFO L82 PathProgramCache]: Analyzing trace with hash 696494831, now seen corresponding path program 86 times [2020-04-17 22:58:47,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:47,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75816632] [2020-04-17 22:58:47,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:47,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:47,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75816632] [2020-04-17 22:58:47,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042333289] [2020-04-17 22:58:47,458 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:47,501 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:47,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:47,502 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:47,502 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:47,573 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:47,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:47,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:47,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199902068] [2020-04-17 22:58:47,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:47,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:47,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:47,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:47,582 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-04-17 22:58:48,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:48,032 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-04-17 22:58:48,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 22:58:48,032 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:48,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:48,033 INFO L225 Difference]: With dead ends: 211 [2020-04-17 22:58:48,033 INFO L226 Difference]: Without dead ends: 206 [2020-04-17 22:58:48,034 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-04-17 22:58:48,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-04-17 22:58:48,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-04-17 22:58:48,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-04-17 22:58:48,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-04-17 22:58:48,037 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-04-17 22:58:48,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:48,037 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-04-17 22:58:48,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:48,037 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-04-17 22:58:48,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:48,038 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:48,038 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:48,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:48,238 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:48,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:48,239 INFO L82 PathProgramCache]: Analyzing trace with hash 696495792, now seen corresponding path program 87 times [2020-04-17 22:58:48,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:48,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436272021] [2020-04-17 22:58:48,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:48,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436272021] [2020-04-17 22:58:48,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805158508] [2020-04-17 22:58:48,311 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:48,355 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:58:48,355 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:48,356 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:48,356 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:48,441 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:48,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:48,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:48,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:48,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737286136] [2020-04-17 22:58:48,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:48,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:48,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:48,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:48,458 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-04-17 22:58:48,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:48,980 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-04-17 22:58:48,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 22:58:48,981 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:48,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:48,982 INFO L225 Difference]: With dead ends: 227 [2020-04-17 22:58:48,982 INFO L226 Difference]: Without dead ends: 222 [2020-04-17 22:58:48,982 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 22:58:48,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-04-17 22:58:48,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-04-17 22:58:48,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 22:58:48,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-04-17 22:58:48,986 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-04-17 22:58:48,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:48,986 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-04-17 22:58:48,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:48,986 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-04-17 22:58:48,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:48,987 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:48,987 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:49,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:49,188 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:49,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:49,188 INFO L82 PathProgramCache]: Analyzing trace with hash 696503263, now seen corresponding path program 88 times [2020-04-17 22:58:49,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:49,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623127844] [2020-04-17 22:58:49,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:49,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623127844] [2020-04-17 22:58:49,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839726742] [2020-04-17 22:58:49,255 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:49,300 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:49,300 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:49,301 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:49,301 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:49,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:49,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:49,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472907841] [2020-04-17 22:58:49,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:49,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:49,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:49,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:49,395 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-04-17 22:58:49,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:49,809 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-04-17 22:58:49,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 22:58:49,810 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:49,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:49,811 INFO L225 Difference]: With dead ends: 221 [2020-04-17 22:58:49,811 INFO L226 Difference]: Without dead ends: 219 [2020-04-17 22:58:49,811 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-04-17 22:58:49,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-04-17 22:58:49,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-04-17 22:58:49,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-04-17 22:58:49,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-04-17 22:58:49,814 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-04-17 22:58:49,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:49,815 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-04-17 22:58:49,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:49,815 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-04-17 22:58:49,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:49,815 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:49,815 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:50,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:50,016 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:50,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:50,017 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 89 times [2020-04-17 22:58:50,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:50,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693207280] [2020-04-17 22:58:50,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:50,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:50,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693207280] [2020-04-17 22:58:50,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096455519] [2020-04-17 22:58:50,088 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:50,137 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:58:50,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:50,138 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:50,139 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:50,217 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:50,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:50,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:50,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273693552] [2020-04-17 22:58:50,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:50,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:50,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:50,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:50,227 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-04-17 22:58:50,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:50,764 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-04-17 22:58:50,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 22:58:50,765 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:50,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:50,766 INFO L225 Difference]: With dead ends: 240 [2020-04-17 22:58:50,766 INFO L226 Difference]: Without dead ends: 232 [2020-04-17 22:58:50,767 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 22:58:50,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-04-17 22:58:50,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-04-17 22:58:50,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-04-17 22:58:50,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-04-17 22:58:50,770 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-04-17 22:58:50,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:50,771 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-04-17 22:58:50,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:50,771 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-04-17 22:58:50,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:50,771 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:50,771 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:50,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:50,972 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:50,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:50,972 INFO L82 PathProgramCache]: Analyzing trace with hash 696525583, now seen corresponding path program 90 times [2020-04-17 22:58:50,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:50,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112367499] [2020-04-17 22:58:50,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:50,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:51,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112367499] [2020-04-17 22:58:51,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200598715] [2020-04-17 22:58:51,035 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:51,075 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:51,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:51,076 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:51,076 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:51,150 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:51,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:51,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:51,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679217406] [2020-04-17 22:58:51,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:51,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:51,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:51,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:51,159 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-04-17 22:58:51,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:51,759 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-04-17 22:58:51,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 22:58:51,759 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:51,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:51,760 INFO L225 Difference]: With dead ends: 238 [2020-04-17 22:58:51,760 INFO L226 Difference]: Without dead ends: 230 [2020-04-17 22:58:51,761 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 22:58:51,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-04-17 22:58:51,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-04-17 22:58:51,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:51,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-04-17 22:58:51,764 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-04-17 22:58:51,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:51,764 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-04-17 22:58:51,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:51,764 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-04-17 22:58:51,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:51,765 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:51,765 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:51,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:51,965 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:51,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:51,966 INFO L82 PathProgramCache]: Analyzing trace with hash 696733903, now seen corresponding path program 91 times [2020-04-17 22:58:51,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:51,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963766092] [2020-04-17 22:58:51,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:52,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:52,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963766092] [2020-04-17 22:58:52,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200866290] [2020-04-17 22:58:52,045 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:52,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:52,089 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:52,089 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:52,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:52,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:52,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705915204] [2020-04-17 22:58:52,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:52,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:52,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:52,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:52,620 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-04-17 22:58:52,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:52,858 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-04-17 22:58:52,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:52,859 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:52,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:52,860 INFO L225 Difference]: With dead ends: 195 [2020-04-17 22:58:52,860 INFO L226 Difference]: Without dead ends: 193 [2020-04-17 22:58:52,860 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:52,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-17 22:58:52,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-04-17 22:58:52,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:52,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-04-17 22:58:52,863 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-04-17 22:58:52,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:52,864 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-04-17 22:58:52,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:52,864 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-04-17 22:58:52,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:52,864 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:52,864 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:53,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:53,065 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:53,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:53,065 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 92 times [2020-04-17 22:58:53,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:53,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257828129] [2020-04-17 22:58:53,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:53,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:53,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257828129] [2020-04-17 22:58:53,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300987188] [2020-04-17 22:58:53,134 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:53,177 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:53,177 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:53,178 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:53,178 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:53,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:53,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:53,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:53,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004478188] [2020-04-17 22:58:53,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:53,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:53,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:53,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:53,290 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-04-17 22:58:53,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:53,737 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-04-17 22:58:53,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:58:53,737 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:53,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:53,738 INFO L225 Difference]: With dead ends: 206 [2020-04-17 22:58:53,738 INFO L226 Difference]: Without dead ends: 204 [2020-04-17 22:58:53,739 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-04-17 22:58:53,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-04-17 22:58:53,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-04-17 22:58:53,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 22:58:53,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-04-17 22:58:53,742 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-04-17 22:58:53,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:53,743 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-04-17 22:58:53,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:53,743 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-04-17 22:58:53,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:53,743 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:53,743 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:53,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:53,944 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:53,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:53,945 INFO L82 PathProgramCache]: Analyzing trace with hash 697419313, now seen corresponding path program 93 times [2020-04-17 22:58:53,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:53,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214169433] [2020-04-17 22:58:53,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:54,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214169433] [2020-04-17 22:58:54,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920968553] [2020-04-17 22:58:54,008 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:54,047 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:58:54,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:54,048 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:58:54,049 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:54,124 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:56,650 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2020-04-17 22:58:56,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:56,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:56,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:58:56,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582281665] [2020-04-17 22:58:56,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:58:56,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:56,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:58:56,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=173, Unknown=1, NotChecked=0, Total=240 [2020-04-17 22:58:56,652 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-04-17 22:58:59,158 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2020-04-17 22:59:08,429 WARN L192 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-04-17 22:59:10,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:10,737 INFO L93 Difference]: Finished difference Result 244 states and 576 transitions. [2020-04-17 22:59:10,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 22:59:10,737 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 22:59:10,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:10,738 INFO L225 Difference]: With dead ends: 244 [2020-04-17 22:59:10,738 INFO L226 Difference]: Without dead ends: 239 [2020-04-17 22:59:10,739 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=314, Invalid=804, Unknown=4, NotChecked=0, Total=1122 [2020-04-17 22:59:10,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-04-17 22:59:10,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 139. [2020-04-17 22:59:10,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 22:59:10,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-04-17 22:59:10,742 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-04-17 22:59:10,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:10,742 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-04-17 22:59:10,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:59:10,742 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-04-17 22:59:10,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:10,743 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:10,743 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:10,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:10,946 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:10,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:10,946 INFO L82 PathProgramCache]: Analyzing trace with hash 896899632, now seen corresponding path program 94 times [2020-04-17 22:59:10,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:10,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496343276] [2020-04-17 22:59:10,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:10,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:11,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:11,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496343276] [2020-04-17 22:59:11,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361247352] [2020-04-17 22:59:11,020 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:11,059 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:59:11,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:11,060 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:11,060 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:11,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:11,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:11,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343702221] [2020-04-17 22:59:11,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:11,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:11,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:11,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:11,172 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-04-17 22:59:11,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:11,355 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-04-17 22:59:11,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:59:11,355 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:11,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:11,356 INFO L225 Difference]: With dead ends: 194 [2020-04-17 22:59:11,356 INFO L226 Difference]: Without dead ends: 192 [2020-04-17 22:59:11,357 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:59:11,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-04-17 22:59:11,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-04-17 22:59:11,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 22:59:11,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-04-17 22:59:11,360 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-04-17 22:59:11,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:11,360 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-04-17 22:59:11,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:11,360 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-04-17 22:59:11,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:11,360 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:11,360 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:11,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:11,561 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:11,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:11,562 INFO L82 PathProgramCache]: Analyzing trace with hash 896900593, now seen corresponding path program 95 times [2020-04-17 22:59:11,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:11,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389052967] [2020-04-17 22:59:11,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:11,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:11,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389052967] [2020-04-17 22:59:11,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630673668] [2020-04-17 22:59:11,635 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:11,676 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:59:11,676 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:11,677 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:11,678 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:12,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:12,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:12,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:12,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889571394] [2020-04-17 22:59:12,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:12,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:12,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:12,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:12,736 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-04-17 22:59:13,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:13,003 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-04-17 22:59:13,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:59:13,003 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:13,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:13,004 INFO L225 Difference]: With dead ends: 205 [2020-04-17 22:59:13,004 INFO L226 Difference]: Without dead ends: 203 [2020-04-17 22:59:13,005 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:59:13,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-04-17 22:59:13,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-04-17 22:59:13,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:59:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-04-17 22:59:13,009 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-04-17 22:59:13,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:13,009 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-04-17 22:59:13,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:13,009 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-04-17 22:59:13,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:13,010 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:13,010 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:13,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:13,210 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:13,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:13,211 INFO L82 PathProgramCache]: Analyzing trace with hash 896929423, now seen corresponding path program 96 times [2020-04-17 22:59:13,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:13,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187664820] [2020-04-17 22:59:13,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:13,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:13,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187664820] [2020-04-17 22:59:13,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006621004] [2020-04-17 22:59:13,283 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:13,339 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:59:13,339 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:13,340 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:13,340 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:13,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:13,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:13,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348433236] [2020-04-17 22:59:13,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:13,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:13,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:13,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:13,435 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-04-17 22:59:13,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:13,696 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-04-17 22:59:13,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:59:13,696 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:13,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:13,697 INFO L225 Difference]: With dead ends: 201 [2020-04-17 22:59:13,697 INFO L226 Difference]: Without dead ends: 199 [2020-04-17 22:59:13,697 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:59:13,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-04-17 22:59:13,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-04-17 22:59:13,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-04-17 22:59:13,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-04-17 22:59:13,700 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-04-17 22:59:13,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:13,700 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-04-17 22:59:13,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:13,701 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-04-17 22:59:13,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:13,701 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:13,701 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:13,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:13,902 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:13,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:13,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 97 times [2020-04-17 22:59:13,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:13,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837919901] [2020-04-17 22:59:13,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:13,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:13,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837919901] [2020-04-17 22:59:13,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741887321] [2020-04-17 22:59:13,971 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:14,014 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:14,014 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:14,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:14,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:14,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110334924] [2020-04-17 22:59:14,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:14,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:14,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:14,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:14,127 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-04-17 22:59:14,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:14,333 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-04-17 22:59:14,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:59:14,334 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:14,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:14,335 INFO L225 Difference]: With dead ends: 194 [2020-04-17 22:59:14,335 INFO L226 Difference]: Without dead ends: 192 [2020-04-17 22:59:14,335 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:59:14,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-04-17 22:59:14,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-04-17 22:59:14,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 22:59:14,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-04-17 22:59:14,338 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-04-17 22:59:14,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:14,339 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-04-17 22:59:14,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:14,339 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-04-17 22:59:14,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:14,339 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:14,339 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:14,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:14,540 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:14,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:14,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 98 times [2020-04-17 22:59:14,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:14,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553459032] [2020-04-17 22:59:14,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:14,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:14,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553459032] [2020-04-17 22:59:14,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720870312] [2020-04-17 22:59:14,655 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:14,693 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:59:14,693 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:14,694 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:14,694 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:15,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:15,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:15,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:15,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154811019] [2020-04-17 22:59:15,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:15,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:15,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:15,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:15,229 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-04-17 22:59:15,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:15,526 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-04-17 22:59:15,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 22:59:15,527 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:15,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:15,528 INFO L225 Difference]: With dead ends: 209 [2020-04-17 22:59:15,528 INFO L226 Difference]: Without dead ends: 207 [2020-04-17 22:59:15,528 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:15,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-04-17 22:59:15,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-04-17 22:59:15,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 22:59:15,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-04-17 22:59:15,532 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-04-17 22:59:15,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:15,532 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-04-17 22:59:15,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:15,532 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-04-17 22:59:15,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:15,532 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:15,532 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:15,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:15,733 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:15,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:15,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 99 times [2020-04-17 22:59:15,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:15,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084657082] [2020-04-17 22:59:15,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:15,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:15,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084657082] [2020-04-17 22:59:15,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734231506] [2020-04-17 22:59:15,798 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:15,841 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:59:15,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:15,842 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:15,843 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:15,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:15,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:15,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108384585] [2020-04-17 22:59:15,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:15,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:15,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:15,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:15,945 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-04-17 22:59:16,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:16,229 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-04-17 22:59:16,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 22:59:16,229 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:16,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:16,230 INFO L225 Difference]: With dead ends: 202 [2020-04-17 22:59:16,230 INFO L226 Difference]: Without dead ends: 200 [2020-04-17 22:59:16,231 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:59:16,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-04-17 22:59:16,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-04-17 22:59:16,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 22:59:16,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-04-17 22:59:16,234 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-04-17 22:59:16,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:16,234 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-04-17 22:59:16,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:16,234 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-04-17 22:59:16,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:16,235 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:16,235 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:16,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:16,435 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:16,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:16,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 100 times [2020-04-17 22:59:16,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:16,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283816903] [2020-04-17 22:59:16,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:16,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283816903] [2020-04-17 22:59:16,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373841956] [2020-04-17 22:59:16,510 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:16,551 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:59:16,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:16,552 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:16,552 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:16,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:16,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:16,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:16,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131308535] [2020-04-17 22:59:16,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:16,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:16,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:16,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:16,668 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-04-17 22:59:16,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:16,942 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-04-17 22:59:16,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:59:16,943 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:16,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:16,943 INFO L225 Difference]: With dead ends: 201 [2020-04-17 22:59:16,944 INFO L226 Difference]: Without dead ends: 199 [2020-04-17 22:59:16,944 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:59:16,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-04-17 22:59:16,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-04-17 22:59:16,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 22:59:16,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-04-17 22:59:16,947 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-04-17 22:59:16,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:16,948 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-04-17 22:59:16,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:16,948 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-04-17 22:59:16,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:16,948 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:16,949 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:17,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:17,152 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:17,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:17,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 101 times [2020-04-17 22:59:17,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:17,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452686130] [2020-04-17 22:59:17,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:17,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:17,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:17,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452686130] [2020-04-17 22:59:17,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116357541] [2020-04-17 22:59:17,221 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:17,265 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:59:17,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:17,266 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:17,267 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:17,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:17,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:17,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054828710] [2020-04-17 22:59:17,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:17,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:17,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:17,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:17,386 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-04-17 22:59:17,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:17,783 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-04-17 22:59:17,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 22:59:17,783 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:17,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:17,784 INFO L225 Difference]: With dead ends: 215 [2020-04-17 22:59:17,784 INFO L226 Difference]: Without dead ends: 213 [2020-04-17 22:59:17,784 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-04-17 22:59:17,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-04-17 22:59:17,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-04-17 22:59:17,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:59:17,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-04-17 22:59:17,786 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-04-17 22:59:17,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:17,787 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-04-17 22:59:17,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:17,787 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-04-17 22:59:17,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:17,787 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:17,787 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:17,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:17,988 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:17,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:17,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 102 times [2020-04-17 22:59:17,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:17,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835806779] [2020-04-17 22:59:17,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:17,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:18,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:18,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835806779] [2020-04-17 22:59:18,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272679448] [2020-04-17 22:59:18,058 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:18,101 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:59:18,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:18,101 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:18,102 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:18,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:18,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:18,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:18,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206276834] [2020-04-17 22:59:18,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:18,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:18,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:18,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:18,194 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-04-17 22:59:18,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:18,522 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-04-17 22:59:18,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:59:18,523 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:18,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:18,524 INFO L225 Difference]: With dead ends: 196 [2020-04-17 22:59:18,524 INFO L226 Difference]: Without dead ends: 194 [2020-04-17 22:59:18,525 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-04-17 22:59:18,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-04-17 22:59:18,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-04-17 22:59:18,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 22:59:18,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-04-17 22:59:18,528 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-04-17 22:59:18,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:18,528 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-04-17 22:59:18,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:18,529 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-04-17 22:59:18,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:18,529 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:18,529 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:18,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:18,731 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:18,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:18,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1555369361, now seen corresponding path program 103 times [2020-04-17 22:59:18,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:18,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077954719] [2020-04-17 22:59:18,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:18,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077954719] [2020-04-17 22:59:18,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045770312] [2020-04-17 22:59:18,800 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:18,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:18,844 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:18,844 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:18,918 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:18,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:18,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:18,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:18,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459330124] [2020-04-17 22:59:18,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:18,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:18,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:18,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:18,928 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-04-17 22:59:19,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:19,228 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-04-17 22:59:19,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:59:19,228 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:19,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:19,229 INFO L225 Difference]: With dead ends: 191 [2020-04-17 22:59:19,229 INFO L226 Difference]: Without dead ends: 186 [2020-04-17 22:59:19,230 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:59:19,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-04-17 22:59:19,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-04-17 22:59:19,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 22:59:19,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-04-17 22:59:19,235 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-04-17 22:59:19,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:19,236 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-04-17 22:59:19,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:19,236 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-04-17 22:59:19,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:19,237 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:19,237 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:19,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:19,445 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:19,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:19,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1555370322, now seen corresponding path program 104 times [2020-04-17 22:59:19,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:19,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714609110] [2020-04-17 22:59:19,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:19,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:19,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714609110] [2020-04-17 22:59:19,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984835049] [2020-04-17 22:59:19,549 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:19,618 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:59:19,619 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:19,620 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:19,621 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:19,755 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:19,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:19,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:19,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928678038] [2020-04-17 22:59:19,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:19,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:19,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:19,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:19,783 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-04-17 22:59:20,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:20,281 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-04-17 22:59:20,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 22:59:20,282 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:20,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:20,282 INFO L225 Difference]: With dead ends: 232 [2020-04-17 22:59:20,283 INFO L226 Difference]: Without dead ends: 227 [2020-04-17 22:59:20,283 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-04-17 22:59:20,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-04-17 22:59:20,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-04-17 22:59:20,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:59:20,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-04-17 22:59:20,287 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-04-17 22:59:20,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:20,287 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-04-17 22:59:20,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:20,287 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-04-17 22:59:20,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:20,287 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:20,287 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:20,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:20,488 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:20,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:20,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1555377793, now seen corresponding path program 105 times [2020-04-17 22:59:20,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:20,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116316219] [2020-04-17 22:59:20,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:20,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116316219] [2020-04-17 22:59:20,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272617947] [2020-04-17 22:59:20,556 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:20,597 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:59:20,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:20,598 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:20,599 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:20,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:20,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:20,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162563422] [2020-04-17 22:59:20,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:20,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:20,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:20,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:20,722 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-04-17 22:59:21,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:21,183 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-04-17 22:59:21,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 22:59:21,183 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:21,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:21,184 INFO L225 Difference]: With dead ends: 222 [2020-04-17 22:59:21,184 INFO L226 Difference]: Without dead ends: 220 [2020-04-17 22:59:21,185 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-04-17 22:59:21,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-04-17 22:59:21,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-04-17 22:59:21,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 22:59:21,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-04-17 22:59:21,188 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-04-17 22:59:21,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:21,188 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-04-17 22:59:21,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:21,188 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-04-17 22:59:21,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:21,188 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:21,189 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:21,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:21,389 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:21,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:21,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 106 times [2020-04-17 22:59:21,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:21,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131477301] [2020-04-17 22:59:21,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:21,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131477301] [2020-04-17 22:59:21,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006170650] [2020-04-17 22:59:21,468 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:21,513 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:59:21,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:21,514 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:21,514 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:22,041 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:22,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:22,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:22,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:22,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14051693] [2020-04-17 22:59:22,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:22,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:22,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:22,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=144, Unknown=1, NotChecked=0, Total=210 [2020-04-17 22:59:22,062 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-04-17 22:59:22,636 WARN L192 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2020-04-17 22:59:23,362 WARN L192 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2020-04-17 22:59:23,891 WARN L192 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-04-17 22:59:24,595 WARN L192 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-04-17 22:59:24,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:24,800 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-04-17 22:59:24,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 22:59:24,800 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:24,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:24,802 INFO L225 Difference]: With dead ends: 254 [2020-04-17 22:59:24,802 INFO L226 Difference]: Without dead ends: 246 [2020-04-17 22:59:24,802 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=345, Invalid=776, Unknown=1, NotChecked=0, Total=1122 [2020-04-17 22:59:24,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-04-17 22:59:24,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-04-17 22:59:24,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-04-17 22:59:24,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-04-17 22:59:24,806 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-04-17 22:59:24,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:24,807 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-04-17 22:59:24,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:24,807 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-04-17 22:59:24,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:24,807 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:24,808 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:25,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:25,012 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:25,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:25,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1555400113, now seen corresponding path program 107 times [2020-04-17 22:59:25,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:25,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100619574] [2020-04-17 22:59:25,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:25,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:25,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:25,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100619574] [2020-04-17 22:59:25,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272186031] [2020-04-17 22:59:25,080 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:25,123 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:59:25,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:25,124 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:25,125 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:25,213 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:25,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:25,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:59:25,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343527345] [2020-04-17 22:59:25,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:59:25,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:25,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:59:25,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=172, Unknown=1, NotChecked=0, Total=240 [2020-04-17 22:59:25,730 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 16 states. [2020-04-17 22:59:26,760 WARN L192 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-04-17 22:59:31,665 WARN L192 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-04-17 22:59:40,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:40,522 INFO L93 Difference]: Finished difference Result 253 states and 595 transitions. [2020-04-17 22:59:40,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 22:59:40,522 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 22:59:40,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:40,523 INFO L225 Difference]: With dead ends: 253 [2020-04-17 22:59:40,524 INFO L226 Difference]: Without dead ends: 245 [2020-04-17 22:59:40,524 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=430, Invalid=1044, Unknown=8, NotChecked=0, Total=1482 [2020-04-17 22:59:40,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-04-17 22:59:40,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 139. [2020-04-17 22:59:40,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 22:59:40,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-04-17 22:59:40,528 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-04-17 22:59:40,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:40,529 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-04-17 22:59:40,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:59:40,529 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-04-17 22:59:40,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:40,529 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:40,530 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:40,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:40,733 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:40,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:40,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1555608433, now seen corresponding path program 108 times [2020-04-17 22:59:40,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:40,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238167798] [2020-04-17 22:59:40,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:40,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:40,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:40,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238167798] [2020-04-17 22:59:40,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290684733] [2020-04-17 22:59:40,799 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:40,841 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:59:40,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:40,842 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:40,842 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:40,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:40,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:40,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:40,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268933676] [2020-04-17 22:59:40,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:40,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:40,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:40,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:40,947 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-04-17 22:59:41,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:41,301 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-04-17 22:59:41,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:59:41,301 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:41,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:41,302 INFO L225 Difference]: With dead ends: 208 [2020-04-17 22:59:41,302 INFO L226 Difference]: Without dead ends: 206 [2020-04-17 22:59:41,303 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-04-17 22:59:41,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-04-17 22:59:41,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-04-17 22:59:41,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 22:59:41,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-04-17 22:59:41,306 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-04-17 22:59:41,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:41,306 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-04-17 22:59:41,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:41,306 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-04-17 22:59:41,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:41,306 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:41,307 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:41,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:41,507 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:41,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:41,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 109 times [2020-04-17 22:59:41,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:41,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895088163] [2020-04-17 22:59:41,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:41,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:41,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895088163] [2020-04-17 22:59:41,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857628669] [2020-04-17 22:59:41,578 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:41,626 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:41,626 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:41,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:41,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:41,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:41,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839546611] [2020-04-17 22:59:41,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:41,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:41,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:41,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:41,718 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-04-17 22:59:42,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:42,167 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-04-17 22:59:42,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 22:59:42,167 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:42,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:42,168 INFO L225 Difference]: With dead ends: 215 [2020-04-17 22:59:42,168 INFO L226 Difference]: Without dead ends: 213 [2020-04-17 22:59:42,169 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-04-17 22:59:42,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-04-17 22:59:42,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-04-17 22:59:42,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-04-17 22:59:42,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-04-17 22:59:42,172 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-04-17 22:59:42,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:42,172 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-04-17 22:59:42,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:42,172 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-04-17 22:59:42,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:42,173 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:42,173 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:42,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:42,373 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:42,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:42,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 110 times [2020-04-17 22:59:42,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:42,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189900823] [2020-04-17 22:59:42,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:42,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:42,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:42,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189900823] [2020-04-17 22:59:42,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413705487] [2020-04-17 22:59:42,451 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:42,501 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:59:42,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:42,502 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:42,503 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:42,572 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:42,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:42,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:42,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431669177] [2020-04-17 22:59:42,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:42,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:42,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:42,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:42,580 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-04-17 22:59:43,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:43,067 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-04-17 22:59:43,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 22:59:43,068 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:43,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:43,069 INFO L225 Difference]: With dead ends: 236 [2020-04-17 22:59:43,069 INFO L226 Difference]: Without dead ends: 228 [2020-04-17 22:59:43,069 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 22:59:43,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-04-17 22:59:43,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-04-17 22:59:43,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-04-17 22:59:43,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-04-17 22:59:43,072 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-04-17 22:59:43,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:43,073 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-04-17 22:59:43,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:43,073 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-04-17 22:59:43,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:43,073 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:43,073 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:43,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:43,274 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:43,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:43,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1556293843, now seen corresponding path program 111 times [2020-04-17 22:59:43,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:43,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432711819] [2020-04-17 22:59:43,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:43,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432711819] [2020-04-17 22:59:43,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791413029] [2020-04-17 22:59:43,341 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:43,383 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:59:43,384 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:43,384 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:43,385 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:43,488 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:43,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:43,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:43,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:43,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88325692] [2020-04-17 22:59:43,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:43,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:43,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:43,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:43,496 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-04-17 22:59:44,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:44,024 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-04-17 22:59:44,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 22:59:44,025 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:44,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:44,025 INFO L225 Difference]: With dead ends: 241 [2020-04-17 22:59:44,026 INFO L226 Difference]: Without dead ends: 233 [2020-04-17 22:59:44,026 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 22:59:44,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-04-17 22:59:44,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-04-17 22:59:44,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-04-17 22:59:44,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-04-17 22:59:44,030 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-04-17 22:59:44,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:44,030 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-04-17 22:59:44,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:44,030 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-04-17 22:59:44,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:44,030 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:44,030 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:44,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:44,231 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:44,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:44,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1556322673, now seen corresponding path program 112 times [2020-04-17 22:59:44,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:44,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10690992] [2020-04-17 22:59:44,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:44,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10690992] [2020-04-17 22:59:44,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719289672] [2020-04-17 22:59:44,303 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:44,349 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:59:44,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:44,351 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:44,351 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:44,434 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:44,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:44,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:44,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:44,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894201200] [2020-04-17 22:59:44,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:44,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:44,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:44,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:44,444 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-04-17 22:59:44,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:44,964 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-04-17 22:59:44,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 22:59:44,965 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:44,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:44,966 INFO L225 Difference]: With dead ends: 232 [2020-04-17 22:59:44,966 INFO L226 Difference]: Without dead ends: 224 [2020-04-17 22:59:44,967 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 22:59:44,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-04-17 22:59:44,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-04-17 22:59:44,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-04-17 22:59:44,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-04-17 22:59:44,971 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-04-17 22:59:44,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:44,971 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-04-17 22:59:44,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:44,972 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-04-17 22:59:44,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:44,972 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:44,972 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:45,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:45,176 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:45,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:45,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1725446472, now seen corresponding path program 6 times [2020-04-17 22:59:45,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:45,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782590592] [2020-04-17 22:59:45,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:45,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:45,304 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-17 22:59:45,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782590592] [2020-04-17 22:59:45,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900755940] [2020-04-17 22:59:45,305 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:45,347 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 22:59:45,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:45,348 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:59:45,348 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:45,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-17 22:59:45,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 13 [2020-04-17 22:59:45,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143545286] [2020-04-17 22:59:45,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 22:59:45,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:45,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 22:59:45,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:59:45,416 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 8 states. [2020-04-17 22:59:45,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:45,437 INFO L93 Difference]: Finished difference Result 195 states and 513 transitions. [2020-04-17 22:59:45,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:59:45,437 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-04-17 22:59:45,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:45,438 INFO L225 Difference]: With dead ends: 195 [2020-04-17 22:59:45,438 INFO L226 Difference]: Without dead ends: 188 [2020-04-17 22:59:45,438 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:59:45,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-04-17 22:59:45,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2020-04-17 22:59:45,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-04-17 22:59:45,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 500 transitions. [2020-04-17 22:59:45,442 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 500 transitions. Word has length 13 [2020-04-17 22:59:45,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:45,442 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 500 transitions. [2020-04-17 22:59:45,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 22:59:45,442 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 500 transitions. [2020-04-17 22:59:45,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:45,443 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:45,443 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:45,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:45,643 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:45,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:45,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 21 times [2020-04-17 22:59:45,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:45,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365012879] [2020-04-17 22:59:45,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:45,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-17 22:59:45,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365012879] [2020-04-17 22:59:45,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453166378] [2020-04-17 22:59:45,788 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:45,860 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 22:59:45,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:45,861 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:59:45,862 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:45,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-17 22:59:45,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 13 [2020-04-17 22:59:45,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047871155] [2020-04-17 22:59:45,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 22:59:45,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:45,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 22:59:45,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:59:45,938 INFO L87 Difference]: Start difference. First operand 188 states and 500 transitions. Second operand 8 states. [2020-04-17 22:59:45,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:45,969 INFO L93 Difference]: Finished difference Result 263 states and 678 transitions. [2020-04-17 22:59:45,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:59:45,970 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-04-17 22:59:45,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:45,971 INFO L225 Difference]: With dead ends: 263 [2020-04-17 22:59:45,971 INFO L226 Difference]: Without dead ends: 240 [2020-04-17 22:59:45,972 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:59:45,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-04-17 22:59:45,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2020-04-17 22:59:45,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-04-17 22:59:45,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 626 transitions. [2020-04-17 22:59:45,978 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 626 transitions. Word has length 13 [2020-04-17 22:59:45,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:45,979 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 626 transitions. [2020-04-17 22:59:45,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 22:59:45,979 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 626 transitions. [2020-04-17 22:59:45,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:45,980 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:45,980 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:46,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:46,185 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:46,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:46,185 INFO L82 PathProgramCache]: Analyzing trace with hash 2094057644, now seen corresponding path program 113 times [2020-04-17 22:59:46,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:46,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912367437] [2020-04-17 22:59:46,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:46,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912367437] [2020-04-17 22:59:46,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652162483] [2020-04-17 22:59:46,333 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:46,402 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:59:46,403 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:46,404 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:46,405 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:46,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:46,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:46,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177175661] [2020-04-17 22:59:46,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:46,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:46,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:46,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:46,602 INFO L87 Difference]: Start difference. First operand 240 states and 626 transitions. Second operand 17 states. [2020-04-17 22:59:46,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:46,672 INFO L93 Difference]: Finished difference Result 275 states and 692 transitions. [2020-04-17 22:59:46,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:59:46,672 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:46,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:46,673 INFO L225 Difference]: With dead ends: 275 [2020-04-17 22:59:46,673 INFO L226 Difference]: Without dead ends: 273 [2020-04-17 22:59:46,673 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:46,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-04-17 22:59:46,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 250. [2020-04-17 22:59:46,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-04-17 22:59:46,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 654 transitions. [2020-04-17 22:59:46,678 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 654 transitions. Word has length 14 [2020-04-17 22:59:46,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:46,678 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 654 transitions. [2020-04-17 22:59:46,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:46,678 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 654 transitions. [2020-04-17 22:59:46,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:46,679 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:46,679 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:46,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:46,883 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:46,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:46,883 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 114 times [2020-04-17 22:59:46,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:46,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677241563] [2020-04-17 22:59:46,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:46,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677241563] [2020-04-17 22:59:46,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30874514] [2020-04-17 22:59:46,985 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:47,027 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:59:47,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:47,028 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:47,029 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:47,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:47,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:47,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202195121] [2020-04-17 22:59:47,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:47,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:47,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:47,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:47,163 INFO L87 Difference]: Start difference. First operand 250 states and 654 transitions. Second operand 17 states. [2020-04-17 22:59:47,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:47,385 INFO L93 Difference]: Finished difference Result 295 states and 735 transitions. [2020-04-17 22:59:47,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:59:47,386 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:47,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:47,387 INFO L225 Difference]: With dead ends: 295 [2020-04-17 22:59:47,387 INFO L226 Difference]: Without dead ends: 292 [2020-04-17 22:59:47,388 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:59:47,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-04-17 22:59:47,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 251. [2020-04-17 22:59:47,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-04-17 22:59:47,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 657 transitions. [2020-04-17 22:59:47,392 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 657 transitions. Word has length 14 [2020-04-17 22:59:47,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:47,393 INFO L479 AbstractCegarLoop]: Abstraction has 251 states and 657 transitions. [2020-04-17 22:59:47,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:47,393 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 657 transitions. [2020-04-17 22:59:47,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:47,393 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:47,393 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:47,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:47,594 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:47,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:47,594 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 115 times [2020-04-17 22:59:47,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:47,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653442282] [2020-04-17 22:59:47,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:47,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:47,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653442282] [2020-04-17 22:59:47,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859565105] [2020-04-17 22:59:47,688 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:47,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:47,732 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:47,732 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:48,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:48,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:48,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:48,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847836980] [2020-04-17 22:59:48,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:48,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:48,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:48,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=183, Unknown=1, NotChecked=0, Total=272 [2020-04-17 22:59:48,925 INFO L87 Difference]: Start difference. First operand 251 states and 657 transitions. Second operand 17 states. [2020-04-17 22:59:49,622 WARN L192 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-04-17 22:59:49,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:49,639 INFO L93 Difference]: Finished difference Result 320 states and 793 transitions. [2020-04-17 22:59:49,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:59:49,639 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:49,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:49,641 INFO L225 Difference]: With dead ends: 320 [2020-04-17 22:59:49,642 INFO L226 Difference]: Without dead ends: 316 [2020-04-17 22:59:49,642 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=174, Invalid=331, Unknown=1, NotChecked=0, Total=506 [2020-04-17 22:59:49,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-04-17 22:59:49,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 253. [2020-04-17 22:59:49,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-04-17 22:59:49,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 663 transitions. [2020-04-17 22:59:49,648 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 663 transitions. Word has length 14 [2020-04-17 22:59:49,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:49,648 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 663 transitions. [2020-04-17 22:59:49,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:49,648 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 663 transitions. [2020-04-17 22:59:49,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:49,649 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:49,649 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:49,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:49,852 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:49,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:49,853 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 116 times [2020-04-17 22:59:49,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:49,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685013700] [2020-04-17 22:59:49,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:49,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:49,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685013700] [2020-04-17 22:59:49,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888532552] [2020-04-17 22:59:49,982 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:50,027 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:59:50,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:50,028 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:50,029 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:51,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:51,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:51,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:51,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132723538] [2020-04-17 22:59:51,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:51,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:51,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:51,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:51,324 INFO L87 Difference]: Start difference. First operand 253 states and 663 transitions. Second operand 17 states. [2020-04-17 22:59:51,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:51,646 INFO L93 Difference]: Finished difference Result 316 states and 781 transitions. [2020-04-17 22:59:51,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:59:51,646 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:51,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:51,647 INFO L225 Difference]: With dead ends: 316 [2020-04-17 22:59:51,647 INFO L226 Difference]: Without dead ends: 313 [2020-04-17 22:59:51,648 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:51,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-04-17 22:59:51,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 255. [2020-04-17 22:59:51,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-04-17 22:59:51,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 669 transitions. [2020-04-17 22:59:51,654 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 669 transitions. Word has length 14 [2020-04-17 22:59:51,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:51,654 INFO L479 AbstractCegarLoop]: Abstraction has 255 states and 669 transitions. [2020-04-17 22:59:51,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:51,654 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 669 transitions. [2020-04-17 22:59:51,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:51,655 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:51,655 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:51,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:51,858 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:51,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:51,859 INFO L82 PathProgramCache]: Analyzing trace with hash 2094982126, now seen corresponding path program 117 times [2020-04-17 22:59:51,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:51,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911400512] [2020-04-17 22:59:51,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:51,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911400512] [2020-04-17 22:59:51,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6941731] [2020-04-17 22:59:51,981 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:52,026 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:59:52,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:52,027 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:52,028 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:52,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:52,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:52,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:52,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667823100] [2020-04-17 22:59:52,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:52,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:52,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:52,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:52,207 INFO L87 Difference]: Start difference. First operand 255 states and 669 transitions. Second operand 17 states. [2020-04-17 22:59:52,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:52,485 INFO L93 Difference]: Finished difference Result 342 states and 843 transitions. [2020-04-17 22:59:52,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 22:59:52,486 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:52,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:52,487 INFO L225 Difference]: With dead ends: 342 [2020-04-17 22:59:52,487 INFO L226 Difference]: Without dead ends: 337 [2020-04-17 22:59:52,487 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:52,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-04-17 22:59:52,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 256. [2020-04-17 22:59:52,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-04-17 22:59:52,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 672 transitions. [2020-04-17 22:59:52,493 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 672 transitions. Word has length 14 [2020-04-17 22:59:52,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:52,493 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 672 transitions. [2020-04-17 22:59:52,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:52,493 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 672 transitions. [2020-04-17 22:59:52,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:52,494 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:52,494 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:52,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:52,696 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:52,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:52,696 INFO L82 PathProgramCache]: Analyzing trace with hash 2095010956, now seen corresponding path program 118 times [2020-04-17 22:59:52,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:52,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542053911] [2020-04-17 22:59:52,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:52,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:52,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542053911] [2020-04-17 22:59:52,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121763034] [2020-04-17 22:59:52,822 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:52,865 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:59:52,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:52,866 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:52,866 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:53,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:53,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:53,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:53,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246705583] [2020-04-17 22:59:53,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:53,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:53,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:53,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:53,040 INFO L87 Difference]: Start difference. First operand 256 states and 672 transitions. Second operand 17 states. [2020-04-17 22:59:53,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:53,339 INFO L93 Difference]: Finished difference Result 331 states and 819 transitions. [2020-04-17 22:59:53,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 22:59:53,339 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:53,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:53,340 INFO L225 Difference]: With dead ends: 331 [2020-04-17 22:59:53,340 INFO L226 Difference]: Without dead ends: 327 [2020-04-17 22:59:53,341 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:53,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-04-17 22:59:53,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 256. [2020-04-17 22:59:53,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-04-17 22:59:53,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 672 transitions. [2020-04-17 22:59:53,346 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 672 transitions. Word has length 14 [2020-04-17 22:59:53,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:53,346 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 672 transitions. [2020-04-17 22:59:53,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:53,346 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 672 transitions. [2020-04-17 22:59:53,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:53,347 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:53,347 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:53,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:53,550 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:53,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:53,551 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 119 times [2020-04-17 22:59:53,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:53,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344963546] [2020-04-17 22:59:53,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:53,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344963546] [2020-04-17 22:59:53,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378391152] [2020-04-17 22:59:53,639 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:53,683 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:59:53,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:53,684 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:53,684 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:53,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:53,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:53,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399121530] [2020-04-17 22:59:53,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:53,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:53,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:53,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:53,817 INFO L87 Difference]: Start difference. First operand 256 states and 672 transitions. Second operand 17 states. [2020-04-17 22:59:54,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:54,110 INFO L93 Difference]: Finished difference Result 321 states and 792 transitions. [2020-04-17 22:59:54,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:59:54,111 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:54,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:54,112 INFO L225 Difference]: With dead ends: 321 [2020-04-17 22:59:54,112 INFO L226 Difference]: Without dead ends: 318 [2020-04-17 22:59:54,112 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-04-17 22:59:54,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-04-17 22:59:54,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 259. [2020-04-17 22:59:54,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-04-17 22:59:54,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 681 transitions. [2020-04-17 22:59:54,117 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 681 transitions. Word has length 14 [2020-04-17 22:59:54,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:54,118 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 681 transitions. [2020-04-17 22:59:54,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:54,118 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 681 transitions. [2020-04-17 22:59:54,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:54,118 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:54,118 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:54,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:54,319 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:54,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:54,319 INFO L82 PathProgramCache]: Analyzing trace with hash 2122687756, now seen corresponding path program 120 times [2020-04-17 22:59:54,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:54,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034035435] [2020-04-17 22:59:54,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:54,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:54,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034035435] [2020-04-17 22:59:54,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138148951] [2020-04-17 22:59:54,410 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:54,451 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:59:54,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:54,452 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:54,453 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:55,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:55,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:55,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:55,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245704579] [2020-04-17 22:59:55,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:55,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:55,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:55,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:55,381 INFO L87 Difference]: Start difference. First operand 259 states and 681 transitions. Second operand 17 states. [2020-04-17 22:59:55,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:55,688 INFO L93 Difference]: Finished difference Result 348 states and 857 transitions. [2020-04-17 22:59:55,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:59:55,688 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:55,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:55,689 INFO L225 Difference]: With dead ends: 348 [2020-04-17 22:59:55,689 INFO L226 Difference]: Without dead ends: 343 [2020-04-17 22:59:55,690 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-04-17 22:59:55,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-04-17 22:59:55,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 260. [2020-04-17 22:59:55,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-04-17 22:59:55,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 684 transitions. [2020-04-17 22:59:55,695 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 684 transitions. Word has length 14 [2020-04-17 22:59:55,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:55,696 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 684 transitions. [2020-04-17 22:59:55,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:55,696 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 684 transitions. [2020-04-17 22:59:55,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:55,696 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:55,696 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:55,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:55,900 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:55,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:55,900 INFO L82 PathProgramCache]: Analyzing trace with hash 2122716586, now seen corresponding path program 121 times [2020-04-17 22:59:55,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:55,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3856469] [2020-04-17 22:59:55,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:55,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3856469] [2020-04-17 22:59:55,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27868369] [2020-04-17 22:59:55,994 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:56,036 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:56,036 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:56,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:56,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:56,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091578186] [2020-04-17 22:59:56,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:56,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:56,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:56,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:56,152 INFO L87 Difference]: Start difference. First operand 260 states and 684 transitions. Second operand 17 states. [2020-04-17 22:59:56,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:56,431 INFO L93 Difference]: Finished difference Result 349 states and 864 transitions. [2020-04-17 22:59:56,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:59:56,431 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:56,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:56,432 INFO L225 Difference]: With dead ends: 349 [2020-04-17 22:59:56,432 INFO L226 Difference]: Without dead ends: 344 [2020-04-17 22:59:56,433 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:59:56,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-04-17 22:59:56,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 259. [2020-04-17 22:59:56,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-04-17 22:59:56,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 681 transitions. [2020-04-17 22:59:56,438 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 681 transitions. Word has length 14 [2020-04-17 22:59:56,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:56,438 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 681 transitions. [2020-04-17 22:59:56,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:56,438 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 681 transitions. [2020-04-17 22:59:56,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:56,438 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:56,439 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:56,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:56,639 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:56,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:56,640 INFO L82 PathProgramCache]: Analyzing trace with hash 2123641068, now seen corresponding path program 122 times [2020-04-17 22:59:56,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:56,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461528919] [2020-04-17 22:59:56,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:56,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461528919] [2020-04-17 22:59:56,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600020725] [2020-04-17 22:59:56,761 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:56,808 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:59:56,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:56,808 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:56,809 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:56,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:56,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:56,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496288321] [2020-04-17 22:59:56,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:56,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:56,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:56,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:56,930 INFO L87 Difference]: Start difference. First operand 259 states and 681 transitions. Second operand 17 states. [2020-04-17 22:59:57,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:57,161 INFO L93 Difference]: Finished difference Result 332 states and 822 transitions. [2020-04-17 22:59:57,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:59:57,162 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:57,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:57,163 INFO L225 Difference]: With dead ends: 332 [2020-04-17 22:59:57,163 INFO L226 Difference]: Without dead ends: 314 [2020-04-17 22:59:57,163 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:57,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-04-17 22:59:57,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 260. [2020-04-17 22:59:57,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-04-17 22:59:57,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 677 transitions. [2020-04-17 22:59:57,167 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 677 transitions. Word has length 14 [2020-04-17 22:59:57,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:57,167 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 677 transitions. [2020-04-17 22:59:57,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:57,167 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 677 transitions. [2020-04-17 22:59:57,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:57,168 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:57,168 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:57,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:57,368 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:57,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:57,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 123 times [2020-04-17 22:59:57,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:57,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486136417] [2020-04-17 22:59:57,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:57,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486136417] [2020-04-17 22:59:57,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646049915] [2020-04-17 22:59:57,476 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:57,518 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 22:59:57,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:57,519 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:57,519 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:57,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:57,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:57,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530364549] [2020-04-17 22:59:57,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:57,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:57,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:57,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:57,646 INFO L87 Difference]: Start difference. First operand 260 states and 677 transitions. Second operand 17 states. [2020-04-17 22:59:57,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:57,897 INFO L93 Difference]: Finished difference Result 315 states and 779 transitions. [2020-04-17 22:59:57,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:59:57,897 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:57,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:57,898 INFO L225 Difference]: With dead ends: 315 [2020-04-17 22:59:57,898 INFO L226 Difference]: Without dead ends: 312 [2020-04-17 22:59:57,899 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:57,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-04-17 22:59:57,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 265. [2020-04-17 22:59:57,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-04-17 22:59:57,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 690 transitions. [2020-04-17 22:59:57,904 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 690 transitions. Word has length 14 [2020-04-17 22:59:57,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:57,904 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 690 transitions. [2020-04-17 22:59:57,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:57,904 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 690 transitions. [2020-04-17 22:59:57,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:57,905 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:57,905 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:58,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:58,105 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:58,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:58,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405010, now seen corresponding path program 124 times [2020-04-17 22:59:58,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:58,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46610638] [2020-04-17 22:59:58,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:58,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:58,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46610638] [2020-04-17 22:59:58,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356505407] [2020-04-17 22:59:58,209 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:58,251 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:59:58,251 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:58,252 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:58,252 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:58,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:58,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:58,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22824904] [2020-04-17 22:59:58,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:58,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:58,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:58,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:58,792 INFO L87 Difference]: Start difference. First operand 265 states and 690 transitions. Second operand 17 states. [2020-04-17 22:59:59,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:59,055 INFO L93 Difference]: Finished difference Result 334 states and 821 transitions. [2020-04-17 22:59:59,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 22:59:59,056 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:59,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:59,057 INFO L225 Difference]: With dead ends: 334 [2020-04-17 22:59:59,057 INFO L226 Difference]: Without dead ends: 330 [2020-04-17 22:59:59,057 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:59,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-04-17 22:59:59,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-04-17 22:59:59,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-04-17 22:59:59,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 687 transitions. [2020-04-17 22:59:59,064 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 687 transitions. Word has length 14 [2020-04-17 22:59:59,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:59,064 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 687 transitions. [2020-04-17 22:59:59,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:59,064 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 687 transitions. [2020-04-17 22:59:59,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:59,065 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:59,065 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:59,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:59,268 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:59,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:59,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1313376180, now seen corresponding path program 125 times [2020-04-17 22:59:59,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:59,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12841228] [2020-04-17 22:59:59,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:59,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:59,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:59,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12841228] [2020-04-17 22:59:59,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405340072] [2020-04-17 22:59:59,366 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:59,407 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:59:59,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:59,408 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:59,408 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:59,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:59,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:59,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680935087] [2020-04-17 22:59:59,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:59,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:59,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:59,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=190, Unknown=1, NotChecked=0, Total=272 [2020-04-17 22:59:59,971 INFO L87 Difference]: Start difference. First operand 264 states and 687 transitions. Second operand 17 states. [2020-04-17 23:00:01,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:01,240 INFO L93 Difference]: Finished difference Result 351 states and 859 transitions. [2020-04-17 23:00:01,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:00:01,241 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:01,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:01,242 INFO L225 Difference]: With dead ends: 351 [2020-04-17 23:00:01,242 INFO L226 Difference]: Without dead ends: 346 [2020-04-17 23:00:01,242 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=197, Invalid=401, Unknown=2, NotChecked=0, Total=600 [2020-04-17 23:00:01,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-04-17 23:00:01,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 269. [2020-04-17 23:00:01,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-04-17 23:00:01,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 700 transitions. [2020-04-17 23:00:01,247 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 700 transitions. Word has length 14 [2020-04-17 23:00:01,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:01,247 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 700 transitions. [2020-04-17 23:00:01,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:01,247 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 700 transitions. [2020-04-17 23:00:01,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:01,247 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:01,248 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:01,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:01,448 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:01,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:01,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1312481489, now seen corresponding path program 126 times [2020-04-17 23:00:01,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:01,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230529099] [2020-04-17 23:00:01,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:01,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230529099] [2020-04-17 23:00:01,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013942778] [2020-04-17 23:00:01,633 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:01,691 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:00:01,691 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:01,692 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:01,693 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:01,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:01,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:01,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:01,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27484211] [2020-04-17 23:00:01,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:01,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:01,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:01,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:01,853 INFO L87 Difference]: Start difference. First operand 269 states and 700 transitions. Second operand 17 states. [2020-04-17 23:00:02,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:02,112 INFO L93 Difference]: Finished difference Result 357 states and 870 transitions. [2020-04-17 23:00:02,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:00:02,112 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:02,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:02,113 INFO L225 Difference]: With dead ends: 357 [2020-04-17 23:00:02,113 INFO L226 Difference]: Without dead ends: 339 [2020-04-17 23:00:02,114 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:00:02,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-04-17 23:00:02,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 269. [2020-04-17 23:00:02,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-04-17 23:00:02,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 696 transitions. [2020-04-17 23:00:02,118 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 696 transitions. Word has length 14 [2020-04-17 23:00:02,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:02,119 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 696 transitions. [2020-04-17 23:00:02,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:02,119 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 696 transitions. [2020-04-17 23:00:02,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:02,119 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:02,120 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:02,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:02,322 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:02,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:02,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1284776820, now seen corresponding path program 127 times [2020-04-17 23:00:02,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:02,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341575149] [2020-04-17 23:00:02,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:02,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:02,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341575149] [2020-04-17 23:00:02,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175797236] [2020-04-17 23:00:02,484 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:02,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:02,547 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:02,548 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:02,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:02,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:02,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:02,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053672692] [2020-04-17 23:00:02,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:02,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:02,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:02,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:02,773 INFO L87 Difference]: Start difference. First operand 269 states and 696 transitions. Second operand 17 states. [2020-04-17 23:00:03,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:03,126 INFO L93 Difference]: Finished difference Result 332 states and 820 transitions. [2020-04-17 23:00:03,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 23:00:03,126 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:03,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:03,127 INFO L225 Difference]: With dead ends: 332 [2020-04-17 23:00:03,127 INFO L226 Difference]: Without dead ends: 327 [2020-04-17 23:00:03,127 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:00:03,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-04-17 23:00:03,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 266. [2020-04-17 23:00:03,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-04-17 23:00:03,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 689 transitions. [2020-04-17 23:00:03,132 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 689 transitions. Word has length 14 [2020-04-17 23:00:03,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:03,132 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 689 transitions. [2020-04-17 23:00:03,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:03,133 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 689 transitions. [2020-04-17 23:00:03,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:03,133 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:03,133 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:03,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:03,336 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:03,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:03,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1283823508, now seen corresponding path program 128 times [2020-04-17 23:00:03,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:03,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290192043] [2020-04-17 23:00:03,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:03,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:03,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290192043] [2020-04-17 23:00:03,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792955346] [2020-04-17 23:00:03,478 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:03,521 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:00:03,522 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:03,522 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:03,523 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:03,680 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:03,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:03,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:03,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427794934] [2020-04-17 23:00:03,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:03,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:03,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:03,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:03,681 INFO L87 Difference]: Start difference. First operand 266 states and 689 transitions. Second operand 17 states. [2020-04-17 23:00:03,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:03,837 INFO L93 Difference]: Finished difference Result 322 states and 792 transitions. [2020-04-17 23:00:03,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 23:00:03,837 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:03,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:03,838 INFO L225 Difference]: With dead ends: 322 [2020-04-17 23:00:03,838 INFO L226 Difference]: Without dead ends: 309 [2020-04-17 23:00:03,839 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:00:03,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-04-17 23:00:03,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 268. [2020-04-17 23:00:03,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-04-17 23:00:03,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 691 transitions. [2020-04-17 23:00:03,844 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 691 transitions. Word has length 14 [2020-04-17 23:00:03,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:03,844 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 691 transitions. [2020-04-17 23:00:03,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:03,844 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 691 transitions. [2020-04-17 23:00:03,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:03,845 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:03,845 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:04,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:04,046 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:04,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:04,046 INFO L82 PathProgramCache]: Analyzing trace with hash 291274206, now seen corresponding path program 129 times [2020-04-17 23:00:04,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:04,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382224230] [2020-04-17 23:00:04,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:04,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:04,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:04,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382224230] [2020-04-17 23:00:04,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874716619] [2020-04-17 23:00:04,174 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:04,217 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:00:04,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:04,218 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:04,219 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:04,347 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:04,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:04,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:04,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849212676] [2020-04-17 23:00:04,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:04,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:04,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:04,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:04,349 INFO L87 Difference]: Start difference. First operand 268 states and 691 transitions. Second operand 17 states. [2020-04-17 23:00:04,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:04,425 INFO L93 Difference]: Finished difference Result 305 states and 753 transitions. [2020-04-17 23:00:04,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 23:00:04,425 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:04,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:04,426 INFO L225 Difference]: With dead ends: 305 [2020-04-17 23:00:04,426 INFO L226 Difference]: Without dead ends: 303 [2020-04-17 23:00:04,426 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:00:04,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-04-17 23:00:04,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 274. [2020-04-17 23:00:04,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-04-17 23:00:04,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 709 transitions. [2020-04-17 23:00:04,432 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 709 transitions. Word has length 14 [2020-04-17 23:00:04,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:04,432 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 709 transitions. [2020-04-17 23:00:04,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:04,432 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 709 transitions. [2020-04-17 23:00:04,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:04,433 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:04,433 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:04,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:04,636 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:04,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:04,636 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 130 times [2020-04-17 23:00:04,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:04,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682233836] [2020-04-17 23:00:04,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:04,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:04,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682233836] [2020-04-17 23:00:04,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95211518] [2020-04-17 23:00:04,756 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:04,801 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:00:04,801 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:04,802 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:04,802 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:04,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:04,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:04,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290085085] [2020-04-17 23:00:04,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:04,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:04,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:04,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:04,937 INFO L87 Difference]: Start difference. First operand 274 states and 709 transitions. Second operand 17 states. [2020-04-17 23:00:05,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:05,149 INFO L93 Difference]: Finished difference Result 325 states and 802 transitions. [2020-04-17 23:00:05,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:00:05,156 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:05,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:05,157 INFO L225 Difference]: With dead ends: 325 [2020-04-17 23:00:05,157 INFO L226 Difference]: Without dead ends: 322 [2020-04-17 23:00:05,157 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:00:05,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-04-17 23:00:05,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 272. [2020-04-17 23:00:05,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-04-17 23:00:05,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-04-17 23:00:05,161 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-04-17 23:00:05,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:05,161 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-04-17 23:00:05,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:05,162 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-04-17 23:00:05,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:05,162 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:05,162 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:05,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:05,363 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:05,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:05,364 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 131 times [2020-04-17 23:00:05,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:05,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851454553] [2020-04-17 23:00:05,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:05,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:05,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:05,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851454553] [2020-04-17 23:00:05,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601969133] [2020-04-17 23:00:05,468 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:05,509 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 23:00:05,509 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:05,509 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:05,510 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:06,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:06,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:06,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:06,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131805492] [2020-04-17 23:00:06,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:06,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:06,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:06,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:06,497 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-04-17 23:00:06,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:06,834 INFO L93 Difference]: Finished difference Result 348 states and 857 transitions. [2020-04-17 23:00:06,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:00:06,834 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:06,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:06,835 INFO L225 Difference]: With dead ends: 348 [2020-04-17 23:00:06,835 INFO L226 Difference]: Without dead ends: 344 [2020-04-17 23:00:06,836 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:00:06,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-04-17 23:00:06,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 270. [2020-04-17 23:00:06,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-04-17 23:00:06,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 697 transitions. [2020-04-17 23:00:06,841 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 697 transitions. Word has length 14 [2020-04-17 23:00:06,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:06,841 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 697 transitions. [2020-04-17 23:00:06,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:06,841 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 697 transitions. [2020-04-17 23:00:06,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:06,841 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:06,842 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:07,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:07,042 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:07,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:07,043 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 132 times [2020-04-17 23:00:07,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:07,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820466161] [2020-04-17 23:00:07,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:07,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820466161] [2020-04-17 23:00:07,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103270443] [2020-04-17 23:00:07,136 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:07,179 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:00:07,180 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:07,181 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:07,181 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:13,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:13,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:13,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:13,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156431325] [2020-04-17 23:00:13,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:13,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:13,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:13,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:13,395 INFO L87 Difference]: Start difference. First operand 270 states and 697 transitions. Second operand 17 states. [2020-04-17 23:00:13,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:13,843 INFO L93 Difference]: Finished difference Result 338 states and 827 transitions. [2020-04-17 23:00:13,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:00:13,844 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:13,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:13,845 INFO L225 Difference]: With dead ends: 338 [2020-04-17 23:00:13,845 INFO L226 Difference]: Without dead ends: 335 [2020-04-17 23:00:13,845 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-04-17 23:00:13,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-04-17 23:00:13,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 272. [2020-04-17 23:00:13,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-04-17 23:00:13,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-04-17 23:00:13,850 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-04-17 23:00:13,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:13,851 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-04-17 23:00:13,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:13,851 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-04-17 23:00:13,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:13,851 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:13,851 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:14,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:14,052 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:14,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:14,053 INFO L82 PathProgramCache]: Analyzing trace with hash 292198688, now seen corresponding path program 133 times [2020-04-17 23:00:14,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:14,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320433469] [2020-04-17 23:00:14,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:14,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320433469] [2020-04-17 23:00:14,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391345044] [2020-04-17 23:00:14,149 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:14,192 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:14,193 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:24,536 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 22 [2020-04-17 23:00:24,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:24,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:24,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 23:00:24,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965845249] [2020-04-17 23:00:24,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:00:24,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:24,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:00:24,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=220, Unknown=4, NotChecked=0, Total=306 [2020-04-17 23:00:24,539 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 18 states. [2020-04-17 23:00:27,419 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 26 [2020-04-17 23:00:31,626 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2020-04-17 23:00:38,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:38,073 INFO L93 Difference]: Finished difference Result 388 states and 942 transitions. [2020-04-17 23:00:38,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:00:38,073 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 23:00:38,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:38,074 INFO L225 Difference]: With dead ends: 388 [2020-04-17 23:00:38,074 INFO L226 Difference]: Without dead ends: 383 [2020-04-17 23:00:38,074 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=226, Invalid=472, Unknown=4, NotChecked=0, Total=702 [2020-04-17 23:00:38,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-04-17 23:00:38,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 272. [2020-04-17 23:00:38,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-04-17 23:00:38,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-04-17 23:00:38,079 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-04-17 23:00:38,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:38,079 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-04-17 23:00:38,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:00:38,080 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-04-17 23:00:38,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:38,080 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:38,080 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:38,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:38,284 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:38,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:38,284 INFO L82 PathProgramCache]: Analyzing trace with hash 292227518, now seen corresponding path program 134 times [2020-04-17 23:00:38,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:38,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013527143] [2020-04-17 23:00:38,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:38,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013527143] [2020-04-17 23:00:38,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241805284] [2020-04-17 23:00:38,388 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:38,430 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:00:38,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:38,430 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:38,431 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:38,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:38,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:38,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013458954] [2020-04-17 23:00:38,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:38,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:38,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:38,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:38,575 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-04-17 23:00:38,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:38,958 INFO L93 Difference]: Finished difference Result 352 states and 862 transitions. [2020-04-17 23:00:38,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:00:38,958 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:38,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:38,959 INFO L225 Difference]: With dead ends: 352 [2020-04-17 23:00:38,960 INFO L226 Difference]: Without dead ends: 348 [2020-04-17 23:00:38,960 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-04-17 23:00:38,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-04-17 23:00:38,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 268. [2020-04-17 23:00:38,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-04-17 23:00:38,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 691 transitions. [2020-04-17 23:00:38,966 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 691 transitions. Word has length 14 [2020-04-17 23:00:38,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:38,966 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 691 transitions. [2020-04-17 23:00:38,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:38,966 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 691 transitions. [2020-04-17 23:00:38,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:38,966 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:38,967 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:39,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:39,169 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:39,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:39,170 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 135 times [2020-04-17 23:00:39,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:39,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853164149] [2020-04-17 23:00:39,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:39,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:39,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:39,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853164149] [2020-04-17 23:00:39,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290877977] [2020-04-17 23:00:39,281 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:39,322 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:00:39,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:39,323 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:39,323 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:39,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:39,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:39,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:39,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341639342] [2020-04-17 23:00:39,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:39,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:39,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:39,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:39,484 INFO L87 Difference]: Start difference. First operand 268 states and 691 transitions. Second operand 17 states. [2020-04-17 23:00:39,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:39,831 INFO L93 Difference]: Finished difference Result 330 states and 806 transitions. [2020-04-17 23:00:39,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:00:39,831 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:39,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:39,832 INFO L225 Difference]: With dead ends: 330 [2020-04-17 23:00:39,832 INFO L226 Difference]: Without dead ends: 327 [2020-04-17 23:00:39,833 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-04-17 23:00:39,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-04-17 23:00:39,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 271. [2020-04-17 23:00:39,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-04-17 23:00:39,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 700 transitions. [2020-04-17 23:00:39,837 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 700 transitions. Word has length 14 [2020-04-17 23:00:39,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:39,838 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 700 transitions. [2020-04-17 23:00:39,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:39,838 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 700 transitions. [2020-04-17 23:00:39,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:39,838 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:39,838 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:40,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:40,039 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:40,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:40,039 INFO L82 PathProgramCache]: Analyzing trace with hash 319904318, now seen corresponding path program 136 times [2020-04-17 23:00:40,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:40,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827182527] [2020-04-17 23:00:40,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:40,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827182527] [2020-04-17 23:00:40,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125360654] [2020-04-17 23:00:40,135 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:40,176 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:00:40,176 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:40,177 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:40,177 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:40,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:40,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:40,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:40,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849011023] [2020-04-17 23:00:40,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:40,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:40,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:40,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:40,703 INFO L87 Difference]: Start difference. First operand 271 states and 700 transitions. Second operand 17 states. [2020-04-17 23:00:41,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:41,075 INFO L93 Difference]: Finished difference Result 365 states and 887 transitions. [2020-04-17 23:00:41,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:00:41,076 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:41,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:41,077 INFO L225 Difference]: With dead ends: 365 [2020-04-17 23:00:41,077 INFO L226 Difference]: Without dead ends: 360 [2020-04-17 23:00:41,077 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-04-17 23:00:41,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-04-17 23:00:41,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 272. [2020-04-17 23:00:41,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-04-17 23:00:41,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-04-17 23:00:41,082 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-04-17 23:00:41,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:41,082 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-04-17 23:00:41,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:41,082 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-04-17 23:00:41,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:41,083 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:41,083 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:41,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:41,283 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:41,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:41,284 INFO L82 PathProgramCache]: Analyzing trace with hash 319933148, now seen corresponding path program 137 times [2020-04-17 23:00:41,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:41,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699418134] [2020-04-17 23:00:41,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:41,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:41,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699418134] [2020-04-17 23:00:41,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805586991] [2020-04-17 23:00:41,382 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:41,427 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 23:00:41,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:41,428 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:41,429 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:41,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:41,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:41,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:41,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753553190] [2020-04-17 23:00:41,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:41,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:41,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:41,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:41,617 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-04-17 23:00:42,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:42,014 INFO L93 Difference]: Finished difference Result 363 states and 882 transitions. [2020-04-17 23:00:42,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:00:42,014 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:42,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:42,015 INFO L225 Difference]: With dead ends: 363 [2020-04-17 23:00:42,015 INFO L226 Difference]: Without dead ends: 358 [2020-04-17 23:00:42,016 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:00:42,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-04-17 23:00:42,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 271. [2020-04-17 23:00:42,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-04-17 23:00:42,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 700 transitions. [2020-04-17 23:00:42,021 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 700 transitions. Word has length 14 [2020-04-17 23:00:42,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:42,021 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 700 transitions. [2020-04-17 23:00:42,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:42,022 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 700 transitions. [2020-04-17 23:00:42,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:42,022 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:42,022 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:42,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:42,226 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:42,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:42,227 INFO L82 PathProgramCache]: Analyzing trace with hash 320857630, now seen corresponding path program 138 times [2020-04-17 23:00:42,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:42,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57232194] [2020-04-17 23:00:42,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:42,321 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:42,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57232194] [2020-04-17 23:00:42,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813659248] [2020-04-17 23:00:42,322 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:42,371 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:00:42,371 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:42,372 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:42,372 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:42,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:42,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:42,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527151833] [2020-04-17 23:00:42,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:42,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:42,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:42,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:42,498 INFO L87 Difference]: Start difference. First operand 271 states and 700 transitions. Second operand 17 states. [2020-04-17 23:00:42,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:42,784 INFO L93 Difference]: Finished difference Result 333 states and 812 transitions. [2020-04-17 23:00:42,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:00:42,784 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:42,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:42,784 INFO L225 Difference]: With dead ends: 333 [2020-04-17 23:00:42,785 INFO L226 Difference]: Without dead ends: 315 [2020-04-17 23:00:42,785 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:00:42,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-04-17 23:00:42,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 266. [2020-04-17 23:00:42,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-04-17 23:00:42,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-04-17 23:00:42,788 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-04-17 23:00:42,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:42,788 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-04-17 23:00:42,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:42,788 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-04-17 23:00:42,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:42,789 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:42,789 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:42,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:42,990 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:42,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:42,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1429448084, now seen corresponding path program 139 times [2020-04-17 23:00:42,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:42,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573667078] [2020-04-17 23:00:42,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:42,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:43,099 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:43,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573667078] [2020-04-17 23:00:43,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316104191] [2020-04-17 23:00:43,100 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:43,141 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:43,141 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:43,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:43,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:43,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727308688] [2020-04-17 23:00:43,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:43,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:43,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:43,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:43,272 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 17 states. [2020-04-17 23:00:43,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:43,370 INFO L93 Difference]: Finished difference Result 296 states and 732 transitions. [2020-04-17 23:00:43,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 23:00:43,370 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:43,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:43,371 INFO L225 Difference]: With dead ends: 296 [2020-04-17 23:00:43,371 INFO L226 Difference]: Without dead ends: 294 [2020-04-17 23:00:43,371 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:00:43,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-04-17 23:00:43,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 270. [2020-04-17 23:00:43,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-04-17 23:00:43,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 695 transitions. [2020-04-17 23:00:43,375 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 695 transitions. Word has length 14 [2020-04-17 23:00:43,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:43,376 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 695 transitions. [2020-04-17 23:00:43,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:43,376 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 695 transitions. [2020-04-17 23:00:43,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:43,376 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:43,376 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:43,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:43,577 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:43,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:43,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 140 times [2020-04-17 23:00:43,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:43,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558444539] [2020-04-17 23:00:43,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:43,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:43,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558444539] [2020-04-17 23:00:43,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344946900] [2020-04-17 23:00:43,696 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:43,744 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:00:43,744 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:43,745 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:43,745 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:43,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:43,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:43,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:43,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903285279] [2020-04-17 23:00:43,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:43,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:43,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:43,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:43,880 INFO L87 Difference]: Start difference. First operand 270 states and 695 transitions. Second operand 17 states. [2020-04-17 23:00:44,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:44,115 INFO L93 Difference]: Finished difference Result 328 states and 803 transitions. [2020-04-17 23:00:44,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:00:44,116 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:44,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:44,117 INFO L225 Difference]: With dead ends: 328 [2020-04-17 23:00:44,117 INFO L226 Difference]: Without dead ends: 325 [2020-04-17 23:00:44,117 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:00:44,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-04-17 23:00:44,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 268. [2020-04-17 23:00:44,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-04-17 23:00:44,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-04-17 23:00:44,122 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-04-17 23:00:44,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:44,122 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-04-17 23:00:44,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:44,122 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-04-17 23:00:44,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:44,122 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:44,123 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:44,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:44,323 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:44,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:44,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 141 times [2020-04-17 23:00:44,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:44,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729256042] [2020-04-17 23:00:44,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:44,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:44,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729256042] [2020-04-17 23:00:44,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965788269] [2020-04-17 23:00:44,415 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:44,458 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:00:44,458 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:44,459 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:44,459 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:51,096 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-17 23:00:51,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:51,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:51,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 23:00:51,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256527670] [2020-04-17 23:00:51,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:00:51,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:51,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:00:51,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=226, Unknown=3, NotChecked=0, Total=306 [2020-04-17 23:00:51,098 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 18 states. [2020-04-17 23:00:53,382 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 25 [2020-04-17 23:00:55,630 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-04-17 23:01:00,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:00,771 INFO L93 Difference]: Finished difference Result 353 states and 858 transitions. [2020-04-17 23:01:00,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:01:00,772 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 23:01:00,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:00,773 INFO L225 Difference]: With dead ends: 353 [2020-04-17 23:01:00,773 INFO L226 Difference]: Without dead ends: 349 [2020-04-17 23:01:00,773 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=205, Invalid=442, Unknown=3, NotChecked=0, Total=650 [2020-04-17 23:01:00,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-04-17 23:01:00,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 266. [2020-04-17 23:01:00,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-04-17 23:01:00,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-04-17 23:01:00,778 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-04-17 23:01:00,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:00,778 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-04-17 23:01:00,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:01:00,778 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-04-17 23:01:00,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:00,779 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:00,779 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:00,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:00,982 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:00,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:00,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 142 times [2020-04-17 23:01:00,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:00,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596022626] [2020-04-17 23:01:00,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:01,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596022626] [2020-04-17 23:01:01,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150541252] [2020-04-17 23:01:01,069 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:01,114 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:01:01,114 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:01,115 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:01,115 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:01,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:01,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:01,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960656369] [2020-04-17 23:01:01,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:01,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:01,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:01,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:01,844 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 17 states. [2020-04-17 23:01:02,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:02,258 INFO L93 Difference]: Finished difference Result 331 states and 805 transitions. [2020-04-17 23:01:02,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:01:02,258 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:02,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:02,259 INFO L225 Difference]: With dead ends: 331 [2020-04-17 23:01:02,259 INFO L226 Difference]: Without dead ends: 328 [2020-04-17 23:01:02,260 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:01:02,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-04-17 23:01:02,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 268. [2020-04-17 23:01:02,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-04-17 23:01:02,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-04-17 23:01:02,266 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-04-17 23:01:02,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:02,266 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-04-17 23:01:02,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:02,267 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-04-17 23:01:02,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:02,267 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:02,267 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:02,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:02,471 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:02,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:02,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1428523602, now seen corresponding path program 143 times [2020-04-17 23:01:02,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:02,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27554875] [2020-04-17 23:01:02,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:02,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:02,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:02,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27554875] [2020-04-17 23:01:02,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935182122] [2020-04-17 23:01:02,599 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:02,661 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:01:02,661 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:02,662 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:02,663 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:06,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:06,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:06,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:06,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835293117] [2020-04-17 23:01:06,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:06,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:06,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:06,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:06,888 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 17 states. [2020-04-17 23:01:07,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:07,468 INFO L93 Difference]: Finished difference Result 357 states and 866 transitions. [2020-04-17 23:01:07,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:01:07,468 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:07,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:07,470 INFO L225 Difference]: With dead ends: 357 [2020-04-17 23:01:07,470 INFO L226 Difference]: Without dead ends: 352 [2020-04-17 23:01:07,470 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:01:07,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-04-17 23:01:07,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 268. [2020-04-17 23:01:07,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-04-17 23:01:07,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-04-17 23:01:07,479 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-04-17 23:01:07,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:07,479 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-04-17 23:01:07,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:07,479 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-04-17 23:01:07,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:07,480 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:07,480 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:07,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:07,685 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:07,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:07,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1428494772, now seen corresponding path program 144 times [2020-04-17 23:01:07,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:07,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614063516] [2020-04-17 23:01:07,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:07,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614063516] [2020-04-17 23:01:07,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782337130] [2020-04-17 23:01:07,795 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:07,843 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:01:07,843 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:07,844 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:07,845 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:14,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:14,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:14,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:14,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365688459] [2020-04-17 23:01:14,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:14,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:14,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:14,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:14,124 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 17 states. [2020-04-17 23:01:14,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:14,491 INFO L93 Difference]: Finished difference Result 339 states and 826 transitions. [2020-04-17 23:01:14,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:01:14,491 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:14,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:14,492 INFO L225 Difference]: With dead ends: 339 [2020-04-17 23:01:14,492 INFO L226 Difference]: Without dead ends: 335 [2020-04-17 23:01:14,493 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:01:14,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-04-17 23:01:14,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 264. [2020-04-17 23:01:14,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-04-17 23:01:14,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 677 transitions. [2020-04-17 23:01:14,497 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 677 transitions. Word has length 14 [2020-04-17 23:01:14,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:14,497 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 677 transitions. [2020-04-17 23:01:14,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:14,497 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 677 transitions. [2020-04-17 23:01:14,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:14,498 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:14,498 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:14,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:14,699 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:14,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:14,699 INFO L82 PathProgramCache]: Analyzing trace with hash -792218594, now seen corresponding path program 145 times [2020-04-17 23:01:14,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:14,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253444141] [2020-04-17 23:01:14,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:14,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:14,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253444141] [2020-04-17 23:01:14,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256418939] [2020-04-17 23:01:14,813 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:14,855 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:14,855 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:15,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:15,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:15,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803740051] [2020-04-17 23:01:15,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:15,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:15,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:15,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:15,003 INFO L87 Difference]: Start difference. First operand 264 states and 677 transitions. Second operand 17 states. [2020-04-17 23:01:15,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:15,143 INFO L93 Difference]: Finished difference Result 287 states and 713 transitions. [2020-04-17 23:01:15,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 23:01:15,143 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:15,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:15,144 INFO L225 Difference]: With dead ends: 287 [2020-04-17 23:01:15,144 INFO L226 Difference]: Without dead ends: 285 [2020-04-17 23:01:15,145 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:01:15,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-04-17 23:01:15,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 266. [2020-04-17 23:01:15,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-04-17 23:01:15,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-04-17 23:01:15,149 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-04-17 23:01:15,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:15,150 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-04-17 23:01:15,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:15,150 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-04-17 23:01:15,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:15,150 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:15,150 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:15,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:15,351 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:15,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:15,352 INFO L82 PathProgramCache]: Analyzing trace with hash -792217633, now seen corresponding path program 146 times [2020-04-17 23:01:15,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:15,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704941643] [2020-04-17 23:01:15,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:15,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:15,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:15,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704941643] [2020-04-17 23:01:15,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705982648] [2020-04-17 23:01:15,461 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:15,501 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:01:15,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:15,502 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:15,502 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:15,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:15,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:15,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876195847] [2020-04-17 23:01:15,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:15,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:15,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:15,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:15,626 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 17 states. [2020-04-17 23:01:15,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:15,879 INFO L93 Difference]: Finished difference Result 317 states and 778 transitions. [2020-04-17 23:01:15,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:01:15,880 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:15,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:15,881 INFO L225 Difference]: With dead ends: 317 [2020-04-17 23:01:15,881 INFO L226 Difference]: Without dead ends: 314 [2020-04-17 23:01:15,881 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:01:15,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-04-17 23:01:15,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 264. [2020-04-17 23:01:15,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-04-17 23:01:15,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 677 transitions. [2020-04-17 23:01:15,885 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 677 transitions. Word has length 14 [2020-04-17 23:01:15,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:15,886 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 677 transitions. [2020-04-17 23:01:15,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:15,886 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 677 transitions. [2020-04-17 23:01:15,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:15,886 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:15,886 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:16,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:16,087 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:16,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:16,088 INFO L82 PathProgramCache]: Analyzing trace with hash -792188803, now seen corresponding path program 147 times [2020-04-17 23:01:16,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:16,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273254085] [2020-04-17 23:01:16,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:16,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:16,180 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:16,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273254085] [2020-04-17 23:01:16,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978196410] [2020-04-17 23:01:16,181 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:16,223 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:01:16,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:16,224 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:16,224 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:16,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:16,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:16,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18141555] [2020-04-17 23:01:16,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:16,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:16,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:16,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:16,792 INFO L87 Difference]: Start difference. First operand 264 states and 677 transitions. Second operand 17 states. [2020-04-17 23:01:17,589 WARN L192 SmtUtils]: Spent 493.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-04-17 23:01:17,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:17,611 INFO L93 Difference]: Finished difference Result 330 states and 807 transitions. [2020-04-17 23:01:17,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:01:17,611 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:17,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:17,612 INFO L225 Difference]: With dead ends: 330 [2020-04-17 23:01:17,612 INFO L226 Difference]: Without dead ends: 326 [2020-04-17 23:01:17,612 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-04-17 23:01:17,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-04-17 23:01:17,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 262. [2020-04-17 23:01:17,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-04-17 23:01:17,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 671 transitions. [2020-04-17 23:01:17,616 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 671 transitions. Word has length 14 [2020-04-17 23:01:17,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:17,616 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 671 transitions. [2020-04-17 23:01:17,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:17,616 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 671 transitions. [2020-04-17 23:01:17,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:17,617 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:17,617 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:17,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:17,818 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:17,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:17,818 INFO L82 PathProgramCache]: Analyzing trace with hash -771662804, now seen corresponding path program 148 times [2020-04-17 23:01:17,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:17,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916836542] [2020-04-17 23:01:17,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:17,921 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:17,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916836542] [2020-04-17 23:01:17,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012409711] [2020-04-17 23:01:17,922 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:17,969 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:01:17,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:17,970 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:17,970 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:18,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:18,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:18,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78080412] [2020-04-17 23:01:18,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:18,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:18,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:18,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:18,091 INFO L87 Difference]: Start difference. First operand 262 states and 671 transitions. Second operand 17 states. [2020-04-17 23:01:18,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:18,253 INFO L93 Difference]: Finished difference Result 278 states and 694 transitions. [2020-04-17 23:01:18,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 23:01:18,253 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:18,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:18,254 INFO L225 Difference]: With dead ends: 278 [2020-04-17 23:01:18,254 INFO L226 Difference]: Without dead ends: 276 [2020-04-17 23:01:18,255 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:01:18,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-04-17 23:01:18,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 262. [2020-04-17 23:01:18,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-04-17 23:01:18,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 671 transitions. [2020-04-17 23:01:18,259 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 671 transitions. Word has length 14 [2020-04-17 23:01:18,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:18,259 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 671 transitions. [2020-04-17 23:01:18,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:18,260 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 671 transitions. [2020-04-17 23:01:18,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:18,260 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:18,260 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:18,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:18,461 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:18,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:18,461 INFO L82 PathProgramCache]: Analyzing trace with hash -771661843, now seen corresponding path program 149 times [2020-04-17 23:01:18,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:18,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54110714] [2020-04-17 23:01:18,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:18,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:18,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54110714] [2020-04-17 23:01:18,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953572280] [2020-04-17 23:01:18,561 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:18,604 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 23:01:18,605 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:18,606 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:18,606 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:18,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:18,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:18,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:18,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753560881] [2020-04-17 23:01:18,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:18,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:18,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:18,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:18,745 INFO L87 Difference]: Start difference. First operand 262 states and 671 transitions. Second operand 17 states. [2020-04-17 23:01:19,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:19,061 INFO L93 Difference]: Finished difference Result 306 states and 753 transitions. [2020-04-17 23:01:19,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:01:19,062 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:19,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:19,062 INFO L225 Difference]: With dead ends: 306 [2020-04-17 23:01:19,063 INFO L226 Difference]: Without dead ends: 303 [2020-04-17 23:01:19,063 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-04-17 23:01:19,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-04-17 23:01:19,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 260. [2020-04-17 23:01:19,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-04-17 23:01:19,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 665 transitions. [2020-04-17 23:01:19,067 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 665 transitions. Word has length 14 [2020-04-17 23:01:19,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:19,067 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 665 transitions. [2020-04-17 23:01:19,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:19,067 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 665 transitions. [2020-04-17 23:01:19,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:19,069 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:19,069 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:19,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:19,270 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:19,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:19,271 INFO L82 PathProgramCache]: Analyzing trace with hash -770999714, now seen corresponding path program 150 times [2020-04-17 23:01:19,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:19,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712853212] [2020-04-17 23:01:19,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:19,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712853212] [2020-04-17 23:01:19,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965534006] [2020-04-17 23:01:19,355 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:19,400 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:01:19,400 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:19,400 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:01:19,401 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:19,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:19,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:19,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 23:01:19,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789355805] [2020-04-17 23:01:19,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:01:19,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:19,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:01:19,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:01:19,430 INFO L87 Difference]: Start difference. First operand 260 states and 665 transitions. Second operand 11 states. [2020-04-17 23:01:19,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:19,584 INFO L93 Difference]: Finished difference Result 269 states and 677 transitions. [2020-04-17 23:01:19,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 23:01:19,585 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 23:01:19,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:19,585 INFO L225 Difference]: With dead ends: 269 [2020-04-17 23:01:19,586 INFO L226 Difference]: Without dead ends: 267 [2020-04-17 23:01:19,586 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:01:19,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-04-17 23:01:19,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 256. [2020-04-17 23:01:19,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-04-17 23:01:19,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 659 transitions. [2020-04-17 23:01:19,590 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 659 transitions. Word has length 14 [2020-04-17 23:01:19,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:19,591 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 659 transitions. [2020-04-17 23:01:19,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:01:19,591 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 659 transitions. [2020-04-17 23:01:19,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:19,591 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:19,591 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:19,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:19,792 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:19,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:19,793 INFO L82 PathProgramCache]: Analyzing trace with hash -770977394, now seen corresponding path program 151 times [2020-04-17 23:01:19,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:19,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750503420] [2020-04-17 23:01:19,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:19,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:19,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750503420] [2020-04-17 23:01:19,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050917848] [2020-04-17 23:01:19,885 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:19,930 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:19,935 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:20,064 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:20,082 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:20,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:20,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:20,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026012235] [2020-04-17 23:01:20,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:20,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:20,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:20,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:20,084 INFO L87 Difference]: Start difference. First operand 256 states and 659 transitions. Second operand 17 states. [2020-04-17 23:01:20,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:20,469 INFO L93 Difference]: Finished difference Result 298 states and 754 transitions. [2020-04-17 23:01:20,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:01:20,470 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:20,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:20,470 INFO L225 Difference]: With dead ends: 298 [2020-04-17 23:01:20,471 INFO L226 Difference]: Without dead ends: 294 [2020-04-17 23:01:20,471 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-04-17 23:01:20,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-04-17 23:01:20,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 257. [2020-04-17 23:01:20,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-04-17 23:01:20,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 662 transitions. [2020-04-17 23:01:20,475 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 662 transitions. Word has length 14 [2020-04-17 23:01:20,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:20,475 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 662 transitions. [2020-04-17 23:01:20,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:20,476 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 662 transitions. [2020-04-17 23:01:20,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:20,476 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:20,476 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:20,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:20,677 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:20,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:20,677 INFO L82 PathProgramCache]: Analyzing trace with hash -770969923, now seen corresponding path program 152 times [2020-04-17 23:01:20,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:20,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580708868] [2020-04-17 23:01:20,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:20,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580708868] [2020-04-17 23:01:20,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403484104] [2020-04-17 23:01:20,761 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:20,804 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:01:20,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:20,805 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:20,806 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:20,951 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:20,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:20,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:20,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518832227] [2020-04-17 23:01:20,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:20,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:20,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:20,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:20,952 INFO L87 Difference]: Start difference. First operand 257 states and 662 transitions. Second operand 17 states. [2020-04-17 23:01:21,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:21,327 INFO L93 Difference]: Finished difference Result 313 states and 786 transitions. [2020-04-17 23:01:21,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:01:21,328 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:21,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:21,329 INFO L225 Difference]: With dead ends: 313 [2020-04-17 23:01:21,329 INFO L226 Difference]: Without dead ends: 310 [2020-04-17 23:01:21,329 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:01:21,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-04-17 23:01:21,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 259. [2020-04-17 23:01:21,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-04-17 23:01:21,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 669 transitions. [2020-04-17 23:01:21,334 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 669 transitions. Word has length 14 [2020-04-17 23:01:21,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:21,334 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 669 transitions. [2020-04-17 23:01:21,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:21,334 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 669 transitions. [2020-04-17 23:01:21,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:21,334 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:21,334 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:21,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:21,535 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:21,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:21,536 INFO L82 PathProgramCache]: Analyzing trace with hash -770948564, now seen corresponding path program 153 times [2020-04-17 23:01:21,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:21,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225457305] [2020-04-17 23:01:21,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:21,610 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:21,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225457305] [2020-04-17 23:01:21,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023753243] [2020-04-17 23:01:21,611 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:21,658 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:01:21,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:21,658 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:21,659 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:22,062 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:22,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:22,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:22,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470040851] [2020-04-17 23:01:22,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:22,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:22,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:22,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:22,081 INFO L87 Difference]: Start difference. First operand 259 states and 669 transitions. Second operand 17 states. [2020-04-17 23:01:22,612 WARN L192 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-04-17 23:01:23,359 WARN L192 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-04-17 23:01:24,095 WARN L192 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-04-17 23:01:24,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:24,105 INFO L93 Difference]: Finished difference Result 314 states and 795 transitions. [2020-04-17 23:01:24,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:01:24,105 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:24,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:24,106 INFO L225 Difference]: With dead ends: 314 [2020-04-17 23:01:24,106 INFO L226 Difference]: Without dead ends: 309 [2020-04-17 23:01:24,106 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-04-17 23:01:24,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-04-17 23:01:24,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 259. [2020-04-17 23:01:24,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-04-17 23:01:24,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 668 transitions. [2020-04-17 23:01:24,110 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 668 transitions. Word has length 14 [2020-04-17 23:01:24,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:24,110 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 668 transitions. [2020-04-17 23:01:24,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:24,110 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 668 transitions. [2020-04-17 23:01:24,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:24,111 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:24,111 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:24,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:24,311 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:24,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:24,312 INFO L82 PathProgramCache]: Analyzing trace with hash -770947603, now seen corresponding path program 154 times [2020-04-17 23:01:24,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:24,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804341878] [2020-04-17 23:01:24,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:24,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804341878] [2020-04-17 23:01:24,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030544561] [2020-04-17 23:01:24,398 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:24,439 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:01:24,439 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:24,440 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:24,440 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:24,550 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:24,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:24,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:24,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 23:01:24,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099446713] [2020-04-17 23:01:25,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:01:25,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:25,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:01:25,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=221, Unknown=1, NotChecked=0, Total=306 [2020-04-17 23:01:25,000 INFO L87 Difference]: Start difference. First operand 259 states and 668 transitions. Second operand 18 states. [2020-04-17 23:01:25,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:25,432 INFO L93 Difference]: Finished difference Result 333 states and 837 transitions. [2020-04-17 23:01:25,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:01:25,432 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 23:01:25,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:25,433 INFO L225 Difference]: With dead ends: 333 [2020-04-17 23:01:25,433 INFO L226 Difference]: Without dead ends: 328 [2020-04-17 23:01:25,434 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=274, Invalid=595, Unknown=1, NotChecked=0, Total=870 [2020-04-17 23:01:25,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-04-17 23:01:25,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 259. [2020-04-17 23:01:25,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-04-17 23:01:25,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 671 transitions. [2020-04-17 23:01:25,438 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 671 transitions. Word has length 14 [2020-04-17 23:01:25,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:25,438 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 671 transitions. [2020-04-17 23:01:25,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:01:25,439 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 671 transitions. [2020-04-17 23:01:25,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:25,439 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:25,439 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:25,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:25,642 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:25,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:25,643 INFO L82 PathProgramCache]: Analyzing trace with hash -770739283, now seen corresponding path program 155 times [2020-04-17 23:01:25,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:25,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482841299] [2020-04-17 23:01:25,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:25,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:25,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:25,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482841299] [2020-04-17 23:01:25,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831524188] [2020-04-17 23:01:25,731 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:25,772 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 23:01:25,772 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:25,773 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:25,774 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:33,983 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-17 23:01:33,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:33,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:33,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 23:01:33,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432802016] [2020-04-17 23:01:33,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:01:33,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:33,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:01:33,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=234, Unknown=3, NotChecked=0, Total=306 [2020-04-17 23:01:33,986 INFO L87 Difference]: Start difference. First operand 259 states and 671 transitions. Second operand 18 states. [2020-04-17 23:01:36,279 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 25 [2020-04-17 23:01:48,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:48,522 INFO L93 Difference]: Finished difference Result 366 states and 904 transitions. [2020-04-17 23:01:48,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:01:48,523 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 23:01:48,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:48,523 INFO L225 Difference]: With dead ends: 366 [2020-04-17 23:01:48,524 INFO L226 Difference]: Without dead ends: 359 [2020-04-17 23:01:48,524 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=213, Invalid=540, Unknown=3, NotChecked=0, Total=756 [2020-04-17 23:01:48,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-04-17 23:01:48,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 261. [2020-04-17 23:01:48,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-04-17 23:01:48,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 678 transitions. [2020-04-17 23:01:48,529 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 678 transitions. Word has length 14 [2020-04-17 23:01:48,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:48,529 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 678 transitions. [2020-04-17 23:01:48,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:01:48,529 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 678 transitions. [2020-04-17 23:01:48,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:48,529 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:48,530 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:48,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:48,733 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:48,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:48,733 INFO L82 PathProgramCache]: Analyzing trace with hash -770076193, now seen corresponding path program 156 times [2020-04-17 23:01:48,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:48,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519062248] [2020-04-17 23:01:48,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:48,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:48,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519062248] [2020-04-17 23:01:48,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326218472] [2020-04-17 23:01:48,806 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:48,868 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:01:48,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:48,870 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:48,870 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:49,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:49,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:49,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450818064] [2020-04-17 23:01:49,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:49,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:49,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:49,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=193, Unknown=1, NotChecked=0, Total=272 [2020-04-17 23:01:49,620 INFO L87 Difference]: Start difference. First operand 261 states and 678 transitions. Second operand 17 states. [2020-04-17 23:01:50,273 WARN L192 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2020-04-17 23:01:51,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:51,258 INFO L93 Difference]: Finished difference Result 362 states and 911 transitions. [2020-04-17 23:01:51,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:01:51,258 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:51,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:51,259 INFO L225 Difference]: With dead ends: 362 [2020-04-17 23:01:51,259 INFO L226 Difference]: Without dead ends: 358 [2020-04-17 23:01:51,260 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=272, Invalid=597, Unknown=1, NotChecked=0, Total=870 [2020-04-17 23:01:51,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-04-17 23:01:51,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 265. [2020-04-17 23:01:51,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-04-17 23:01:51,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 692 transitions. [2020-04-17 23:01:51,265 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 692 transitions. Word has length 14 [2020-04-17 23:01:51,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:51,265 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 692 transitions. [2020-04-17 23:01:51,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:51,265 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 692 transitions. [2020-04-17 23:01:51,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:51,265 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:51,265 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:51,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:51,466 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:51,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:51,467 INFO L82 PathProgramCache]: Analyzing trace with hash -770054834, now seen corresponding path program 157 times [2020-04-17 23:01:51,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:51,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505289591] [2020-04-17 23:01:51,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:51,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:51,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505289591] [2020-04-17 23:01:51,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186226927] [2020-04-17 23:01:51,545 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:51,585 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:51,585 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:52,875 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-04-17 23:01:52,876 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:52,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:52,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:52,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602353012] [2020-04-17 23:01:52,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:52,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:52,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:52,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:52,890 INFO L87 Difference]: Start difference. First operand 265 states and 692 transitions. Second operand 17 states. [2020-04-17 23:01:53,677 WARN L192 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-04-17 23:01:54,250 WARN L192 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-04-17 23:01:54,671 WARN L192 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-04-17 23:01:55,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:55,246 INFO L93 Difference]: Finished difference Result 322 states and 822 transitions. [2020-04-17 23:01:55,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 23:01:55,247 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:55,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:55,247 INFO L225 Difference]: With dead ends: 322 [2020-04-17 23:01:55,248 INFO L226 Difference]: Without dead ends: 316 [2020-04-17 23:01:55,248 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=358, Invalid=698, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 23:01:55,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-04-17 23:01:55,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 265. [2020-04-17 23:01:55,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-04-17 23:01:55,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 690 transitions. [2020-04-17 23:01:55,252 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 690 transitions. Word has length 14 [2020-04-17 23:01:55,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:55,252 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 690 transitions. [2020-04-17 23:01:55,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:55,252 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 690 transitions. [2020-04-17 23:01:55,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:55,253 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:55,253 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:55,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:55,454 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:55,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:55,454 INFO L82 PathProgramCache]: Analyzing trace with hash -770053873, now seen corresponding path program 158 times [2020-04-17 23:01:55,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:55,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775317261] [2020-04-17 23:01:55,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:55,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:55,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:55,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775317261] [2020-04-17 23:01:55,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693681610] [2020-04-17 23:01:55,538 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:55,578 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:01:55,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:55,579 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:55,579 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:56,135 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:56,819 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:56,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:56,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 23:01:56,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341545904] [2020-04-17 23:01:56,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:01:56,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:56,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:01:56,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=214, Unknown=2, NotChecked=0, Total=306 [2020-04-17 23:01:56,821 INFO L87 Difference]: Start difference. First operand 265 states and 690 transitions. Second operand 18 states. [2020-04-17 23:01:58,947 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2020-04-17 23:02:00,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:00,476 INFO L93 Difference]: Finished difference Result 404 states and 1014 transitions. [2020-04-17 23:02:00,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 23:02:00,477 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 23:02:00,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:00,478 INFO L225 Difference]: With dead ends: 404 [2020-04-17 23:02:00,478 INFO L226 Difference]: Without dead ends: 395 [2020-04-17 23:02:00,478 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=402, Invalid=927, Unknown=3, NotChecked=0, Total=1332 [2020-04-17 23:02:00,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-04-17 23:02:00,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 262. [2020-04-17 23:02:00,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-04-17 23:02:00,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 685 transitions. [2020-04-17 23:02:00,483 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 685 transitions. Word has length 14 [2020-04-17 23:02:00,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:00,483 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 685 transitions. [2020-04-17 23:02:00,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:02:00,483 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 685 transitions. [2020-04-17 23:02:00,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:02:00,483 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:00,484 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:00,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:00,684 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:00,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:00,685 INFO L82 PathProgramCache]: Analyzing trace with hash -770025043, now seen corresponding path program 159 times [2020-04-17 23:02:00,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:00,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540736449] [2020-04-17 23:02:00,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:00,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540736449] [2020-04-17 23:02:00,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798162679] [2020-04-17 23:02:00,764 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:00,807 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:02:00,807 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:00,808 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:00,808 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:02,989 WARN L192 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-04-17 23:02:02,989 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:03,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:03,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:02:03,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031432029] [2020-04-17 23:02:03,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:02:03,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:03,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:02:03,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=185, Unknown=1, NotChecked=0, Total=272 [2020-04-17 23:02:03,006 INFO L87 Difference]: Start difference. First operand 262 states and 685 transitions. Second operand 17 states. [2020-04-17 23:02:03,719 WARN L192 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-04-17 23:02:04,004 WARN L192 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-04-17 23:02:05,197 WARN L192 SmtUtils]: Spent 988.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-04-17 23:02:05,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:05,672 INFO L93 Difference]: Finished difference Result 358 states and 909 transitions. [2020-04-17 23:02:05,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:02:05,673 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:02:05,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:05,674 INFO L225 Difference]: With dead ends: 358 [2020-04-17 23:02:05,674 INFO L226 Difference]: Without dead ends: 353 [2020-04-17 23:02:05,675 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=338, Invalid=716, Unknown=2, NotChecked=0, Total=1056 [2020-04-17 23:02:05,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-04-17 23:02:05,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 262. [2020-04-17 23:02:05,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-04-17 23:02:05,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 685 transitions. [2020-04-17 23:02:05,679 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 685 transitions. Word has length 14 [2020-04-17 23:02:05,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:05,679 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 685 transitions. [2020-04-17 23:02:05,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:02:05,679 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 685 transitions. [2020-04-17 23:02:05,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:02:05,680 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:05,680 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:05,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:05,882 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:05,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:05,883 INFO L82 PathProgramCache]: Analyzing trace with hash -763589443, now seen corresponding path program 160 times [2020-04-17 23:02:05,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:05,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526422927] [2020-04-17 23:02:05,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:05,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:05,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526422927] [2020-04-17 23:02:05,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599608050] [2020-04-17 23:02:05,964 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:06,006 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:06,006 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:06,007 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:06,007 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:06,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:06,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:02:06,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074866338] [2020-04-17 23:02:06,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:02:06,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:06,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:02:06,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:02:06,193 INFO L87 Difference]: Start difference. First operand 262 states and 685 transitions. Second operand 17 states. [2020-04-17 23:02:06,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:06,625 INFO L93 Difference]: Finished difference Result 350 states and 871 transitions. [2020-04-17 23:02:06,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:02:06,626 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:02:06,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:06,627 INFO L225 Difference]: With dead ends: 350 [2020-04-17 23:02:06,627 INFO L226 Difference]: Without dead ends: 347 [2020-04-17 23:02:06,627 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:02:06,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-04-17 23:02:06,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 265. [2020-04-17 23:02:06,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-04-17 23:02:06,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 696 transitions. [2020-04-17 23:02:06,632 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 696 transitions. Word has length 14 [2020-04-17 23:02:06,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:06,632 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 696 transitions. [2020-04-17 23:02:06,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:02:06,632 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 696 transitions. [2020-04-17 23:02:06,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:02:06,633 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:06,633 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:06,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:06,833 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:06,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:06,834 INFO L82 PathProgramCache]: Analyzing trace with hash -763588482, now seen corresponding path program 161 times [2020-04-17 23:02:06,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:06,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006012301] [2020-04-17 23:02:06,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:06,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:06,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006012301] [2020-04-17 23:02:06,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181220423] [2020-04-17 23:02:06,908 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:06,950 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:06,950 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:06,951 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:06,952 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:07,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:07,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:02:07,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424574841] [2020-04-17 23:02:07,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:02:07,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:07,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:02:07,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:02:07,135 INFO L87 Difference]: Start difference. First operand 265 states and 696 transitions. Second operand 17 states. Received shutdown request... [2020-04-17 23:02:07,672 WARN L209 SmtUtils]: Removed 3 from assertion stack [2020-04-17 23:02:07,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:02:07,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:07,873 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-17 23:02:07,876 WARN L228 ceAbstractionStarter]: Timeout [2020-04-17 23:02:07,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.04 11:02:07 BasicIcfg [2020-04-17 23:02:07,877 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-17 23:02:07,878 INFO L168 Benchmark]: Toolchain (without parser) took 288283.83 ms. Allocated memory was 137.9 MB in the beginning and 182.5 MB in the end (delta: 44.6 MB). Free memory was 100.1 MB in the beginning and 127.8 MB in the end (delta: -27.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. [2020-04-17 23:02:07,879 INFO L168 Benchmark]: CDTParser took 1.49 ms. Allocated memory is still 137.9 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-04-17 23:02:07,879 INFO L168 Benchmark]: CACSL2BoogieTranslator took 686.37 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 98.3 MB in the beginning and 159.8 MB in the end (delta: -61.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. [2020-04-17 23:02:07,879 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.97 ms. Allocated memory is still 200.8 MB. Free memory was 159.8 MB in the beginning and 157.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-04-17 23:02:07,880 INFO L168 Benchmark]: Boogie Preprocessor took 30.80 ms. Allocated memory is still 200.8 MB. Free memory was 157.8 MB in the beginning and 156.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-04-17 23:02:07,880 INFO L168 Benchmark]: RCFGBuilder took 437.22 ms. Allocated memory is still 200.8 MB. Free memory was 156.4 MB in the beginning and 136.3 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2020-04-17 23:02:07,880 INFO L168 Benchmark]: TraceAbstraction took 287055.05 ms. Allocated memory was 200.8 MB in the beginning and 182.5 MB in the end (delta: -18.4 MB). Free memory was 135.6 MB in the beginning and 127.8 MB in the end (delta: 7.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-04-17 23:02:07,886 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.49 ms. Allocated memory is still 137.9 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 686.37 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 98.3 MB in the beginning and 159.8 MB in the end (delta: -61.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.97 ms. Allocated memory is still 200.8 MB. Free memory was 159.8 MB in the beginning and 157.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.80 ms. Allocated memory is still 200.8 MB. Free memory was 157.8 MB in the beginning and 156.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 437.22 ms. Allocated memory is still 200.8 MB. Free memory was 156.4 MB in the beginning and 136.3 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 287055.05 ms. Allocated memory was 200.8 MB in the beginning and 182.5 MB in the end (delta: -18.4 MB). Free memory was 135.6 MB in the beginning and 127.8 MB in the end (delta: 7.8 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.5s, 59 ProgramPointsBefore, 20 ProgramPointsAfterwards, 57 TransitionsBefore, 16 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 553 VarBasedMoverChecksPositive, 10 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 879 CheckedPairsTotal, 48 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was constructing difference of abstraction (265states) and FLOYD_HOARE automaton (currently 17 states, 17 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 14 for 22ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 286.9s, OverallIterations: 189, TraceHistogramMax: 6, AutomataDifference: 131.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 2507 SDtfs, 16774 SDslu, 16795 SDs, 0 SdLazy, 11965 SolverSat, 4438 SolverUnsat, 39 SolverUnknown, 0 SolverNotchecked, 62.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4787 GetRequests, 901 SyntacticMatches, 170 SemanticMatches, 3715 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19339 ImplicationChecksByTransitivity, 167.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=274occurred in iteration=157, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 188 MinimizatonAttempts, 8994 StatesRemovedByMinimization, 186 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 105.2s InterpolantComputationTime, 4654 NumberOfCodeBlocks, 4654 NumberOfCodeBlocksAsserted, 573 NumberOfCheckSat, 4284 ConstructedInterpolants, 56 QuantifiedInterpolants, 449057 SizeOfPredicates, 179 NumberOfNonLiveVariables, 15780 ConjunctsInSsa, 1770 ConjunctsInUnsatCore, 370 InterpolantComputations, 10 PerfectInterpolantSequences, 50/1760 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown