/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 10:35:22,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 10:35:22,134 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 10:35:22,157 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 10:35:22,158 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 10:35:22,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 10:35:22,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 10:35:22,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 10:35:22,163 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 10:35:22,164 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 10:35:22,165 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 10:35:22,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 10:35:22,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 10:35:22,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 10:35:22,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 10:35:22,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 10:35:22,170 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 10:35:22,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 10:35:22,173 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 10:35:22,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 10:35:22,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 10:35:22,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 10:35:22,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 10:35:22,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 10:35:22,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 10:35:22,182 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 10:35:22,182 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 10:35:22,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 10:35:22,183 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 10:35:22,184 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 10:35:22,185 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 10:35:22,185 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 10:35:22,186 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 10:35:22,187 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 10:35:22,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 10:35:22,188 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 10:35:22,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 10:35:22,189 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 10:35:22,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 10:35:22,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 10:35:22,191 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 10:35:22,192 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-09 10:35:22,214 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 10:35:22,214 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 10:35:22,215 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 10:35:22,216 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 10:35:22,216 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 10:35:22,216 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 10:35:22,216 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 10:35:22,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 10:35:22,217 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 10:35:22,217 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 10:35:22,217 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 10:35:22,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 10:35:22,217 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 10:35:22,217 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 10:35:22,218 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 10:35:22,218 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 10:35:22,218 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 10:35:22,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 10:35:22,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 10:35:22,219 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 10:35:22,219 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 10:35:22,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 10:35:22,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 10:35:22,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 10:35:22,220 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 10:35:22,220 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-09 10:35:22,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 10:35:22,220 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-09 10:35:22,220 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-09 10:35:22,220 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 10:35:22,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 10:35:22,543 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 10:35:22,547 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 10:35:22,549 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 10:35:22,549 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 10:35:22,550 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-1.i [2020-10-09 10:35:22,619 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/148f8e58f/e07a428b8d2f4b3abf04a629a776590d/FLAG865d43ee1 [2020-10-09 10:35:23,174 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 10:35:23,174 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i [2020-10-09 10:35:23,186 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/148f8e58f/e07a428b8d2f4b3abf04a629a776590d/FLAG865d43ee1 [2020-10-09 10:35:23,488 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/148f8e58f/e07a428b8d2f4b3abf04a629a776590d [2020-10-09 10:35:23,496 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 10:35:23,497 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 10:35:23,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 10:35:23,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 10:35:23,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 10:35:23,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 10:35:23" (1/1) ... [2020-10-09 10:35:23,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24e40238 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:23, skipping insertion in model container [2020-10-09 10:35:23,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 10:35:23" (1/1) ... [2020-10-09 10:35:23,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 10:35:23,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 10:35:23,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 10:35:23,973 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 10:35:24,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 10:35:24,098 INFO L208 MainTranslator]: Completed translation [2020-10-09 10:35:24,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:24 WrapperNode [2020-10-09 10:35:24,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 10:35:24,099 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 10:35:24,100 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 10:35:24,100 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 10:35:24,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:24" (1/1) ... [2020-10-09 10:35:24,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:24" (1/1) ... [2020-10-09 10:35:24,145 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 10:35:24,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 10:35:24,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 10:35:24,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 10:35:24,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:24" (1/1) ... [2020-10-09 10:35:24,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:24" (1/1) ... [2020-10-09 10:35:24,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:24" (1/1) ... [2020-10-09 10:35:24,172 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:24" (1/1) ... [2020-10-09 10:35:24,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:24" (1/1) ... [2020-10-09 10:35:24,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:24" (1/1) ... [2020-10-09 10:35:24,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:24" (1/1) ... [2020-10-09 10:35:24,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 10:35:24,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 10:35:24,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 10:35:24,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 10:35:24,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:24" (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 [2020-10-09 10:35:24,276 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-09 10:35:24,277 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-09 10:35:24,277 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-09 10:35:24,277 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-09 10:35:24,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 10:35:24,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 10:35:24,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 10:35:24,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 10:35:24,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 10:35:24,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 10:35:24,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 10:35:24,282 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-09 10:35:24,590 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 10:35:24,591 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-09 10:35:24,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 10:35:24 BoogieIcfgContainer [2020-10-09 10:35:24,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 10:35:24,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 10:35:24,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 10:35:24,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 10:35:24,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 10:35:23" (1/3) ... [2020-10-09 10:35:24,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730c2c47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 10:35:24, skipping insertion in model container [2020-10-09 10:35:24,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:24" (2/3) ... [2020-10-09 10:35:24,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730c2c47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 10:35:24, skipping insertion in model container [2020-10-09 10:35:24,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 10:35:24" (3/3) ... [2020-10-09 10:35:24,603 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench-1.i [2020-10-09 10:35:24,617 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-09 10:35:24,617 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 10:35:24,624 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 10:35:24,625 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 10:35:24,652 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,652 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,653 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,653 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,658 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,659 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,659 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,659 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,660 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,660 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,660 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,660 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,660 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,661 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,661 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,661 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,662 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,662 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,662 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,662 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,662 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,663 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,668 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,668 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,669 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,669 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,669 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,669 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,670 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,670 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,674 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,674 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,675 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,675 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,675 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,675 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,683 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,683 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,683 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,684 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,684 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,684 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,699 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-09 10:35:24,717 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 10:35:24,717 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-09 10:35:24,717 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 10:35:24,717 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 10:35:24,717 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 10:35:24,717 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 10:35:24,717 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 10:35:24,718 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 10:35:24,728 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-09 10:35:24,730 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-09 10:35:24,732 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-09 10:35:24,734 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-09 10:35:24,773 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-09 10:35:24,774 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 10:35:24,784 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. [2020-10-09 10:35:24,787 INFO L117 LiptonReduction]: Number of co-enabled transitions 1032 [2020-10-09 10:35:25,840 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-09 10:35:25,923 INFO L132 LiptonReduction]: Checked pairs total: 943 [2020-10-09 10:35:25,923 INFO L134 LiptonReduction]: Total number of compositions: 50 [2020-10-09 10:35:25,929 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-09 10:35:25,941 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-09 10:35:25,943 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-09 10:35:25,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-09 10:35:25,949 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:25,950 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-09 10:35:25,951 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:25,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:25,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-10-09 10:35:25,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:25,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938511865] [2020-10-09 10:35:25,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:26,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:26,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938511865] [2020-10-09 10:35:26,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 10:35:26,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-09 10:35:26,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349909155] [2020-10-09 10:35:26,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 10:35:26,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:26,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 10:35:26,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-09 10:35:26,185 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-09 10:35:26,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:26,249 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-09 10:35:26,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-09 10:35:26,251 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-09 10:35:26,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:26,262 INFO L225 Difference]: With dead ends: 83 [2020-10-09 10:35:26,263 INFO L226 Difference]: Without dead ends: 54 [2020-10-09 10:35:26,264 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-09 10:35:26,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-09 10:35:26,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-09 10:35:26,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-09 10:35:26,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-09 10:35:26,305 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-09 10:35:26,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:26,305 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-09 10:35:26,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 10:35:26,305 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-09 10:35:26,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-09 10:35:26,306 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:26,307 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:26,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-09 10:35:26,307 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:26,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:26,308 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-10-09 10:35:26,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:26,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910339119] [2020-10-09 10:35:26,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:26,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:26,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910339119] [2020-10-09 10:35:26,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 10:35:26,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-09 10:35:26,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156739254] [2020-10-09 10:35:26,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-09 10:35:26,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:26,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-09 10:35:26,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-09 10:35:26,436 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-09 10:35:26,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:26,488 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-09 10:35:26,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 10:35:26,489 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-09 10:35:26,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:26,490 INFO L225 Difference]: With dead ends: 80 [2020-10-09 10:35:26,491 INFO L226 Difference]: Without dead ends: 75 [2020-10-09 10:35:26,492 INFO L673 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 [2020-10-09 10:35:26,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-09 10:35:26,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-09 10:35:26,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-09 10:35:26,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-09 10:35:26,501 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-09 10:35:26,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:26,502 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-09 10:35:26,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-09 10:35:26,503 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-09 10:35:26,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-09 10:35:26,504 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:26,504 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:26,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-09 10:35:26,504 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:26,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:26,505 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-10-09 10:35:26,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:26,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123825260] [2020-10-09 10:35:26,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:26,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123825260] [2020-10-09 10:35:26,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 10:35:26,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-09 10:35:26,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046828304] [2020-10-09 10:35:26,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-09 10:35:26,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:26,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-09 10:35:26,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-09 10:35:26,576 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-09 10:35:26,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:26,601 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-10-09 10:35:26,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-09 10:35:26,602 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-09 10:35:26,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:26,603 INFO L225 Difference]: With dead ends: 73 [2020-10-09 10:35:26,603 INFO L226 Difference]: Without dead ends: 70 [2020-10-09 10:35:26,604 INFO L673 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 [2020-10-09 10:35:26,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-09 10:35:26,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-09 10:35:26,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-09 10:35:26,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-10-09 10:35:26,613 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-10-09 10:35:26,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:26,613 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-10-09 10:35:26,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-09 10:35:26,613 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-10-09 10:35:26,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-09 10:35:26,614 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:26,615 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:26,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-09 10:35:26,615 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:26,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:26,615 INFO L82 PathProgramCache]: Analyzing trace with hash -244724056, now seen corresponding path program 2 times [2020-10-09 10:35:26,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:26,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696095533] [2020-10-09 10:35:26,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:26,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:26,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696095533] [2020-10-09 10:35:26,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 10:35:26,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-09 10:35:26,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229834274] [2020-10-09 10:35:26,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-09 10:35:26,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:26,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-09 10:35:26,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-09 10:35:26,667 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-10-09 10:35:26,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:26,727 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-10-09 10:35:26,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 10:35:26,727 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-09 10:35:26,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:26,729 INFO L225 Difference]: With dead ends: 86 [2020-10-09 10:35:26,729 INFO L226 Difference]: Without dead ends: 80 [2020-10-09 10:35:26,729 INFO L673 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 [2020-10-09 10:35:26,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-09 10:35:26,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-09 10:35:26,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-09 10:35:26,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-09 10:35:26,738 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-09 10:35:26,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:26,738 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-09 10:35:26,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-09 10:35:26,739 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-09 10:35:26,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-09 10:35:26,740 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:26,740 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:26,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-09 10:35:26,740 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:26,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:26,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 2 times [2020-10-09 10:35:26,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:26,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328492750] [2020-10-09 10:35:26,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:26,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328492750] [2020-10-09 10:35:26,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133447669] [2020-10-09 10:35:26,813 INFO L93 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 [2020-10-09 10:35:26,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:26,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:26,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 10:35:26,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:26,961 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:35:26,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:26,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:26,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-09 10:35:26,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059048645] [2020-10-09 10:35:26,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 10:35:26,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:26,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 10:35:26,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-09 10:35:26,985 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-09 10:35:27,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:27,051 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-09 10:35:27,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:35:27,052 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-09 10:35:27,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:27,053 INFO L225 Difference]: With dead ends: 101 [2020-10-09 10:35:27,053 INFO L226 Difference]: Without dead ends: 96 [2020-10-09 10:35:27,054 INFO L673 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 [2020-10-09 10:35:27,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-09 10:35:27,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-09 10:35:27,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-09 10:35:27,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-09 10:35:27,061 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-09 10:35:27,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:27,061 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-09 10:35:27,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 10:35:27,062 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-09 10:35:27,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-09 10:35:27,063 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:27,063 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:27,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:27,277 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:27,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:27,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-10-09 10:35:27,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:27,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659302566] [2020-10-09 10:35:27,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:27,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:27,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659302566] [2020-10-09 10:35:27,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058112379] [2020-10-09 10:35:27,347 INFO L93 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 [2020-10-09 10:35:27,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:35:27,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:27,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 10:35:27,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:27,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:27,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:27,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-09 10:35:27,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606939072] [2020-10-09 10:35:27,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 10:35:27,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:27,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 10:35:27,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-09 10:35:27,492 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-09 10:35:27,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:27,531 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-09 10:35:27,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-09 10:35:27,532 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-09 10:35:27,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:27,533 INFO L225 Difference]: With dead ends: 84 [2020-10-09 10:35:27,533 INFO L226 Difference]: Without dead ends: 81 [2020-10-09 10:35:27,534 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-09 10:35:27,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-09 10:35:27,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-10-09 10:35:27,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-09 10:35:27,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-10-09 10:35:27,548 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-10-09 10:35:27,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:27,549 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-10-09 10:35:27,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 10:35:27,549 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-10-09 10:35:27,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-09 10:35:27,552 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:27,552 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:27,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:27,768 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:27,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:27,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1003489542, now seen corresponding path program 4 times [2020-10-09 10:35:27,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:27,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933044750] [2020-10-09 10:35:27,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:27,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933044750] [2020-10-09 10:35:27,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423194223] [2020-10-09 10:35:27,852 INFO L93 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 [2020-10-09 10:35:27,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:27,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:27,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 10:35:27,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:27,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:27,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-09 10:35:27,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104147806] [2020-10-09 10:35:27,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 10:35:27,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:27,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 10:35:27,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-09 10:35:27,977 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-10-09 10:35:28,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:28,026 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-10-09 10:35:28,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 10:35:28,027 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-09 10:35:28,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:28,028 INFO L225 Difference]: With dead ends: 90 [2020-10-09 10:35:28,028 INFO L226 Difference]: Without dead ends: 87 [2020-10-09 10:35:28,028 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-09 10:35:28,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-09 10:35:28,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-10-09 10:35:28,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-09 10:35:28,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-10-09 10:35:28,035 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-10-09 10:35:28,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:28,035 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-10-09 10:35:28,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 10:35:28,035 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-10-09 10:35:28,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-09 10:35:28,036 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:28,036 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:28,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:28,250 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:28,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:28,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1003511862, now seen corresponding path program 5 times [2020-10-09 10:35:28,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:28,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152242117] [2020-10-09 10:35:28,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:28,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152242117] [2020-10-09 10:35:28,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642294964] [2020-10-09 10:35:28,302 INFO L93 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 [2020-10-09 10:35:28,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:28,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:28,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 10:35:28,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:28,416 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:28,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:28,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:28,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-09 10:35:28,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520781811] [2020-10-09 10:35:28,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 10:35:28,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:28,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 10:35:28,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-09 10:35:28,428 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-10-09 10:35:28,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:28,515 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-09 10:35:28,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:35:28,516 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-09 10:35:28,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:28,517 INFO L225 Difference]: With dead ends: 99 [2020-10-09 10:35:28,517 INFO L226 Difference]: Without dead ends: 93 [2020-10-09 10:35:28,517 INFO L673 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 [2020-10-09 10:35:28,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-09 10:35:28,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-10-09 10:35:28,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-09 10:35:28,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-09 10:35:28,523 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-09 10:35:28,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:28,523 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-09 10:35:28,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 10:35:28,523 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-09 10:35:28,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 10:35:28,524 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:28,524 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:28,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:28,736 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:28,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:28,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-10-09 10:35:28,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:28,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049563544] [2020-10-09 10:35:28,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:28,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:28,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049563544] [2020-10-09 10:35:28,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 10:35:28,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-09 10:35:28,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301332125] [2020-10-09 10:35:28,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-09 10:35:28,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:28,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-09 10:35:28,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-09 10:35:28,792 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-09 10:35:28,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:28,817 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-10-09 10:35:28,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-09 10:35:28,817 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-09 10:35:28,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:28,818 INFO L225 Difference]: With dead ends: 92 [2020-10-09 10:35:28,818 INFO L226 Difference]: Without dead ends: 90 [2020-10-09 10:35:28,819 INFO L673 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 [2020-10-09 10:35:28,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-09 10:35:28,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-10-09 10:35:28,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-09 10:35:28,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-10-09 10:35:28,824 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-10-09 10:35:28,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:28,824 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-10-09 10:35:28,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-09 10:35:28,824 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-10-09 10:35:28,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 10:35:28,825 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:28,825 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:28,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-09 10:35:28,826 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:28,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:28,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 2 times [2020-10-09 10:35:28,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:28,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895885629] [2020-10-09 10:35:28,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:28,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895885629] [2020-10-09 10:35:28,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 10:35:28,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-09 10:35:28,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157463895] [2020-10-09 10:35:28,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-09 10:35:28,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:28,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-09 10:35:28,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-09 10:35:28,896 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-10-09 10:35:28,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:28,941 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-10-09 10:35:28,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 10:35:28,941 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-09 10:35:28,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:28,942 INFO L225 Difference]: With dead ends: 100 [2020-10-09 10:35:28,942 INFO L226 Difference]: Without dead ends: 98 [2020-10-09 10:35:28,943 INFO L673 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 [2020-10-09 10:35:28,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-09 10:35:28,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-09 10:35:28,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-09 10:35:28,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-10-09 10:35:28,948 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-10-09 10:35:28,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:28,949 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-10-09 10:35:28,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-09 10:35:28,949 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-10-09 10:35:28,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 10:35:28,950 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:28,950 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:28,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-09 10:35:28,950 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:28,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:28,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1490550578, now seen corresponding path program 3 times [2020-10-09 10:35:28,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:28,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033870559] [2020-10-09 10:35:28,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:29,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033870559] [2020-10-09 10:35:29,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 10:35:29,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-09 10:35:29,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192147949] [2020-10-09 10:35:29,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-09 10:35:29,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:29,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-09 10:35:29,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-09 10:35:29,021 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-10-09 10:35:29,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:29,090 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-09 10:35:29,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:35:29,091 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-09 10:35:29,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:29,092 INFO L225 Difference]: With dead ends: 105 [2020-10-09 10:35:29,092 INFO L226 Difference]: Without dead ends: 100 [2020-10-09 10:35:29,092 INFO L673 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 [2020-10-09 10:35:29,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-09 10:35:29,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-09 10:35:29,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-09 10:35:29,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-10-09 10:35:29,097 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-10-09 10:35:29,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:29,097 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-10-09 10:35:29,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-09 10:35:29,097 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-10-09 10:35:29,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 10:35:29,098 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:29,098 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:29,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-09 10:35:29,098 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:29,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:29,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-10-09 10:35:29,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:29,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920033879] [2020-10-09 10:35:29,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:29,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:29,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920033879] [2020-10-09 10:35:29,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 10:35:29,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-09 10:35:29,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779471311] [2020-10-09 10:35:29,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-09 10:35:29,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:29,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-09 10:35:29,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-09 10:35:29,143 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-10-09 10:35:29,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:29,213 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-09 10:35:29,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:35:29,213 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-09 10:35:29,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:29,214 INFO L225 Difference]: With dead ends: 105 [2020-10-09 10:35:29,214 INFO L226 Difference]: Without dead ends: 100 [2020-10-09 10:35:29,215 INFO L673 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 [2020-10-09 10:35:29,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-09 10:35:29,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-09 10:35:29,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-09 10:35:29,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-09 10:35:29,219 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-09 10:35:29,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:29,219 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-09 10:35:29,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-09 10:35:29,219 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-09 10:35:29,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 10:35:29,220 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:29,220 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:29,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-09 10:35:29,220 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:29,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:29,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1483163371, now seen corresponding path program 3 times [2020-10-09 10:35:29,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:29,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732337259] [2020-10-09 10:35:29,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:29,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732337259] [2020-10-09 10:35:29,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882559403] [2020-10-09 10:35:29,282 INFO L93 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 [2020-10-09 10:35:29,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:35:29,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:29,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:29,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:29,420 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:35:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:29,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:29,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-09 10:35:29,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920130774] [2020-10-09 10:35:29,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-09 10:35:29,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:29,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-09 10:35:29,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-09 10:35:29,449 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-09 10:35:29,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:29,528 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-09 10:35:29,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:35:29,528 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-09 10:35:29,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:29,530 INFO L225 Difference]: With dead ends: 122 [2020-10-09 10:35:29,530 INFO L226 Difference]: Without dead ends: 117 [2020-10-09 10:35:29,530 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-09 10:35:29,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-09 10:35:29,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-09 10:35:29,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-09 10:35:29,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-09 10:35:29,534 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-09 10:35:29,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:29,535 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-09 10:35:29,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-09 10:35:29,535 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-09 10:35:29,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 10:35:29,535 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:29,535 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:29,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-09 10:35:29,746 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:29,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:29,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-10-09 10:35:29,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:29,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045319682] [2020-10-09 10:35:29,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:29,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:29,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045319682] [2020-10-09 10:35:29,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394590839] [2020-10-09 10:35:29,822 INFO L93 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 [2020-10-09 10:35:29,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:35:29,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:29,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:29,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:29,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:29,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:29,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:29,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8882135] [2020-10-09 10:35:29,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:29,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:29,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:29,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:29,938 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-09 10:35:29,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:29,974 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-09 10:35:29,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 10:35:29,976 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-09 10:35:29,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:29,977 INFO L225 Difference]: With dead ends: 108 [2020-10-09 10:35:29,977 INFO L226 Difference]: Without dead ends: 105 [2020-10-09 10:35:29,978 INFO L673 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 [2020-10-09 10:35:29,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-09 10:35:29,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-09 10:35:29,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-09 10:35:29,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-10-09 10:35:29,982 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-10-09 10:35:29,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:29,982 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-10-09 10:35:29,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:29,982 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-10-09 10:35:29,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 10:35:29,982 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:29,982 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:30,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:30,184 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:30,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:30,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1043405416, now seen corresponding path program 7 times [2020-10-09 10:35:30,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:30,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853876225] [2020-10-09 10:35:30,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:30,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:30,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853876225] [2020-10-09 10:35:30,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439127457] [2020-10-09 10:35:30,249 INFO L93 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 [2020-10-09 10:35:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:30,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:30,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:30,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:30,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:30,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947006956] [2020-10-09 10:35:30,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:30,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:30,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:30,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:30,349 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-10-09 10:35:30,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:30,407 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-10-09 10:35:30,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 10:35:30,407 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-09 10:35:30,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:30,409 INFO L225 Difference]: With dead ends: 116 [2020-10-09 10:35:30,409 INFO L226 Difference]: Without dead ends: 113 [2020-10-09 10:35:30,410 INFO L673 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 [2020-10-09 10:35:30,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-09 10:35:30,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-10-09 10:35:30,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-09 10:35:30,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-10-09 10:35:30,414 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-10-09 10:35:30,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:30,414 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-10-09 10:35:30,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:30,414 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-10-09 10:35:30,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 10:35:30,415 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:30,415 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:30,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-09 10:35:30,628 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:30,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:30,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1044097336, now seen corresponding path program 8 times [2020-10-09 10:35:30,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:30,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579047352] [2020-10-09 10:35:30,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:30,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579047352] [2020-10-09 10:35:30,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6538946] [2020-10-09 10:35:30,701 INFO L93 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 [2020-10-09 10:35:30,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:30,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:30,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:30,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:30,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:30,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:30,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:30,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030028550] [2020-10-09 10:35:30,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:30,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:30,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:30,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:30,835 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-10-09 10:35:30,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:30,932 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-10-09 10:35:30,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:35:30,932 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-09 10:35:30,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:30,934 INFO L225 Difference]: With dead ends: 115 [2020-10-09 10:35:30,934 INFO L226 Difference]: Without dead ends: 112 [2020-10-09 10:35:30,935 INFO L673 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 [2020-10-09 10:35:30,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-09 10:35:30,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-10-09 10:35:30,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-09 10:35:30,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-10-09 10:35:30,939 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-10-09 10:35:30,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:30,940 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-10-09 10:35:30,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:30,940 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-10-09 10:35:30,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 10:35:30,940 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:30,940 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:31,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-09 10:35:31,144 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:31,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:31,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1044119656, now seen corresponding path program 9 times [2020-10-09 10:35:31,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:31,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986686798] [2020-10-09 10:35:31,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:31,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986686798] [2020-10-09 10:35:31,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743111206] [2020-10-09 10:35:31,226 INFO L93 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 [2020-10-09 10:35:31,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:35:31,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:31,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:31,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:31,327 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:31,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:31,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:31,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:31,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802944247] [2020-10-09 10:35:31,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:31,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:31,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:31,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:31,338 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-10-09 10:35:31,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:31,442 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-10-09 10:35:31,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:35:31,443 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-09 10:35:31,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:31,444 INFO L225 Difference]: With dead ends: 124 [2020-10-09 10:35:31,444 INFO L226 Difference]: Without dead ends: 118 [2020-10-09 10:35:31,445 INFO L673 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 [2020-10-09 10:35:31,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-09 10:35:31,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-10-09 10:35:31,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-09 10:35:31,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-09 10:35:31,449 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-09 10:35:31,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:31,449 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-09 10:35:31,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:31,449 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-09 10:35:31,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:31,450 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:31,450 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:31,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-09 10:35:31,662 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:31,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:31,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-10-09 10:35:31,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:31,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48928378] [2020-10-09 10:35:31,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:31,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:31,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48928378] [2020-10-09 10:35:31,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839288738] [2020-10-09 10:35:31,724 INFO L93 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 [2020-10-09 10:35:31,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:31,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:31,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:31,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:31,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:31,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:31,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115916080] [2020-10-09 10:35:31,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:31,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:31,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:31,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:31,831 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-09 10:35:31,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:31,873 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-10-09 10:35:31,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 10:35:31,874 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:31,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:31,875 INFO L225 Difference]: With dead ends: 113 [2020-10-09 10:35:31,875 INFO L226 Difference]: Without dead ends: 111 [2020-10-09 10:35:31,875 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:31,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-09 10:35:31,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-09 10:35:31,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-09 10:35:31,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-10-09 10:35:31,878 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-10-09 10:35:31,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:31,879 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-10-09 10:35:31,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:31,879 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-10-09 10:35:31,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:31,879 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:31,880 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:32,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-09 10:35:32,080 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:32,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:32,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 6 times [2020-10-09 10:35:32,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:32,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786732255] [2020-10-09 10:35:32,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:32,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:32,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786732255] [2020-10-09 10:35:32,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130088355] [2020-10-09 10:35:32,141 INFO L93 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 [2020-10-09 10:35:32,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:35:32,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:32,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:32,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:32,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:32,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:32,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:32,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040478491] [2020-10-09 10:35:32,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:32,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:32,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:32,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:32,274 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-10-09 10:35:32,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:32,346 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-10-09 10:35:32,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 10:35:32,347 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:32,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:32,349 INFO L225 Difference]: With dead ends: 118 [2020-10-09 10:35:32,349 INFO L226 Difference]: Without dead ends: 116 [2020-10-09 10:35:32,349 INFO L673 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 [2020-10-09 10:35:32,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-09 10:35:32,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-10-09 10:35:32,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-09 10:35:32,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-10-09 10:35:32,355 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-10-09 10:35:32,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:32,356 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-10-09 10:35:32,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:32,356 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-10-09 10:35:32,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:32,357 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:32,357 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:32,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:32,571 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:32,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:32,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 7 times [2020-10-09 10:35:32,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:32,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230911916] [2020-10-09 10:35:32,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:32,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:32,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230911916] [2020-10-09 10:35:32,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200264932] [2020-10-09 10:35:32,636 INFO L93 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 [2020-10-09 10:35:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:32,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:32,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:32,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:32,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:32,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501340638] [2020-10-09 10:35:32,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:32,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:32,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:32,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:32,755 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-10-09 10:35:32,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:32,820 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-10-09 10:35:32,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 10:35:32,821 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:32,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:32,822 INFO L225 Difference]: With dead ends: 119 [2020-10-09 10:35:32,822 INFO L226 Difference]: Without dead ends: 117 [2020-10-09 10:35:32,823 INFO L673 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 [2020-10-09 10:35:32,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-09 10:35:32,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-09 10:35:32,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-09 10:35:32,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-10-09 10:35:32,828 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-10-09 10:35:32,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:32,828 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-10-09 10:35:32,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:32,828 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-10-09 10:35:32,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:32,829 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:32,829 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:33,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:33,041 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:33,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:33,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 8 times [2020-10-09 10:35:33,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:33,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222692380] [2020-10-09 10:35:33,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:33,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:33,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222692380] [2020-10-09 10:35:33,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396604003] [2020-10-09 10:35:33,127 INFO L93 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 [2020-10-09 10:35:33,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:33,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:33,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:33,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:33,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:33,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:33,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145925675] [2020-10-09 10:35:33,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:33,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:33,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:33,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:33,278 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-10-09 10:35:33,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:33,340 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-10-09 10:35:33,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 10:35:33,340 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:33,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:33,342 INFO L225 Difference]: With dead ends: 122 [2020-10-09 10:35:33,342 INFO L226 Difference]: Without dead ends: 120 [2020-10-09 10:35:33,342 INFO L673 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 [2020-10-09 10:35:33,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-09 10:35:33,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-10-09 10:35:33,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-09 10:35:33,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-10-09 10:35:33,347 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-10-09 10:35:33,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:33,347 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-10-09 10:35:33,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:33,348 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-10-09 10:35:33,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:33,348 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:33,348 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:33,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-09 10:35:33,559 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:33,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:33,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 9 times [2020-10-09 10:35:33,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:33,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886990637] [2020-10-09 10:35:33,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:33,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886990637] [2020-10-09 10:35:33,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130602740] [2020-10-09 10:35:33,618 INFO L93 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 [2020-10-09 10:35:33,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:35:33,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:33,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:33,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:33,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:33,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:33,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:33,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984303036] [2020-10-09 10:35:33,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:33,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:33,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:33,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:33,729 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-10-09 10:35:33,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:33,828 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-10-09 10:35:33,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:35:33,828 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:33,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:33,829 INFO L225 Difference]: With dead ends: 123 [2020-10-09 10:35:33,830 INFO L226 Difference]: Without dead ends: 121 [2020-10-09 10:35:33,830 INFO L673 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 [2020-10-09 10:35:33,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-09 10:35:33,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-10-09 10:35:33,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-09 10:35:33,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-10-09 10:35:33,838 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-10-09 10:35:33,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:33,838 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-10-09 10:35:33,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:33,838 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-10-09 10:35:33,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:33,839 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:33,839 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:34,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:34,050 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:34,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:34,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 10 times [2020-10-09 10:35:34,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:34,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466263342] [2020-10-09 10:35:34,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:34,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:34,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466263342] [2020-10-09 10:35:34,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977243245] [2020-10-09 10:35:34,155 INFO L93 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 [2020-10-09 10:35:34,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:34,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:34,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:34,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:34,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:34,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:34,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:34,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993789689] [2020-10-09 10:35:34,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:34,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:34,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:34,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:34,273 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-10-09 10:35:34,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:34,334 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-09 10:35:34,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:35:34,334 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:34,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:34,335 INFO L225 Difference]: With dead ends: 123 [2020-10-09 10:35:34,335 INFO L226 Difference]: Without dead ends: 121 [2020-10-09 10:35:34,336 INFO L673 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 [2020-10-09 10:35:34,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-09 10:35:34,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-10-09 10:35:34,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-09 10:35:34,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-10-09 10:35:34,340 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-10-09 10:35:34,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:34,340 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-10-09 10:35:34,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:34,340 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-10-09 10:35:34,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:34,341 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:34,341 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:34,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-09 10:35:34,552 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:34,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:34,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1037565553, now seen corresponding path program 11 times [2020-10-09 10:35:34,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:34,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770002730] [2020-10-09 10:35:34,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:34,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770002730] [2020-10-09 10:35:34,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12541962] [2020-10-09 10:35:34,602 INFO L93 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 [2020-10-09 10:35:34,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:34,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:34,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:34,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:34,709 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:34,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:34,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:34,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:34,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733560320] [2020-10-09 10:35:34,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:34,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:34,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:34,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:34,752 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-10-09 10:35:34,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:34,924 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-10-09 10:35:34,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:35:34,925 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:34,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:34,927 INFO L225 Difference]: With dead ends: 133 [2020-10-09 10:35:34,927 INFO L226 Difference]: Without dead ends: 128 [2020-10-09 10:35:34,928 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:35:34,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-09 10:35:34,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-10-09 10:35:34,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-09 10:35:34,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-10-09 10:35:34,932 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-10-09 10:35:34,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:34,932 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-10-09 10:35:34,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:34,932 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-10-09 10:35:34,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:34,933 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:34,933 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:35,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:35,144 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:35,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:35,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1037573024, now seen corresponding path program 12 times [2020-10-09 10:35:35,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:35,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488578811] [2020-10-09 10:35:35,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:35,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:35,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488578811] [2020-10-09 10:35:35,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949026271] [2020-10-09 10:35:35,215 INFO L93 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 [2020-10-09 10:35:35,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:35:35,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:35,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:35,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:35,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:35,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:35,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:35,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577909735] [2020-10-09 10:35:35,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:35,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:35,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:35,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:35,331 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-10-09 10:35:35,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:35,433 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-10-09 10:35:35,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:35:35,434 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:35,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:35,435 INFO L225 Difference]: With dead ends: 127 [2020-10-09 10:35:35,435 INFO L226 Difference]: Without dead ends: 125 [2020-10-09 10:35:35,435 INFO L673 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 [2020-10-09 10:35:35,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-09 10:35:35,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-10-09 10:35:35,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-09 10:35:35,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-09 10:35:35,440 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-09 10:35:35,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:35,440 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-09 10:35:35,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:35,441 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-09 10:35:35,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:35,441 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:35,441 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:35,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-09 10:35:35,652 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:35,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:35,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 13 times [2020-10-09 10:35:35,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:35,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213706902] [2020-10-09 10:35:35,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:35,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:35,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213706902] [2020-10-09 10:35:35,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714886180] [2020-10-09 10:35:35,704 INFO L93 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 [2020-10-09 10:35:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:35,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:35,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:35,818 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:35:35,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:35,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:35,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:35,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330094639] [2020-10-09 10:35:35,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:35,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:35,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:35,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:35,837 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-09 10:35:36,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:36,053 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-10-09 10:35:36,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:35:36,053 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:36,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:36,055 INFO L225 Difference]: With dead ends: 141 [2020-10-09 10:35:36,055 INFO L226 Difference]: Without dead ends: 136 [2020-10-09 10:35:36,056 INFO L673 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 [2020-10-09 10:35:36,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-09 10:35:36,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-10-09 10:35:36,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-09 10:35:36,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-09 10:35:36,061 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-09 10:35:36,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:36,061 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-09 10:35:36,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:36,062 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-09 10:35:36,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:36,065 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:36,065 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:36,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-09 10:35:36,266 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:36,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:36,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1037595344, now seen corresponding path program 14 times [2020-10-09 10:35:36,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:36,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88821578] [2020-10-09 10:35:36,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:36,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:36,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88821578] [2020-10-09 10:35:36,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492182718] [2020-10-09 10:35:36,317 INFO L93 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 [2020-10-09 10:35:36,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:36,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:36,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:36,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:36,409 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:36,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:36,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:36,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256065328] [2020-10-09 10:35:36,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:36,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:36,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:36,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:36,422 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-09 10:35:36,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:36,569 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-10-09 10:35:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:35:36,569 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:36,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:36,570 INFO L225 Difference]: With dead ends: 136 [2020-10-09 10:35:36,570 INFO L226 Difference]: Without dead ends: 131 [2020-10-09 10:35:36,571 INFO L673 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 [2020-10-09 10:35:36,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-09 10:35:36,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-10-09 10:35:36,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-09 10:35:36,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-10-09 10:35:36,575 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-10-09 10:35:36,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:36,576 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-10-09 10:35:36,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:36,576 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-10-09 10:35:36,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:36,577 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:36,577 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:36,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-09 10:35:36,788 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:36,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:36,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1037803664, now seen corresponding path program 15 times [2020-10-09 10:35:36,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:36,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904380339] [2020-10-09 10:35:36,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:36,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904380339] [2020-10-09 10:35:36,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160200151] [2020-10-09 10:35:36,851 INFO L93 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 [2020-10-09 10:35:36,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:35:36,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:36,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:36,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:36,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:36,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:36,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229222960] [2020-10-09 10:35:36,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:36,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:36,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:36,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:36,975 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-10-09 10:35:37,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:37,064 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-10-09 10:35:37,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:35:37,064 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:37,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:37,066 INFO L225 Difference]: With dead ends: 130 [2020-10-09 10:35:37,066 INFO L226 Difference]: Without dead ends: 128 [2020-10-09 10:35:37,069 INFO L673 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 [2020-10-09 10:35:37,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-09 10:35:37,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-10-09 10:35:37,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-09 10:35:37,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-09 10:35:37,074 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-09 10:35:37,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:37,075 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-09 10:35:37,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:37,075 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-09 10:35:37,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:37,078 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:37,078 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:37,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-09 10:35:37,291 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:37,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:37,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 16 times [2020-10-09 10:35:37,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:37,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826717621] [2020-10-09 10:35:37,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:37,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826717621] [2020-10-09 10:35:37,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914500769] [2020-10-09 10:35:37,348 INFO L93 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 [2020-10-09 10:35:37,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:37,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:37,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:37,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:37,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:37,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:37,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:37,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194249017] [2020-10-09 10:35:37,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:37,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:37,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:37,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:37,501 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-09 10:35:37,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:37,602 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-10-09 10:35:37,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:35:37,602 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:37,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:37,604 INFO L225 Difference]: With dead ends: 131 [2020-10-09 10:35:37,604 INFO L226 Difference]: Without dead ends: 129 [2020-10-09 10:35:37,605 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-10-09 10:35:37,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-09 10:35:37,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-10-09 10:35:37,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-09 10:35:37,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-09 10:35:37,610 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-09 10:35:37,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:37,611 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-09 10:35:37,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:37,611 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-09 10:35:37,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:37,612 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:37,612 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:37,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-09 10:35:37,823 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:37,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:37,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 17 times [2020-10-09 10:35:37,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:37,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275474893] [2020-10-09 10:35:37,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:37,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275474893] [2020-10-09 10:35:37,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137810979] [2020-10-09 10:35:37,879 INFO L93 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 [2020-10-09 10:35:37,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:37,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:37,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:37,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:37,965 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:35:37,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:37,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:37,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:37,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134985902] [2020-10-09 10:35:37,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:37,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:37,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:37,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:37,974 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-09 10:35:38,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:38,103 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-09 10:35:38,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:35:38,103 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:38,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:38,104 INFO L225 Difference]: With dead ends: 131 [2020-10-09 10:35:38,104 INFO L226 Difference]: Without dead ends: 126 [2020-10-09 10:35:38,105 INFO L673 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 [2020-10-09 10:35:38,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-09 10:35:38,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-10-09 10:35:38,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-09 10:35:38,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-09 10:35:38,109 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-09 10:35:38,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:38,109 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-09 10:35:38,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:38,109 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-09 10:35:38,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:38,110 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:38,110 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:38,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:38,311 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:38,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:38,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1038489074, now seen corresponding path program 18 times [2020-10-09 10:35:38,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:38,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607219018] [2020-10-09 10:35:38,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:38,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:38,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607219018] [2020-10-09 10:35:38,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277783546] [2020-10-09 10:35:38,357 INFO L93 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 [2020-10-09 10:35:38,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:35:38,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:38,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:38,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:38,447 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:38,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:38,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:38,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358464436] [2020-10-09 10:35:38,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:38,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:38,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:38,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:38,455 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-09 10:35:38,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:38,670 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-10-09 10:35:38,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:35:38,671 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:38,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:38,672 INFO L225 Difference]: With dead ends: 145 [2020-10-09 10:35:38,672 INFO L226 Difference]: Without dead ends: 140 [2020-10-09 10:35:38,673 INFO L673 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 [2020-10-09 10:35:38,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-09 10:35:38,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-10-09 10:35:38,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-09 10:35:38,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-09 10:35:38,677 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-09 10:35:38,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:38,677 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-09 10:35:38,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:38,677 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-09 10:35:38,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:38,678 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:38,678 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:38,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-09 10:35:38,884 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:38,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:38,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1038517904, now seen corresponding path program 19 times [2020-10-09 10:35:38,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:38,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900474739] [2020-10-09 10:35:38,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:38,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:38,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900474739] [2020-10-09 10:35:38,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536338055] [2020-10-09 10:35:38,938 INFO L93 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 [2020-10-09 10:35:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:38,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:38,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:39,028 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:35:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:39,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:39,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:39,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105872607] [2020-10-09 10:35:39,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:39,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:39,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:39,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:39,041 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-09 10:35:39,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:39,193 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-10-09 10:35:39,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:35:39,193 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:39,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:39,195 INFO L225 Difference]: With dead ends: 135 [2020-10-09 10:35:39,195 INFO L226 Difference]: Without dead ends: 130 [2020-10-09 10:35:39,195 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:35:39,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-09 10:35:39,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-10-09 10:35:39,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-09 10:35:39,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-09 10:35:39,200 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-09 10:35:39,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:39,200 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-09 10:35:39,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:39,200 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-09 10:35:39,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:39,201 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:39,201 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:39,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:39,407 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:39,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:39,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1266597800, now seen corresponding path program 4 times [2020-10-09 10:35:39,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:39,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456288269] [2020-10-09 10:35:39,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:39,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:39,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456288269] [2020-10-09 10:35:39,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909718894] [2020-10-09 10:35:39,466 INFO L93 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 [2020-10-09 10:35:39,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:39,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:39,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:39,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:39,644 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:35:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:39,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:39,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-09 10:35:39,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592253100] [2020-10-09 10:35:39,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-09 10:35:39,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:39,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-09 10:35:39,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-09 10:35:39,670 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-09 10:35:39,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:39,781 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-09 10:35:39,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:35:39,782 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-09 10:35:39,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:39,783 INFO L225 Difference]: With dead ends: 143 [2020-10-09 10:35:39,783 INFO L226 Difference]: Without dead ends: 138 [2020-10-09 10:35:39,783 INFO L673 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 [2020-10-09 10:35:39,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-09 10:35:39,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-09 10:35:39,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-09 10:35:39,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-09 10:35:39,789 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-09 10:35:39,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:39,789 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-09 10:35:39,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-09 10:35:39,790 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-09 10:35:39,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:39,790 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:39,790 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:40,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-09 10:35:40,001 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:40,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:40,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 10 times [2020-10-09 10:35:40,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:40,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345098407] [2020-10-09 10:35:40,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:40,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:40,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345098407] [2020-10-09 10:35:40,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313293827] [2020-10-09 10:35:40,101 INFO L93 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 [2020-10-09 10:35:40,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:40,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:40,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:40,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:40,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:40,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:40,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943824168] [2020-10-09 10:35:40,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:40,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:40,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:40,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:40,232 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-09 10:35:40,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:40,280 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-10-09 10:35:40,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 10:35:40,281 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-09 10:35:40,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:40,281 INFO L225 Difference]: With dead ends: 132 [2020-10-09 10:35:40,282 INFO L226 Difference]: Without dead ends: 129 [2020-10-09 10:35:40,282 INFO L673 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 [2020-10-09 10:35:40,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-09 10:35:40,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-09 10:35:40,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-09 10:35:40,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-09 10:35:40,285 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-09 10:35:40,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:40,285 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-09 10:35:40,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:40,286 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-09 10:35:40,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:40,286 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:40,286 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:40,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-09 10:35:40,494 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:40,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:40,494 INFO L82 PathProgramCache]: Analyzing trace with hash -2014169786, now seen corresponding path program 11 times [2020-10-09 10:35:40,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:40,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48038818] [2020-10-09 10:35:40,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:40,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48038818] [2020-10-09 10:35:40,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439372992] [2020-10-09 10:35:40,569 INFO L93 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 [2020-10-09 10:35:40,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:35:40,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:40,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:40,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:40,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:40,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:40,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783020684] [2020-10-09 10:35:40,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:40,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:40,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:40,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:40,726 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-09 10:35:40,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:40,783 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-10-09 10:35:40,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:35:40,783 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-09 10:35:40,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:40,784 INFO L225 Difference]: With dead ends: 143 [2020-10-09 10:35:40,784 INFO L226 Difference]: Without dead ends: 140 [2020-10-09 10:35:40,785 INFO L673 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 [2020-10-09 10:35:40,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-09 10:35:40,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-10-09 10:35:40,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-09 10:35:40,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-09 10:35:40,790 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-09 10:35:40,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:40,790 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-09 10:35:40,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:40,790 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-09 10:35:40,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:40,791 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:40,791 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:40,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-09 10:35:40,992 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:40,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:40,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1992720266, now seen corresponding path program 12 times [2020-10-09 10:35:40,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:40,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256400548] [2020-10-09 10:35:40,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:41,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:41,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256400548] [2020-10-09 10:35:41,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480462121] [2020-10-09 10:35:41,061 INFO L93 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 [2020-10-09 10:35:41,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:35:41,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:41,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:41,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:41,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:41,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:41,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:41,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135130768] [2020-10-09 10:35:41,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:41,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:41,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:41,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:41,193 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-09 10:35:41,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:41,271 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-10-09 10:35:41,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:35:41,271 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-09 10:35:41,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:41,273 INFO L225 Difference]: With dead ends: 142 [2020-10-09 10:35:41,273 INFO L226 Difference]: Without dead ends: 139 [2020-10-09 10:35:41,274 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:35:41,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-09 10:35:41,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-10-09 10:35:41,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-09 10:35:41,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-09 10:35:41,279 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-10-09 10:35:41,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:41,279 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-09 10:35:41,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:41,280 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-09 10:35:41,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:41,280 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:41,280 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:41,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-09 10:35:41,493 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:41,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:41,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1992028346, now seen corresponding path program 13 times [2020-10-09 10:35:41,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:41,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729750336] [2020-10-09 10:35:41,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:41,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:41,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729750336] [2020-10-09 10:35:41,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608020848] [2020-10-09 10:35:41,565 INFO L93 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 [2020-10-09 10:35:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:41,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:41,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:41,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:41,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:41,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124163355] [2020-10-09 10:35:41,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:41,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:41,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:41,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:41,708 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-09 10:35:41,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:41,801 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-10-09 10:35:41,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:35:41,801 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-09 10:35:41,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:41,802 INFO L225 Difference]: With dead ends: 141 [2020-10-09 10:35:41,802 INFO L226 Difference]: Without dead ends: 138 [2020-10-09 10:35:41,803 INFO L673 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 [2020-10-09 10:35:41,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-09 10:35:41,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-10-09 10:35:41,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-09 10:35:41,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-10-09 10:35:41,806 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-10-09 10:35:41,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:41,807 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-10-09 10:35:41,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:41,807 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-10-09 10:35:41,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:41,807 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:41,807 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:42,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-09 10:35:42,008 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:42,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:42,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1992006026, now seen corresponding path program 14 times [2020-10-09 10:35:42,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:42,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229136557] [2020-10-09 10:35:42,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:42,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:42,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:42,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229136557] [2020-10-09 10:35:42,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460525676] [2020-10-09 10:35:42,060 INFO L93 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 [2020-10-09 10:35:42,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:42,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:42,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:42,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:42,211 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:42,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:42,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:42,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227775590] [2020-10-09 10:35:42,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:42,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:42,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:42,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:42,225 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-10-09 10:35:42,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:42,409 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-09 10:35:42,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:35:42,409 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-09 10:35:42,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:42,411 INFO L225 Difference]: With dead ends: 150 [2020-10-09 10:35:42,411 INFO L226 Difference]: Without dead ends: 144 [2020-10-09 10:35:42,412 INFO L673 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 [2020-10-09 10:35:42,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-09 10:35:42,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-10-09 10:35:42,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-09 10:35:42,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-09 10:35:42,417 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-09 10:35:42,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:42,418 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-09 10:35:42,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:42,418 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-09 10:35:42,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:42,419 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:42,419 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:42,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:42,631 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:42,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:42,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 20 times [2020-10-09 10:35:42,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:42,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872664701] [2020-10-09 10:35:42,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:42,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:42,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872664701] [2020-10-09 10:35:42,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258899886] [2020-10-09 10:35:42,718 INFO L93 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 [2020-10-09 10:35:42,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:42,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:42,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:42,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:42,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:42,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:42,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:42,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686012307] [2020-10-09 10:35:42,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:42,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:42,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:42,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:42,894 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-09 10:35:42,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:42,935 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-10-09 10:35:42,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 10:35:42,936 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:42,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:42,937 INFO L225 Difference]: With dead ends: 138 [2020-10-09 10:35:42,937 INFO L226 Difference]: Without dead ends: 136 [2020-10-09 10:35:42,937 INFO L673 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 [2020-10-09 10:35:42,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-09 10:35:42,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-10-09 10:35:42,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-09 10:35:42,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-10-09 10:35:42,940 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-10-09 10:35:42,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:42,941 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-10-09 10:35:42,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:42,941 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-10-09 10:35:42,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:42,941 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:42,941 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:43,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-09 10:35:43,151 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:43,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:43,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 21 times [2020-10-09 10:35:43,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:43,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186269133] [2020-10-09 10:35:43,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:43,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:43,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186269133] [2020-10-09 10:35:43,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209173801] [2020-10-09 10:35:43,216 INFO L93 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 [2020-10-09 10:35:43,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:35:43,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:43,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:43,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:43,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:43,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:43,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684194643] [2020-10-09 10:35:43,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:43,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:43,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:43,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:43,353 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-10-09 10:35:43,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:43,462 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-10-09 10:35:43,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:35:43,466 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:43,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:43,467 INFO L225 Difference]: With dead ends: 145 [2020-10-09 10:35:43,467 INFO L226 Difference]: Without dead ends: 143 [2020-10-09 10:35:43,467 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-10-09 10:35:43,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-09 10:35:43,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-10-09 10:35:43,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-09 10:35:43,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-10-09 10:35:43,471 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-10-09 10:35:43,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:43,471 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-10-09 10:35:43,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:43,471 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-10-09 10:35:43,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:43,472 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:43,472 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:43,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-09 10:35:43,682 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:43,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:43,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 22 times [2020-10-09 10:35:43,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:43,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319620978] [2020-10-09 10:35:43,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:43,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:43,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319620978] [2020-10-09 10:35:43,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304156702] [2020-10-09 10:35:43,743 INFO L93 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 [2020-10-09 10:35:43,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:43,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:43,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:43,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:43,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:43,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:43,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752839486] [2020-10-09 10:35:43,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:43,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:43,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:43,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:43,898 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-10-09 10:35:44,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:44,009 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-09 10:35:44,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:35:44,009 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:44,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:44,010 INFO L225 Difference]: With dead ends: 150 [2020-10-09 10:35:44,010 INFO L226 Difference]: Without dead ends: 148 [2020-10-09 10:35:44,011 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:35:44,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-09 10:35:44,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-10-09 10:35:44,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-09 10:35:44,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-10-09 10:35:44,014 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-10-09 10:35:44,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:44,015 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-10-09 10:35:44,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:44,015 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-10-09 10:35:44,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:44,015 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:44,015 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:44,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:44,223 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:44,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:44,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 23 times [2020-10-09 10:35:44,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:44,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193967533] [2020-10-09 10:35:44,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:44,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:44,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193967533] [2020-10-09 10:35:44,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633556786] [2020-10-09 10:35:44,301 INFO L93 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 [2020-10-09 10:35:44,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:35:44,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:44,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:44,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:44,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:44,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:44,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:44,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895149442] [2020-10-09 10:35:44,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:44,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:44,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:44,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:44,446 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-10-09 10:35:44,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:44,560 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-10-09 10:35:44,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:35:44,560 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:44,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:44,561 INFO L225 Difference]: With dead ends: 148 [2020-10-09 10:35:44,561 INFO L226 Difference]: Without dead ends: 146 [2020-10-09 10:35:44,562 INFO L673 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 [2020-10-09 10:35:44,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-09 10:35:44,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-10-09 10:35:44,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-09 10:35:44,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-09 10:35:44,565 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-09 10:35:44,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:44,566 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-09 10:35:44,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:44,567 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-09 10:35:44,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:44,567 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:44,567 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:44,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-09 10:35:44,768 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:44,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:44,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1442208078, now seen corresponding path program 24 times [2020-10-09 10:35:44,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:44,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957506764] [2020-10-09 10:35:44,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:44,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:44,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957506764] [2020-10-09 10:35:44,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068945786] [2020-10-09 10:35:44,837 INFO L93 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 [2020-10-09 10:35:44,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:35:44,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:44,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:44,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:44,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:44,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:44,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995588242] [2020-10-09 10:35:44,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:44,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:44,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:44,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:44,958 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-09 10:35:45,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:45,079 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-10-09 10:35:45,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:35:45,079 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:45,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:45,081 INFO L225 Difference]: With dead ends: 149 [2020-10-09 10:35:45,081 INFO L226 Difference]: Without dead ends: 147 [2020-10-09 10:35:45,081 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:35:45,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-09 10:35:45,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-10-09 10:35:45,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-09 10:35:45,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-10-09 10:35:45,086 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-10-09 10:35:45,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:45,087 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-10-09 10:35:45,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:45,088 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-10-09 10:35:45,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:45,088 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:45,088 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:45,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:45,298 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:45,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:45,299 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 25 times [2020-10-09 10:35:45,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:45,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831975873] [2020-10-09 10:35:45,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:45,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:45,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831975873] [2020-10-09 10:35:45,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732395140] [2020-10-09 10:35:45,389 INFO L93 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 [2020-10-09 10:35:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:45,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:45,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:45,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:45,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:45,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536154673] [2020-10-09 10:35:45,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:45,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:45,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:45,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:45,516 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-10-09 10:35:45,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:45,567 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-10-09 10:35:45,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:35:45,567 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:45,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:45,568 INFO L225 Difference]: With dead ends: 152 [2020-10-09 10:35:45,568 INFO L226 Difference]: Without dead ends: 150 [2020-10-09 10:35:45,568 INFO L673 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 [2020-10-09 10:35:45,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-09 10:35:45,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-10-09 10:35:45,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-09 10:35:45,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-10-09 10:35:45,571 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-10-09 10:35:45,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:45,572 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-10-09 10:35:45,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:45,572 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-10-09 10:35:45,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:45,572 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:45,572 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:45,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-09 10:35:45,773 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:45,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:45,774 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 26 times [2020-10-09 10:35:45,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:45,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898570094] [2020-10-09 10:35:45,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:45,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:45,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898570094] [2020-10-09 10:35:45,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134741999] [2020-10-09 10:35:45,851 INFO L93 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 [2020-10-09 10:35:45,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:45,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:45,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:45,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:45,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:45,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:45,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707661262] [2020-10-09 10:35:45,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:45,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:45,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:45,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:45,984 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-10-09 10:35:46,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:46,120 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-10-09 10:35:46,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:35:46,121 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:46,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:46,122 INFO L225 Difference]: With dead ends: 153 [2020-10-09 10:35:46,122 INFO L226 Difference]: Without dead ends: 151 [2020-10-09 10:35:46,122 INFO L673 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 [2020-10-09 10:35:46,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-09 10:35:46,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-10-09 10:35:46,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-09 10:35:46,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-09 10:35:46,126 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-09 10:35:46,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:46,126 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-09 10:35:46,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:46,126 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-09 10:35:46,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:46,127 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:46,127 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:46,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-09 10:35:46,336 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:46,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:46,337 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 27 times [2020-10-09 10:35:46,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:46,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642216877] [2020-10-09 10:35:46,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:46,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642216877] [2020-10-09 10:35:46,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294408377] [2020-10-09 10:35:46,400 INFO L93 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 [2020-10-09 10:35:46,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:35:46,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:46,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:46,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:46,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:46,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:46,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118812915] [2020-10-09 10:35:46,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:46,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:46,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:46,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:46,544 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-09 10:35:46,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:46,681 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-09 10:35:46,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:35:46,681 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:46,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:46,683 INFO L225 Difference]: With dead ends: 156 [2020-10-09 10:35:46,683 INFO L226 Difference]: Without dead ends: 154 [2020-10-09 10:35:46,683 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-09 10:35:46,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-09 10:35:46,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-10-09 10:35:46,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-09 10:35:46,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-10-09 10:35:46,687 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-10-09 10:35:46,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:46,687 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-10-09 10:35:46,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:46,687 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-10-09 10:35:46,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:46,688 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:46,688 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:46,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-09 10:35:46,900 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:46,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:46,900 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 28 times [2020-10-09 10:35:46,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:46,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561938806] [2020-10-09 10:35:46,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:46,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:46,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561938806] [2020-10-09 10:35:46,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101740314] [2020-10-09 10:35:46,975 INFO L93 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 [2020-10-09 10:35:47,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:47,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:47,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:47,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:47,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:47,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:47,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:47,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152844743] [2020-10-09 10:35:47,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:47,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:47,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:47,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:47,110 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-10-09 10:35:47,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:47,199 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-09 10:35:47,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:35:47,199 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:47,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:47,200 INFO L225 Difference]: With dead ends: 148 [2020-10-09 10:35:47,200 INFO L226 Difference]: Without dead ends: 146 [2020-10-09 10:35:47,201 INFO L673 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 [2020-10-09 10:35:47,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-09 10:35:47,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-10-09 10:35:47,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-09 10:35:47,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-09 10:35:47,204 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-09 10:35:47,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:47,205 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-09 10:35:47,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:47,205 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-09 10:35:47,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:47,206 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:47,206 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:47,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-09 10:35:47,415 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:47,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:47,415 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 29 times [2020-10-09 10:35:47,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:47,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452850257] [2020-10-09 10:35:47,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:47,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:47,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452850257] [2020-10-09 10:35:47,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137855105] [2020-10-09 10:35:47,478 INFO L93 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 [2020-10-09 10:35:47,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:47,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:47,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:47,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:47,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:47,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:47,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:47,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624623641] [2020-10-09 10:35:47,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:47,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:47,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:47,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:47,619 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-09 10:35:47,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:47,749 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-10-09 10:35:47,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:35:47,749 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:47,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:47,751 INFO L225 Difference]: With dead ends: 157 [2020-10-09 10:35:47,751 INFO L226 Difference]: Without dead ends: 155 [2020-10-09 10:35:47,751 INFO L673 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 [2020-10-09 10:35:47,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-09 10:35:47,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-10-09 10:35:47,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-09 10:35:47,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-10-09 10:35:47,754 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-10-09 10:35:47,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:47,755 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-10-09 10:35:47,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:47,755 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-10-09 10:35:47,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:47,755 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:47,756 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:47,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:47,956 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:47,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:47,957 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 30 times [2020-10-09 10:35:47,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:47,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598039235] [2020-10-09 10:35:47,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:47,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:48,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598039235] [2020-10-09 10:35:48,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506007094] [2020-10-09 10:35:48,019 INFO L93 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 [2020-10-09 10:35:48,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:35:48,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:48,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:48,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:48,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:48,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:48,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598139109] [2020-10-09 10:35:48,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:48,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:48,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:48,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:48,150 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 13 states. [2020-10-09 10:35:48,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:48,237 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-10-09 10:35:48,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:35:48,238 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:48,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:48,239 INFO L225 Difference]: With dead ends: 149 [2020-10-09 10:35:48,239 INFO L226 Difference]: Without dead ends: 147 [2020-10-09 10:35:48,240 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-09 10:35:48,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-09 10:35:48,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-10-09 10:35:48,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-09 10:35:48,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-09 10:35:48,244 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-09 10:35:48,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:48,244 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-09 10:35:48,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:48,244 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-09 10:35:48,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:48,245 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:48,245 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:48,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-09 10:35:48,456 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:48,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:48,456 INFO L82 PathProgramCache]: Analyzing trace with hash 2099754286, now seen corresponding path program 31 times [2020-10-09 10:35:48,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:48,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778984362] [2020-10-09 10:35:48,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:48,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778984362] [2020-10-09 10:35:48,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107325481] [2020-10-09 10:35:48,509 INFO L93 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 [2020-10-09 10:35:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:48,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:48,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:48,624 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:48,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:48,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:48,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851299382] [2020-10-09 10:35:48,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:48,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:48,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:48,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:48,658 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-09 10:35:48,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:48,883 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-10-09 10:35:48,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:35:48,884 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:48,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:48,886 INFO L225 Difference]: With dead ends: 164 [2020-10-09 10:35:48,886 INFO L226 Difference]: Without dead ends: 159 [2020-10-09 10:35:48,886 INFO L673 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 [2020-10-09 10:35:48,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-09 10:35:48,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-09 10:35:48,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-09 10:35:48,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-10-09 10:35:48,890 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-10-09 10:35:48,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:48,890 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-10-09 10:35:48,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:48,890 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-10-09 10:35:48,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:48,891 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:48,891 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:49,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-09 10:35:49,098 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:49,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:49,099 INFO L82 PathProgramCache]: Analyzing trace with hash 2099761757, now seen corresponding path program 32 times [2020-10-09 10:35:49,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:49,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362235975] [2020-10-09 10:35:49,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:49,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:49,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:49,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362235975] [2020-10-09 10:35:49,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196577985] [2020-10-09 10:35:49,154 INFO L93 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 [2020-10-09 10:35:49,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:49,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:49,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:49,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:49,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:49,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:49,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193042186] [2020-10-09 10:35:49,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:49,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:49,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:49,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:49,302 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-10-09 10:35:49,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:49,467 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-09 10:35:49,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:35:49,468 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:49,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:49,469 INFO L225 Difference]: With dead ends: 156 [2020-10-09 10:35:49,470 INFO L226 Difference]: Without dead ends: 154 [2020-10-09 10:35:49,470 INFO L673 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 [2020-10-09 10:35:49,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-09 10:35:49,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-10-09 10:35:49,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-09 10:35:49,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-09 10:35:49,474 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-09 10:35:49,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:49,474 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-09 10:35:49,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:49,475 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-09 10:35:49,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:49,475 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:49,475 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:49,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:49,679 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:49,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:49,679 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 33 times [2020-10-09 10:35:49,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:49,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990018255] [2020-10-09 10:35:49,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:49,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:49,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990018255] [2020-10-09 10:35:49,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816566431] [2020-10-09 10:35:49,731 INFO L93 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 [2020-10-09 10:35:49,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:35:49,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:49,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:49,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:49,882 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:35:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:49,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:49,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:49,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720906743] [2020-10-09 10:35:49,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:49,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:49,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:49,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:49,914 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-09 10:35:50,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:50,250 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-10-09 10:35:50,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:35:50,253 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:50,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:50,254 INFO L225 Difference]: With dead ends: 176 [2020-10-09 10:35:50,255 INFO L226 Difference]: Without dead ends: 171 [2020-10-09 10:35:50,255 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:35:50,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-09 10:35:50,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-10-09 10:35:50,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-09 10:35:50,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-09 10:35:50,258 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-09 10:35:50,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:50,259 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-09 10:35:50,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:50,259 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-09 10:35:50,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:50,259 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:50,260 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:50,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-10-09 10:35:50,470 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:50,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:50,470 INFO L82 PathProgramCache]: Analyzing trace with hash 2099784077, now seen corresponding path program 34 times [2020-10-09 10:35:50,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:50,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907536492] [2020-10-09 10:35:50,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:50,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:50,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907536492] [2020-10-09 10:35:50,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901017999] [2020-10-09 10:35:50,528 INFO L93 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 [2020-10-09 10:35:50,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:50,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:50,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:50,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:50,646 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:50,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:50,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:50,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947314754] [2020-10-09 10:35:50,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:50,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:50,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:50,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:50,673 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-09 10:35:50,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:50,905 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-10-09 10:35:50,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:35:50,906 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:50,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:50,907 INFO L225 Difference]: With dead ends: 166 [2020-10-09 10:35:50,907 INFO L226 Difference]: Without dead ends: 161 [2020-10-09 10:35:50,908 INFO L673 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 [2020-10-09 10:35:50,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-09 10:35:50,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-10-09 10:35:50,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-09 10:35:50,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-10-09 10:35:50,912 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-10-09 10:35:50,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:50,912 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-10-09 10:35:50,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:50,912 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-10-09 10:35:50,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:50,913 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:50,913 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:51,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:51,123 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:51,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:51,123 INFO L82 PathProgramCache]: Analyzing trace with hash 2099992397, now seen corresponding path program 35 times [2020-10-09 10:35:51,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:51,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769573343] [2020-10-09 10:35:51,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:51,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769573343] [2020-10-09 10:35:51,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247411062] [2020-10-09 10:35:51,180 INFO L93 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 [2020-10-09 10:35:51,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:51,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:51,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:51,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:51,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:51,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:51,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:51,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075600913] [2020-10-09 10:35:51,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:51,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:51,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:51,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:51,333 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-10-09 10:35:51,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:51,544 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-10-09 10:35:51,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:35:51,545 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:51,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:51,546 INFO L225 Difference]: With dead ends: 163 [2020-10-09 10:35:51,547 INFO L226 Difference]: Without dead ends: 161 [2020-10-09 10:35:51,547 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:35:51,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-09 10:35:51,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-10-09 10:35:51,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-09 10:35:51,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-10-09 10:35:51,552 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-10-09 10:35:51,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:51,553 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-10-09 10:35:51,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:51,553 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-10-09 10:35:51,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:51,554 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:51,554 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:51,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-09 10:35:51,765 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:51,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:51,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 36 times [2020-10-09 10:35:51,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:51,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428703208] [2020-10-09 10:35:51,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:51,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:51,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428703208] [2020-10-09 10:35:51,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7876629] [2020-10-09 10:35:51,833 INFO L93 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 [2020-10-09 10:35:51,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:35:51,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:51,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:51,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:51,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:51,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:51,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26275058] [2020-10-09 10:35:51,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:51,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:51,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:51,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:51,995 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-10-09 10:35:52,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:52,233 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-10-09 10:35:52,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:35:52,233 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:52,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:52,235 INFO L225 Difference]: With dead ends: 170 [2020-10-09 10:35:52,235 INFO L226 Difference]: Without dead ends: 168 [2020-10-09 10:35:52,235 INFO L673 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 [2020-10-09 10:35:52,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-09 10:35:52,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-10-09 10:35:52,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-09 10:35:52,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-10-09 10:35:52,238 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-10-09 10:35:52,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:52,238 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-10-09 10:35:52,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:52,239 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-10-09 10:35:52,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:52,239 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:52,239 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:52,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:52,440 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:52,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:52,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 37 times [2020-10-09 10:35:52,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:52,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968436643] [2020-10-09 10:35:52,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:52,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968436643] [2020-10-09 10:35:52,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667851885] [2020-10-09 10:35:52,490 INFO L93 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 [2020-10-09 10:35:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:52,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:52,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:52,594 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:35:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:52,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:52,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:52,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199901191] [2020-10-09 10:35:52,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:52,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:52,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:52,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:52,606 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-10-09 10:35:52,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:52,864 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-10-09 10:35:52,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:35:52,864 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:52,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:52,865 INFO L225 Difference]: With dead ends: 177 [2020-10-09 10:35:52,866 INFO L226 Difference]: Without dead ends: 172 [2020-10-09 10:35:52,866 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:35:52,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-09 10:35:52,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-10-09 10:35:52,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-09 10:35:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-10-09 10:35:52,869 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-10-09 10:35:52,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:52,870 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-10-09 10:35:52,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:52,870 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-10-09 10:35:52,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:52,870 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:52,870 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:53,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-09 10:35:53,071 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:53,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:53,072 INFO L82 PathProgramCache]: Analyzing trace with hash 2100677807, now seen corresponding path program 38 times [2020-10-09 10:35:53,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:53,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516941779] [2020-10-09 10:35:53,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:53,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:53,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:53,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516941779] [2020-10-09 10:35:53,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099776417] [2020-10-09 10:35:53,129 INFO L93 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 [2020-10-09 10:35:53,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:53,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:53,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:53,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:53,267 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:53,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:53,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:53,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:53,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176777847] [2020-10-09 10:35:53,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:53,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:53,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:53,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:53,279 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-10-09 10:35:53,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:53,625 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-10-09 10:35:53,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:35:53,625 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:53,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:53,627 INFO L225 Difference]: With dead ends: 190 [2020-10-09 10:35:53,627 INFO L226 Difference]: Without dead ends: 182 [2020-10-09 10:35:53,627 INFO L673 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 [2020-10-09 10:35:53,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-09 10:35:53,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-10-09 10:35:53,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-09 10:35:53,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-10-09 10:35:53,631 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-10-09 10:35:53,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:53,631 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-10-09 10:35:53,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:53,631 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-10-09 10:35:53,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:53,632 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:53,632 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:53,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-09 10:35:53,843 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:53,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:53,844 INFO L82 PathProgramCache]: Analyzing trace with hash 2100706637, now seen corresponding path program 39 times [2020-10-09 10:35:53,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:53,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555827094] [2020-10-09 10:35:53,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:53,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:53,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555827094] [2020-10-09 10:35:53,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445213305] [2020-10-09 10:35:53,896 INFO L93 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 [2020-10-09 10:35:53,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:35:53,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:53,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 10:35:53,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:53,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:53,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:53,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-10-09 10:35:53,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878384697] [2020-10-09 10:35:53,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-09 10:35:53,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:53,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-09 10:35:53,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-09 10:35:53,984 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 12 states. [2020-10-09 10:35:54,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:54,327 INFO L93 Difference]: Finished difference Result 177 states and 419 transitions. [2020-10-09 10:35:54,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:35:54,327 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-10-09 10:35:54,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:54,329 INFO L225 Difference]: With dead ends: 177 [2020-10-09 10:35:54,329 INFO L226 Difference]: Without dead ends: 172 [2020-10-09 10:35:54,329 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:35:54,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-09 10:35:54,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 120. [2020-10-09 10:35:54,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-09 10:35:54,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-10-09 10:35:54,334 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-10-09 10:35:54,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:54,334 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-10-09 10:35:54,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-09 10:35:54,334 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-10-09 10:35:54,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:54,335 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:54,335 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:54,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-09 10:35:54,544 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:54,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:54,544 INFO L82 PathProgramCache]: Analyzing trace with hash 2107142237, now seen corresponding path program 40 times [2020-10-09 10:35:54,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:54,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143810660] [2020-10-09 10:35:54,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:54,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143810660] [2020-10-09 10:35:54,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835382857] [2020-10-09 10:35:54,600 INFO L93 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 [2020-10-09 10:35:54,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:54,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:54,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:54,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:54,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:54,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:54,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585672676] [2020-10-09 10:35:54,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:54,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:54,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:54,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:54,739 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-10-09 10:35:54,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:54,876 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-10-09 10:35:54,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:35:54,877 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:54,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:54,878 INFO L225 Difference]: With dead ends: 164 [2020-10-09 10:35:54,878 INFO L226 Difference]: Without dead ends: 162 [2020-10-09 10:35:54,878 INFO L673 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 [2020-10-09 10:35:54,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-09 10:35:54,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-10-09 10:35:54,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-09 10:35:54,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-10-09 10:35:54,881 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-10-09 10:35:54,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:54,882 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-10-09 10:35:54,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:54,882 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-10-09 10:35:54,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:54,882 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:54,882 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:55,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-09 10:35:55,083 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:55,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:55,084 INFO L82 PathProgramCache]: Analyzing trace with hash 2107143198, now seen corresponding path program 41 times [2020-10-09 10:35:55,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:55,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591779228] [2020-10-09 10:35:55,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:55,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591779228] [2020-10-09 10:35:55,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989423157] [2020-10-09 10:35:55,143 INFO L93 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 [2020-10-09 10:35:55,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:55,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:55,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:55,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:55,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:55,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:55,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:55,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459785382] [2020-10-09 10:35:55,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:55,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:55,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:55,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:55,265 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-10-09 10:35:55,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:55,408 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-10-09 10:35:55,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:35:55,408 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:55,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:55,410 INFO L225 Difference]: With dead ends: 161 [2020-10-09 10:35:55,410 INFO L226 Difference]: Without dead ends: 159 [2020-10-09 10:35:55,410 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-09 10:35:55,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-09 10:35:55,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-10-09 10:35:55,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-09 10:35:55,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-10-09 10:35:55,413 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-10-09 10:35:55,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:55,414 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-10-09 10:35:55,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:55,414 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-10-09 10:35:55,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:55,414 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:55,414 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:55,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-09 10:35:55,625 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:55,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:55,625 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 42 times [2020-10-09 10:35:55,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:55,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778952977] [2020-10-09 10:35:55,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:55,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778952977] [2020-10-09 10:35:55,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508830883] [2020-10-09 10:35:55,680 INFO L93 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 [2020-10-09 10:35:55,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:35:55,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:55,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:55,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:55,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:55,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:55,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:55,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195196656] [2020-10-09 10:35:55,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:55,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:55,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:55,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:55,811 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-10-09 10:35:55,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:55,992 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-10-09 10:35:55,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:35:55,993 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:55,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:55,994 INFO L225 Difference]: With dead ends: 165 [2020-10-09 10:35:55,994 INFO L226 Difference]: Without dead ends: 163 [2020-10-09 10:35:55,995 INFO L673 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 [2020-10-09 10:35:55,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-09 10:35:55,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-10-09 10:35:55,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-09 10:35:55,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-10-09 10:35:55,998 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-10-09 10:35:55,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:55,998 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-10-09 10:35:55,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:55,998 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-10-09 10:35:55,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:55,999 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:55,999 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:56,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-10-09 10:35:56,207 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:56,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:56,208 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698988, now seen corresponding path program 43 times [2020-10-09 10:35:56,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:56,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105286177] [2020-10-09 10:35:56,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:56,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105286177] [2020-10-09 10:35:56,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392387955] [2020-10-09 10:35:56,268 INFO L93 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 [2020-10-09 10:35:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:56,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:56,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:56,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:56,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:56,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981367803] [2020-10-09 10:35:56,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:56,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:56,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:56,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:56,418 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-10-09 10:35:56,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:56,593 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-10-09 10:35:56,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:35:56,594 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:56,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:56,595 INFO L225 Difference]: With dead ends: 167 [2020-10-09 10:35:56,595 INFO L226 Difference]: Without dead ends: 165 [2020-10-09 10:35:56,595 INFO L673 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 [2020-10-09 10:35:56,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-09 10:35:56,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-10-09 10:35:56,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-09 10:35:56,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-09 10:35:56,599 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-09 10:35:56,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:56,599 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-09 10:35:56,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:56,599 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-09 10:35:56,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:56,600 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:56,600 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:56,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:56,809 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:56,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:56,809 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 44 times [2020-10-09 10:35:56,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:56,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752457506] [2020-10-09 10:35:56,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:56,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:56,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752457506] [2020-10-09 10:35:56,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755104458] [2020-10-09 10:35:56,862 INFO L93 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 [2020-10-09 10:35:56,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:56,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:56,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:56,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:56,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:56,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:56,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:56,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353638459] [2020-10-09 10:35:56,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:56,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:56,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:56,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:56,988 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-09 10:35:57,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:57,229 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-10-09 10:35:57,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:35:57,230 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:57,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:57,231 INFO L225 Difference]: With dead ends: 168 [2020-10-09 10:35:57,232 INFO L226 Difference]: Without dead ends: 166 [2020-10-09 10:35:57,232 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:35:57,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-09 10:35:57,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-10-09 10:35:57,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-09 10:35:57,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-09 10:35:57,235 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-09 10:35:57,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:57,235 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-09 10:35:57,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:57,235 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-09 10:35:57,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:57,236 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:57,236 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:57,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:57,437 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:57,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:57,437 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 45 times [2020-10-09 10:35:57,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:57,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317461520] [2020-10-09 10:35:57,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:57,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:57,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317461520] [2020-10-09 10:35:57,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387240591] [2020-10-09 10:35:57,495 INFO L93 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 [2020-10-09 10:35:57,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:35:57,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:57,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:57,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:57,601 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:35:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:57,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:57,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:57,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279772223] [2020-10-09 10:35:57,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:57,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:57,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:57,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:57,610 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-09 10:35:57,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:57,794 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-10-09 10:35:57,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:35:57,795 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:57,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:57,796 INFO L225 Difference]: With dead ends: 160 [2020-10-09 10:35:57,796 INFO L226 Difference]: Without dead ends: 155 [2020-10-09 10:35:57,797 INFO L673 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 [2020-10-09 10:35:57,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-09 10:35:57,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-09 10:35:57,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-09 10:35:57,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-09 10:35:57,800 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-09 10:35:57,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:57,800 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-09 10:35:57,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:57,800 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-09 10:35:57,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:57,801 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:57,801 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:58,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:58,010 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:58,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:58,011 INFO L82 PathProgramCache]: Analyzing trace with hash 2128383437, now seen corresponding path program 46 times [2020-10-09 10:35:58,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:58,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563587652] [2020-10-09 10:35:58,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:58,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:58,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:58,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563587652] [2020-10-09 10:35:58,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470845369] [2020-10-09 10:35:58,063 INFO L93 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 [2020-10-09 10:35:58,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:58,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:58,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:58,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:58,172 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:58,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:58,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:58,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:58,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946279182] [2020-10-09 10:35:58,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:58,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:58,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:58,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:58,204 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-09 10:35:58,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:58,523 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-10-09 10:35:58,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:35:58,524 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:58,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:58,525 INFO L225 Difference]: With dead ends: 189 [2020-10-09 10:35:58,526 INFO L226 Difference]: Without dead ends: 181 [2020-10-09 10:35:58,526 INFO L673 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 [2020-10-09 10:35:58,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-09 10:35:58,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-10-09 10:35:58,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-09 10:35:58,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-09 10:35:58,529 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-09 10:35:58,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:58,529 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-09 10:35:58,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:58,529 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-09 10:35:58,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:58,530 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:58,530 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:58,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:58,731 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:58,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:58,731 INFO L82 PathProgramCache]: Analyzing trace with hash 2128390908, now seen corresponding path program 47 times [2020-10-09 10:35:58,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:58,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732955487] [2020-10-09 10:35:58,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:58,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:58,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732955487] [2020-10-09 10:35:58,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976279943] [2020-10-09 10:35:58,785 INFO L93 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 [2020-10-09 10:35:58,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:58,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:58,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:58,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:58,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:58,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:58,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497443061] [2020-10-09 10:35:58,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:58,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:58,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:58,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:58,900 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-09 10:35:59,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:59,131 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-10-09 10:35:59,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:35:59,132 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:59,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:59,133 INFO L225 Difference]: With dead ends: 169 [2020-10-09 10:35:59,133 INFO L226 Difference]: Without dead ends: 167 [2020-10-09 10:35:59,134 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:35:59,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-09 10:35:59,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-10-09 10:35:59,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-09 10:35:59,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-09 10:35:59,138 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-09 10:35:59,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:59,138 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-09 10:35:59,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:59,138 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-09 10:35:59,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:59,139 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:59,139 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:59,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-09 10:35:59,348 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:59,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:59,348 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 48 times [2020-10-09 10:35:59,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:59,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648601832] [2020-10-09 10:35:59,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:59,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648601832] [2020-10-09 10:35:59,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709464384] [2020-10-09 10:35:59,402 INFO L93 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 [2020-10-09 10:35:59,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:35:59,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:59,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:59,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:59,523 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:35:59,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:59,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:59,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:59,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898879397] [2020-10-09 10:35:59,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:59,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:59,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:59,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:59,532 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-09 10:35:59,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:59,849 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-10-09 10:35:59,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:35:59,849 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:59,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:59,851 INFO L225 Difference]: With dead ends: 192 [2020-10-09 10:35:59,851 INFO L226 Difference]: Without dead ends: 184 [2020-10-09 10:35:59,851 INFO L673 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 [2020-10-09 10:35:59,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-09 10:35:59,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-10-09 10:35:59,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-09 10:35:59,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-10-09 10:35:59,857 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-10-09 10:35:59,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:59,857 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-10-09 10:35:59,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:59,858 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-10-09 10:35:59,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:59,858 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:59,858 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:00,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:00,066 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:00,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:00,066 INFO L82 PathProgramCache]: Analyzing trace with hash 2128413228, now seen corresponding path program 49 times [2020-10-09 10:36:00,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:00,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236469680] [2020-10-09 10:36:00,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:00,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:00,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236469680] [2020-10-09 10:36:00,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106785028] [2020-10-09 10:36:00,118 INFO L93 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 [2020-10-09 10:36:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:00,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:36:00,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:00,229 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:36:00,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:00,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:00,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:36:00,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454457548] [2020-10-09 10:36:00,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:36:00,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:00,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:36:00,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:36:00,239 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-10-09 10:36:00,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:00,545 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-10-09 10:36:00,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:36:00,546 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:36:00,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:00,547 INFO L225 Difference]: With dead ends: 180 [2020-10-09 10:36:00,547 INFO L226 Difference]: Without dead ends: 175 [2020-10-09 10:36:00,547 INFO L673 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 [2020-10-09 10:36:00,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-09 10:36:00,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-10-09 10:36:00,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-09 10:36:00,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-09 10:36:00,551 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-09 10:36:00,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:00,551 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-09 10:36:00,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:36:00,551 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-09 10:36:00,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:00,552 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:00,552 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:00,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-09 10:36:00,761 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:00,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:00,762 INFO L82 PathProgramCache]: Analyzing trace with hash 609848181, now seen corresponding path program 5 times [2020-10-09 10:36:00,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:00,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205618931] [2020-10-09 10:36:00,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:00,833 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:00,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205618931] [2020-10-09 10:36:00,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165965738] [2020-10-09 10:36:00,834 INFO L93 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 [2020-10-09 10:36:00,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:36:00,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:00,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:00,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:00,965 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:36:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:00,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:00,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-09 10:36:00,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804452620] [2020-10-09 10:36:00,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 10:36:00,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:00,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 10:36:00,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-09 10:36:00,989 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-09 10:36:01,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:01,126 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-09 10:36:01,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:01,127 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-09 10:36:01,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:01,128 INFO L225 Difference]: With dead ends: 164 [2020-10-09 10:36:01,128 INFO L226 Difference]: Without dead ends: 159 [2020-10-09 10:36:01,128 INFO L673 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 [2020-10-09 10:36:01,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-09 10:36:01,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-09 10:36:01,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-09 10:36:01,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-09 10:36:01,131 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-09 10:36:01,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:01,131 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-09 10:36:01,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 10:36:01,132 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-09 10:36:01,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:01,132 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:01,132 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:01,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:01,333 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:01,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:01,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 15 times [2020-10-09 10:36:01,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:01,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060649470] [2020-10-09 10:36:01,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:01,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060649470] [2020-10-09 10:36:01,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106100976] [2020-10-09 10:36:01,437 INFO L93 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 [2020-10-09 10:36:01,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:36:01,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:01,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:01,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:01,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:01,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:01,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864856424] [2020-10-09 10:36:01,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:01,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:01,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:01,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:01,614 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-09 10:36:01,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:01,658 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-09 10:36:01,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:36:01,659 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-09 10:36:01,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:01,660 INFO L225 Difference]: With dead ends: 156 [2020-10-09 10:36:01,660 INFO L226 Difference]: Without dead ends: 153 [2020-10-09 10:36:01,661 INFO L673 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 [2020-10-09 10:36:01,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-09 10:36:01,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-10-09 10:36:01,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-09 10:36:01,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-09 10:36:01,663 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-09 10:36:01,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:01,664 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-09 10:36:01,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:01,664 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-09 10:36:01,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:01,664 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:01,664 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:01,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-09 10:36:01,865 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:01,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:01,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1985246760, now seen corresponding path program 16 times [2020-10-09 10:36:01,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:01,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877153750] [2020-10-09 10:36:01,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:01,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877153750] [2020-10-09 10:36:01,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807191154] [2020-10-09 10:36:01,963 INFO L93 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 [2020-10-09 10:36:01,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:36:01,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:01,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:01,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:02,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:02,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:02,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055966184] [2020-10-09 10:36:02,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:02,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:02,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:02,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:02,120 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-09 10:36:02,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:02,179 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-10-09 10:36:02,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:36:02,180 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-09 10:36:02,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:02,181 INFO L225 Difference]: With dead ends: 170 [2020-10-09 10:36:02,181 INFO L226 Difference]: Without dead ends: 167 [2020-10-09 10:36:02,181 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-09 10:36:02,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-09 10:36:02,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-10-09 10:36:02,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-09 10:36:02,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-09 10:36:02,184 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-09 10:36:02,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:02,186 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-09 10:36:02,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:02,186 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-09 10:36:02,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:02,187 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:02,187 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:02,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:02,387 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:02,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:02,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1644785416, now seen corresponding path program 17 times [2020-10-09 10:36:02,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:02,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11633485] [2020-10-09 10:36:02,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:02,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11633485] [2020-10-09 10:36:02,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196073216] [2020-10-09 10:36:02,474 INFO L93 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 [2020-10-09 10:36:02,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:36:02,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:02,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:02,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:02,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:02,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:02,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:02,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238268188] [2020-10-09 10:36:02,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:02,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:02,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:02,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:02,633 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-09 10:36:02,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:02,713 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-10-09 10:36:02,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:36:02,714 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-09 10:36:02,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:02,715 INFO L225 Difference]: With dead ends: 169 [2020-10-09 10:36:02,715 INFO L226 Difference]: Without dead ends: 166 [2020-10-09 10:36:02,715 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:36:02,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-09 10:36:02,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-10-09 10:36:02,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-09 10:36:02,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-10-09 10:36:02,718 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-10-09 10:36:02,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:02,718 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-10-09 10:36:02,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:02,718 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-10-09 10:36:02,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:02,719 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:02,719 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:02,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:02,920 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:02,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:02,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1623335896, now seen corresponding path program 18 times [2020-10-09 10:36:02,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:02,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036365461] [2020-10-09 10:36:02,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:02,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:02,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036365461] [2020-10-09 10:36:02,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400813073] [2020-10-09 10:36:02,997 INFO L93 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 [2020-10-09 10:36:03,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:36:03,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:03,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:03,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:03,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:03,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:03,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776793262] [2020-10-09 10:36:03,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:03,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:03,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:03,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:03,162 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-10-09 10:36:03,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:03,258 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-10-09 10:36:03,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:36:03,259 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-09 10:36:03,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:03,260 INFO L225 Difference]: With dead ends: 168 [2020-10-09 10:36:03,260 INFO L226 Difference]: Without dead ends: 165 [2020-10-09 10:36:03,261 INFO L673 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 [2020-10-09 10:36:03,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-09 10:36:03,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-10-09 10:36:03,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-09 10:36:03,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-10-09 10:36:03,264 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-10-09 10:36:03,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:03,264 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-10-09 10:36:03,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:03,264 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-10-09 10:36:03,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:03,265 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:03,265 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:03,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-10-09 10:36:03,474 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:03,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:03,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1622643976, now seen corresponding path program 19 times [2020-10-09 10:36:03,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:03,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498049198] [2020-10-09 10:36:03,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:03,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:03,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498049198] [2020-10-09 10:36:03,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536450836] [2020-10-09 10:36:03,548 INFO L93 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 [2020-10-09 10:36:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:03,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:03,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:03,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:03,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:03,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576832177] [2020-10-09 10:36:03,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:03,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:03,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:03,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:03,702 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-10-09 10:36:03,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:03,829 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-10-09 10:36:03,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:36:03,830 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-09 10:36:03,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:03,831 INFO L225 Difference]: With dead ends: 167 [2020-10-09 10:36:03,831 INFO L226 Difference]: Without dead ends: 164 [2020-10-09 10:36:03,831 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:36:03,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-09 10:36:03,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-10-09 10:36:03,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-09 10:36:03,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-10-09 10:36:03,834 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-10-09 10:36:03,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:03,835 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-10-09 10:36:03,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:03,835 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-10-09 10:36:03,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:03,835 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:03,835 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:04,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:04,045 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:04,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:04,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1622621656, now seen corresponding path program 20 times [2020-10-09 10:36:04,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:04,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546716328] [2020-10-09 10:36:04,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:04,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546716328] [2020-10-09 10:36:04,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592453496] [2020-10-09 10:36:04,118 INFO L93 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 [2020-10-09 10:36:04,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:04,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:04,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:04,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:04,260 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:36:04,272 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:04,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:04,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:04,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773103659] [2020-10-09 10:36:04,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:04,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:04,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:04,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:04,273 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-10-09 10:36:04,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:04,454 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-10-09 10:36:04,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:04,455 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-09 10:36:04,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:04,457 INFO L225 Difference]: With dead ends: 176 [2020-10-09 10:36:04,457 INFO L226 Difference]: Without dead ends: 170 [2020-10-09 10:36:04,457 INFO L673 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 [2020-10-09 10:36:04,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-09 10:36:04,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-10-09 10:36:04,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-09 10:36:04,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-09 10:36:04,460 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-09 10:36:04,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:04,460 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-09 10:36:04,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:04,460 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-09 10:36:04,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:04,461 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:04,461 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:04,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:04,671 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:04,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:04,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1730118241, now seen corresponding path program 50 times [2020-10-09 10:36:04,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:04,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286591538] [2020-10-09 10:36:04,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:04,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286591538] [2020-10-09 10:36:04,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576685109] [2020-10-09 10:36:04,742 INFO L93 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 [2020-10-09 10:36:04,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:04,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:04,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:04,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:04,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:04,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:04,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:04,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500539871] [2020-10-09 10:36:04,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:04,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:04,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:04,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:04,897 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-09 10:36:04,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:04,946 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-10-09 10:36:04,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:36:04,947 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:04,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:04,948 INFO L225 Difference]: With dead ends: 163 [2020-10-09 10:36:04,948 INFO L226 Difference]: Without dead ends: 161 [2020-10-09 10:36:04,948 INFO L673 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 [2020-10-09 10:36:04,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-09 10:36:04,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-10-09 10:36:04,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-09 10:36:04,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-10-09 10:36:04,952 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-10-09 10:36:04,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:04,952 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-10-09 10:36:04,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:04,953 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-10-09 10:36:04,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:04,954 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:04,954 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:05,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-10-09 10:36:05,155 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:05,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:05,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 51 times [2020-10-09 10:36:05,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:05,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535393511] [2020-10-09 10:36:05,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:05,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:05,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535393511] [2020-10-09 10:36:05,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902972259] [2020-10-09 10:36:05,260 INFO L93 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 [2020-10-09 10:36:05,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:36:05,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:05,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:05,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:05,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:05,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:05,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583490584] [2020-10-09 10:36:05,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:05,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:05,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:05,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:05,484 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-10-09 10:36:05,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:05,673 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-10-09 10:36:05,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:36:05,674 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:05,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:05,676 INFO L225 Difference]: With dead ends: 172 [2020-10-09 10:36:05,676 INFO L226 Difference]: Without dead ends: 170 [2020-10-09 10:36:05,676 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:36:05,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-09 10:36:05,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-09 10:36:05,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-09 10:36:05,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-09 10:36:05,681 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-09 10:36:05,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:05,682 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-09 10:36:05,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:05,682 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-09 10:36:05,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:05,683 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:05,683 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:05,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:05,896 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:05,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:05,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 52 times [2020-10-09 10:36:05,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:05,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523384576] [2020-10-09 10:36:05,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:05,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523384576] [2020-10-09 10:36:05,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942968495] [2020-10-09 10:36:05,974 INFO L93 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 [2020-10-09 10:36:06,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:36:06,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:06,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:06,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:06,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:06,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:06,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033892462] [2020-10-09 10:36:06,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:06,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:06,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:06,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:06,208 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-09 10:36:06,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:06,391 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-09 10:36:06,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:36:06,392 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:06,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:06,393 INFO L225 Difference]: With dead ends: 179 [2020-10-09 10:36:06,393 INFO L226 Difference]: Without dead ends: 177 [2020-10-09 10:36:06,394 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-10-09 10:36:06,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-09 10:36:06,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-10-09 10:36:06,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-09 10:36:06,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-10-09 10:36:06,397 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-10-09 10:36:06,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:06,397 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-10-09 10:36:06,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:06,397 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-10-09 10:36:06,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:06,397 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:06,397 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:06,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-09 10:36:06,598 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:06,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:06,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 53 times [2020-10-09 10:36:06,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:06,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713440367] [2020-10-09 10:36:06,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:06,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:06,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:06,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713440367] [2020-10-09 10:36:06,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588026835] [2020-10-09 10:36:06,674 INFO L93 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 [2020-10-09 10:36:06,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:06,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:06,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:06,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:06,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:06,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:06,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636023188] [2020-10-09 10:36:06,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:06,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:06,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:06,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:06,819 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-10-09 10:36:06,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:06,991 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-09 10:36:06,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:36:06,992 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:06,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:06,993 INFO L225 Difference]: With dead ends: 179 [2020-10-09 10:36:06,994 INFO L226 Difference]: Without dead ends: 177 [2020-10-09 10:36:06,994 INFO L673 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 [2020-10-09 10:36:06,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-09 10:36:06,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-10-09 10:36:06,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-09 10:36:06,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-09 10:36:06,996 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-09 10:36:06,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:06,997 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-09 10:36:06,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:06,997 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-09 10:36:06,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:06,997 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:06,997 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:07,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-09 10:36:07,198 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:07,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:07,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 54 times [2020-10-09 10:36:07,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:07,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214571506] [2020-10-09 10:36:07,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:07,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:07,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214571506] [2020-10-09 10:36:07,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998316308] [2020-10-09 10:36:07,273 INFO L93 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 [2020-10-09 10:36:07,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:36:07,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:07,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:07,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:07,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:07,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:07,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477423738] [2020-10-09 10:36:07,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:07,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:07,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:07,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:07,406 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-09 10:36:07,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:07,599 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-10-09 10:36:07,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:36:07,600 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:07,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:07,602 INFO L225 Difference]: With dead ends: 184 [2020-10-09 10:36:07,602 INFO L226 Difference]: Without dead ends: 182 [2020-10-09 10:36:07,602 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:36:07,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-09 10:36:07,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-10-09 10:36:07,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-09 10:36:07,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-10-09 10:36:07,605 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-10-09 10:36:07,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:07,605 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-10-09 10:36:07,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:07,605 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-10-09 10:36:07,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:07,606 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:07,606 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:07,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-09 10:36:07,807 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:07,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:07,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 55 times [2020-10-09 10:36:07,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:07,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957699716] [2020-10-09 10:36:07,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:07,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957699716] [2020-10-09 10:36:07,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40668929] [2020-10-09 10:36:07,883 INFO L93 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 [2020-10-09 10:36:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:07,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:07,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:08,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:08,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:08,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664944773] [2020-10-09 10:36:08,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:08,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:08,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:08,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:08,035 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-10-09 10:36:08,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:08,232 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-10-09 10:36:08,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:36:08,233 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:08,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:08,234 INFO L225 Difference]: With dead ends: 179 [2020-10-09 10:36:08,234 INFO L226 Difference]: Without dead ends: 177 [2020-10-09 10:36:08,235 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:36:08,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-09 10:36:08,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-10-09 10:36:08,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-09 10:36:08,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-09 10:36:08,239 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-09 10:36:08,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:08,239 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-09 10:36:08,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:08,239 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-09 10:36:08,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:08,240 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:08,240 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:08,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:08,450 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:08,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:08,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 56 times [2020-10-09 10:36:08,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:08,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327866334] [2020-10-09 10:36:08,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:08,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327866334] [2020-10-09 10:36:08,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050186738] [2020-10-09 10:36:08,534 INFO L93 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 [2020-10-09 10:36:08,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:08,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:08,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:08,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:08,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:08,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:08,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:08,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40865646] [2020-10-09 10:36:08,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:08,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:08,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:08,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:08,713 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-10-09 10:36:08,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:08,858 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-10-09 10:36:08,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:36:08,858 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:08,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:08,860 INFO L225 Difference]: With dead ends: 176 [2020-10-09 10:36:08,860 INFO L226 Difference]: Without dead ends: 174 [2020-10-09 10:36:08,860 INFO L673 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 [2020-10-09 10:36:08,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-09 10:36:08,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-10-09 10:36:08,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-09 10:36:08,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-10-09 10:36:08,863 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-10-09 10:36:08,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:08,864 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-10-09 10:36:08,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:08,864 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-10-09 10:36:08,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:08,864 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:08,864 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:09,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:09,073 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:09,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:09,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 57 times [2020-10-09 10:36:09,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:09,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625541843] [2020-10-09 10:36:09,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:09,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:09,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625541843] [2020-10-09 10:36:09,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373511846] [2020-10-09 10:36:09,152 INFO L93 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 [2020-10-09 10:36:09,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:36:09,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:09,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:09,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:09,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:09,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:09,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185681283] [2020-10-09 10:36:09,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:09,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:09,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:09,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:09,317 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-10-09 10:36:09,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:09,544 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-09 10:36:09,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:36:09,545 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:09,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:09,546 INFO L225 Difference]: With dead ends: 185 [2020-10-09 10:36:09,547 INFO L226 Difference]: Without dead ends: 183 [2020-10-09 10:36:09,547 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:36:09,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-09 10:36:09,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-10-09 10:36:09,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-09 10:36:09,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-10-09 10:36:09,552 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-10-09 10:36:09,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:09,552 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-10-09 10:36:09,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:09,552 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-10-09 10:36:09,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:09,553 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:09,553 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:09,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:09,754 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:09,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:09,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 58 times [2020-10-09 10:36:09,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:09,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545550696] [2020-10-09 10:36:09,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:09,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545550696] [2020-10-09 10:36:09,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575431089] [2020-10-09 10:36:09,864 INFO L93 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 [2020-10-09 10:36:09,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:36:09,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:09,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:09,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:10,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:10,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:10,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:10,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620617188] [2020-10-09 10:36:10,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:10,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:10,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:10,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:10,046 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-10-09 10:36:10,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:10,214 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-09 10:36:10,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:36:10,215 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:10,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:10,216 INFO L225 Difference]: With dead ends: 185 [2020-10-09 10:36:10,216 INFO L226 Difference]: Without dead ends: 183 [2020-10-09 10:36:10,217 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:36:10,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-09 10:36:10,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-10-09 10:36:10,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-09 10:36:10,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-10-09 10:36:10,220 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-10-09 10:36:10,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:10,220 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-10-09 10:36:10,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:10,220 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-10-09 10:36:10,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:10,221 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:10,221 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:10,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:10,431 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:10,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:10,431 INFO L82 PathProgramCache]: Analyzing trace with hash 9395951, now seen corresponding path program 59 times [2020-10-09 10:36:10,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:10,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919723869] [2020-10-09 10:36:10,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:10,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919723869] [2020-10-09 10:36:10,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344148671] [2020-10-09 10:36:10,542 INFO L93 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 [2020-10-09 10:36:10,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:36:10,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:10,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:10,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:10,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:10,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:10,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896479623] [2020-10-09 10:36:10,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:10,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:10,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:10,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:10,691 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-10-09 10:36:10,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:10,753 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-10-09 10:36:10,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:36:10,753 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:10,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:10,754 INFO L225 Difference]: With dead ends: 182 [2020-10-09 10:36:10,755 INFO L226 Difference]: Without dead ends: 180 [2020-10-09 10:36:10,755 INFO L673 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 [2020-10-09 10:36:10,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-09 10:36:10,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-10-09 10:36:10,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-09 10:36:10,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-10-09 10:36:10,760 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-10-09 10:36:10,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:10,760 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-10-09 10:36:10,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:10,761 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-10-09 10:36:10,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:10,761 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:10,761 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:10,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-10-09 10:36:10,971 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:10,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:10,971 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 60 times [2020-10-09 10:36:10,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:10,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661437676] [2020-10-09 10:36:10,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:11,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661437676] [2020-10-09 10:36:11,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296544271] [2020-10-09 10:36:11,077 INFO L93 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 [2020-10-09 10:36:11,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:36:11,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:11,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:11,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:11,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:11,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:11,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202786512] [2020-10-09 10:36:11,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:11,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:11,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:11,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:11,245 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-10-09 10:36:11,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:11,408 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-10-09 10:36:11,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 10:36:11,409 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:11,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:11,410 INFO L225 Difference]: With dead ends: 185 [2020-10-09 10:36:11,410 INFO L226 Difference]: Without dead ends: 183 [2020-10-09 10:36:11,411 INFO L673 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 [2020-10-09 10:36:11,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-09 10:36:11,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-10-09 10:36:11,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:36:11,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-09 10:36:11,414 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-09 10:36:11,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:11,414 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-09 10:36:11,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:11,414 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-09 10:36:11,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:11,415 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:11,415 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:11,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:11,616 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:11,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:11,616 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 61 times [2020-10-09 10:36:11,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:11,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975636249] [2020-10-09 10:36:11,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:11,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:11,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975636249] [2020-10-09 10:36:11,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931925410] [2020-10-09 10:36:11,706 INFO L93 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 [2020-10-09 10:36:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:11,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:11,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:11,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:11,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:11,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551377317] [2020-10-09 10:36:11,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:11,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:11,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:11,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:11,882 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-09 10:36:12,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:12,091 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-10-09 10:36:12,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 10:36:12,092 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:12,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:12,093 INFO L225 Difference]: With dead ends: 191 [2020-10-09 10:36:12,093 INFO L226 Difference]: Without dead ends: 189 [2020-10-09 10:36:12,094 INFO L673 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 [2020-10-09 10:36:12,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-09 10:36:12,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-10-09 10:36:12,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-09 10:36:12,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-10-09 10:36:12,097 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-10-09 10:36:12,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:12,097 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-10-09 10:36:12,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:12,097 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-10-09 10:36:12,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:12,097 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:12,097 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:12,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:12,298 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:12,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:12,299 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 62 times [2020-10-09 10:36:12,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:12,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277346460] [2020-10-09 10:36:12,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:12,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:12,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277346460] [2020-10-09 10:36:12,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415171556] [2020-10-09 10:36:12,375 INFO L93 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 [2020-10-09 10:36:12,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:12,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:12,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:12,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:12,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:12,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:12,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:12,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524143565] [2020-10-09 10:36:12,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:12,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:12,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:12,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:12,535 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-10-09 10:36:12,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:12,765 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-10-09 10:36:12,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:12,766 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:12,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:12,768 INFO L225 Difference]: With dead ends: 187 [2020-10-09 10:36:12,768 INFO L226 Difference]: Without dead ends: 185 [2020-10-09 10:36:12,768 INFO L673 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 [2020-10-09 10:36:12,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-09 10:36:12,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-10-09 10:36:12,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:36:12,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-09 10:36:12,772 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-09 10:36:12,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:12,772 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-09 10:36:12,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:12,772 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-09 10:36:12,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:12,773 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:12,773 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:12,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-10-09 10:36:12,979 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:12,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:12,979 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 63 times [2020-10-09 10:36:12,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:12,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414161263] [2020-10-09 10:36:12,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:12,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:13,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:13,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414161263] [2020-10-09 10:36:13,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847706634] [2020-10-09 10:36:13,059 INFO L93 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 [2020-10-09 10:36:13,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:36:13,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:13,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:13,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:13,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:13,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:13,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:13,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985331808] [2020-10-09 10:36:13,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:13,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:13,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:13,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:13,200 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-09 10:36:13,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:13,430 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-10-09 10:36:13,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:36:13,431 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:13,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:13,432 INFO L225 Difference]: With dead ends: 198 [2020-10-09 10:36:13,432 INFO L226 Difference]: Without dead ends: 196 [2020-10-09 10:36:13,433 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:36:13,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-09 10:36:13,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-10-09 10:36:13,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:36:13,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-10-09 10:36:13,436 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-10-09 10:36:13,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:13,436 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-10-09 10:36:13,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:13,437 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-10-09 10:36:13,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:13,437 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:13,437 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:13,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:13,646 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:13,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:13,646 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 64 times [2020-10-09 10:36:13,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:13,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304775959] [2020-10-09 10:36:13,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:13,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304775959] [2020-10-09 10:36:13,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528558775] [2020-10-09 10:36:13,724 INFO L93 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 [2020-10-09 10:36:13,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:36:13,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:13,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:13,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:13,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:13,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:13,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296979337] [2020-10-09 10:36:13,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:13,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:13,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:13,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:13,878 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-10-09 10:36:14,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:14,131 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-10-09 10:36:14,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:36:14,132 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:14,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:14,133 INFO L225 Difference]: With dead ends: 189 [2020-10-09 10:36:14,133 INFO L226 Difference]: Without dead ends: 187 [2020-10-09 10:36:14,134 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:36:14,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-09 10:36:14,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-10-09 10:36:14,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-09 10:36:14,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-10-09 10:36:14,137 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-10-09 10:36:14,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:14,137 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-10-09 10:36:14,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:14,137 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-10-09 10:36:14,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:14,138 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:14,138 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:14,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-09 10:36:14,339 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:14,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:14,339 INFO L82 PathProgramCache]: Analyzing trace with hash 646625441, now seen corresponding path program 65 times [2020-10-09 10:36:14,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:14,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830850807] [2020-10-09 10:36:14,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:14,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:14,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830850807] [2020-10-09 10:36:14,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469642363] [2020-10-09 10:36:14,443 INFO L93 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 [2020-10-09 10:36:14,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:36:14,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:14,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:14,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:14,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:14,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:14,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:14,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575516151] [2020-10-09 10:36:14,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:14,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:14,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:14,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:14,591 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-10-09 10:36:14,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:14,678 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-10-09 10:36:14,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:36:14,679 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:14,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:14,680 INFO L225 Difference]: With dead ends: 178 [2020-10-09 10:36:14,680 INFO L226 Difference]: Without dead ends: 176 [2020-10-09 10:36:14,681 INFO L673 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 [2020-10-09 10:36:14,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-09 10:36:14,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-10-09 10:36:14,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-09 10:36:14,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-10-09 10:36:14,684 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-10-09 10:36:14,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:14,684 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-10-09 10:36:14,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:14,684 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-10-09 10:36:14,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:14,685 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:14,685 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:14,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:14,889 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:14,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:14,889 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 66 times [2020-10-09 10:36:14,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:14,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095692930] [2020-10-09 10:36:14,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:14,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:14,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:14,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095692930] [2020-10-09 10:36:14,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47763169] [2020-10-09 10:36:14,979 INFO L93 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 [2020-10-09 10:36:15,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:36:15,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:15,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:15,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:15,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:15,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:15,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:15,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831790811] [2020-10-09 10:36:15,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:15,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:15,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:15,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:15,132 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-10-09 10:36:15,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:15,320 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-10-09 10:36:15,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:15,321 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:15,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:15,322 INFO L225 Difference]: With dead ends: 193 [2020-10-09 10:36:15,322 INFO L226 Difference]: Without dead ends: 191 [2020-10-09 10:36:15,323 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:36:15,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-09 10:36:15,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-10-09 10:36:15,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-09 10:36:15,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-10-09 10:36:15,326 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-10-09 10:36:15,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:15,327 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-10-09 10:36:15,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:15,327 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-10-09 10:36:15,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:15,327 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:15,328 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:15,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-10-09 10:36:15,538 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:15,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:15,538 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 67 times [2020-10-09 10:36:15,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:15,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922905504] [2020-10-09 10:36:15,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:15,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922905504] [2020-10-09 10:36:15,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887112710] [2020-10-09 10:36:15,614 INFO L93 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 [2020-10-09 10:36:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:15,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:15,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:15,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:15,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:15,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960086929] [2020-10-09 10:36:15,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:15,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:15,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:15,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:15,790 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-10-09 10:36:16,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:16,025 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-09 10:36:16,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:16,025 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:16,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:16,027 INFO L225 Difference]: With dead ends: 195 [2020-10-09 10:36:16,027 INFO L226 Difference]: Without dead ends: 193 [2020-10-09 10:36:16,027 INFO L673 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 [2020-10-09 10:36:16,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-09 10:36:16,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-10-09 10:36:16,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-09 10:36:16,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-10-09 10:36:16,030 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-10-09 10:36:16,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:16,030 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-10-09 10:36:16,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:16,030 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-10-09 10:36:16,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:16,031 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:16,031 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:16,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:16,231 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:16,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:16,232 INFO L82 PathProgramCache]: Analyzing trace with hash 667181231, now seen corresponding path program 68 times [2020-10-09 10:36:16,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:16,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215933492] [2020-10-09 10:36:16,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:16,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215933492] [2020-10-09 10:36:16,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570662411] [2020-10-09 10:36:16,325 INFO L93 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 [2020-10-09 10:36:16,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:16,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:16,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:16,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:16,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:16,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:16,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:16,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959898123] [2020-10-09 10:36:16,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:16,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:16,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:16,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:16,486 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-10-09 10:36:16,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:16,594 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-10-09 10:36:16,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:36:16,594 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:16,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:16,596 INFO L225 Difference]: With dead ends: 174 [2020-10-09 10:36:16,596 INFO L226 Difference]: Without dead ends: 172 [2020-10-09 10:36:16,596 INFO L673 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 [2020-10-09 10:36:16,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-09 10:36:16,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-10-09 10:36:16,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:36:16,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-10-09 10:36:16,599 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-10-09 10:36:16,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:16,599 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-10-09 10:36:16,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:16,599 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-10-09 10:36:16,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:16,599 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:16,600 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:16,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-10-09 10:36:16,800 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:16,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:16,801 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 69 times [2020-10-09 10:36:16,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:16,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476438013] [2020-10-09 10:36:16,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:16,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:16,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476438013] [2020-10-09 10:36:16,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233407255] [2020-10-09 10:36:16,878 INFO L93 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 [2020-10-09 10:36:16,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:36:16,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:16,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:16,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:17,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:17,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:17,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:17,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027250986] [2020-10-09 10:36:17,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:17,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:17,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:17,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:17,038 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-10-09 10:36:17,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:17,256 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-10-09 10:36:17,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:36:17,257 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:17,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:17,258 INFO L225 Difference]: With dead ends: 189 [2020-10-09 10:36:17,258 INFO L226 Difference]: Without dead ends: 187 [2020-10-09 10:36:17,259 INFO L673 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 [2020-10-09 10:36:17,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-09 10:36:17,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-10-09 10:36:17,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-09 10:36:17,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-10-09 10:36:17,262 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-10-09 10:36:17,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:17,263 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-10-09 10:36:17,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:17,263 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-10-09 10:36:17,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:17,263 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:17,263 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:17,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:17,471 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:17,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:17,472 INFO L82 PathProgramCache]: Analyzing trace with hash 667844321, now seen corresponding path program 70 times [2020-10-09 10:36:17,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:17,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359750431] [2020-10-09 10:36:17,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:17,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:17,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359750431] [2020-10-09 10:36:17,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162467608] [2020-10-09 10:36:17,544 INFO L93 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 [2020-10-09 10:36:17,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:36:17,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:17,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:17,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:17,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:17,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:17,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:17,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677352087] [2020-10-09 10:36:17,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:17,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:17,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:17,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:17,693 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-10-09 10:36:17,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:17,818 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-10-09 10:36:17,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:36:17,818 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:17,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:17,820 INFO L225 Difference]: With dead ends: 175 [2020-10-09 10:36:17,820 INFO L226 Difference]: Without dead ends: 173 [2020-10-09 10:36:17,820 INFO L673 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 [2020-10-09 10:36:17,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-09 10:36:17,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-10-09 10:36:17,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-09 10:36:17,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-09 10:36:17,823 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-09 10:36:17,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:17,823 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-09 10:36:17,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:17,823 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-09 10:36:17,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:17,824 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:17,824 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:18,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:18,026 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:18,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:18,026 INFO L82 PathProgramCache]: Analyzing trace with hash 667866641, now seen corresponding path program 71 times [2020-10-09 10:36:18,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:18,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298929772] [2020-10-09 10:36:18,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:18,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298929772] [2020-10-09 10:36:18,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289657549] [2020-10-09 10:36:18,092 INFO L93 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 [2020-10-09 10:36:18,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:36:18,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:18,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:18,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:18,242 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:36:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:18,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:18,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:18,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10268161] [2020-10-09 10:36:18,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:18,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:18,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:18,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:18,280 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-09 10:36:18,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:18,586 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-10-09 10:36:18,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:18,587 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:18,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:18,588 INFO L225 Difference]: With dead ends: 195 [2020-10-09 10:36:18,588 INFO L226 Difference]: Without dead ends: 190 [2020-10-09 10:36:18,588 INFO L673 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 [2020-10-09 10:36:18,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-09 10:36:18,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-10-09 10:36:18,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-09 10:36:18,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-09 10:36:18,592 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-09 10:36:18,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:18,592 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-09 10:36:18,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:18,593 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-09 10:36:18,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:18,593 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:18,593 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:18,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:18,794 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:18,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:18,794 INFO L82 PathProgramCache]: Analyzing trace with hash 667874112, now seen corresponding path program 72 times [2020-10-09 10:36:18,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:18,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975357603] [2020-10-09 10:36:18,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:18,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:18,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975357603] [2020-10-09 10:36:18,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006188785] [2020-10-09 10:36:18,867 INFO L93 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 [2020-10-09 10:36:18,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:36:18,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:18,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:18,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:19,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:19,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:19,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132605594] [2020-10-09 10:36:19,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:19,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:19,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:19,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:19,062 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-09 10:36:19,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:19,296 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-10-09 10:36:19,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 10:36:19,296 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:19,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:19,298 INFO L225 Difference]: With dead ends: 187 [2020-10-09 10:36:19,298 INFO L226 Difference]: Without dead ends: 185 [2020-10-09 10:36:19,298 INFO L673 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 [2020-10-09 10:36:19,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-09 10:36:19,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-10-09 10:36:19,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-09 10:36:19,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-09 10:36:19,302 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-09 10:36:19,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:19,302 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-09 10:36:19,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:19,303 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-09 10:36:19,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:19,303 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:19,303 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:19,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:19,504 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:19,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:19,504 INFO L82 PathProgramCache]: Analyzing trace with hash 667895471, now seen corresponding path program 73 times [2020-10-09 10:36:19,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:19,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567552869] [2020-10-09 10:36:19,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:19,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567552869] [2020-10-09 10:36:19,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622614891] [2020-10-09 10:36:19,572 INFO L93 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 [2020-10-09 10:36:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:19,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:19,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:19,727 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:36:19,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:19,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:19,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:19,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769859458] [2020-10-09 10:36:19,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:19,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:19,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:19,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:19,755 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-09 10:36:20,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:20,177 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-10-09 10:36:20,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:36:20,178 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:20,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:20,180 INFO L225 Difference]: With dead ends: 212 [2020-10-09 10:36:20,180 INFO L226 Difference]: Without dead ends: 207 [2020-10-09 10:36:20,180 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:36:20,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-09 10:36:20,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-09 10:36:20,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-09 10:36:20,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-09 10:36:20,183 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-09 10:36:20,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:20,183 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-09 10:36:20,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:20,183 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-09 10:36:20,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:20,184 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:20,184 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:20,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-10-09 10:36:20,385 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:20,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:20,386 INFO L82 PathProgramCache]: Analyzing trace with hash 667896432, now seen corresponding path program 74 times [2020-10-09 10:36:20,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:20,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832653632] [2020-10-09 10:36:20,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:20,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:20,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:20,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832653632] [2020-10-09 10:36:20,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988510127] [2020-10-09 10:36:20,455 INFO L93 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 [2020-10-09 10:36:20,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:20,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:20,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:20,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:20,601 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:36:20,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:20,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:20,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:20,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054011432] [2020-10-09 10:36:20,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:20,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:20,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:20,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:20,624 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-09 10:36:20,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:20,927 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-09 10:36:20,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:20,928 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:20,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:20,929 INFO L225 Difference]: With dead ends: 202 [2020-10-09 10:36:20,929 INFO L226 Difference]: Without dead ends: 197 [2020-10-09 10:36:20,929 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:36:20,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-09 10:36:20,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-10-09 10:36:20,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-09 10:36:20,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-10-09 10:36:20,932 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-10-09 10:36:20,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:20,932 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-10-09 10:36:20,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:20,933 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-10-09 10:36:20,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:20,933 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:20,933 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:21,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:21,134 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:21,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:21,134 INFO L82 PathProgramCache]: Analyzing trace with hash 668104752, now seen corresponding path program 75 times [2020-10-09 10:36:21,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:21,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79540346] [2020-10-09 10:36:21,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:21,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79540346] [2020-10-09 10:36:21,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537073653] [2020-10-09 10:36:21,199 INFO L93 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 [2020-10-09 10:36:21,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:36:21,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:21,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:21,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:21,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:21,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:21,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:21,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203941274] [2020-10-09 10:36:21,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:21,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:21,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:21,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:21,858 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-10-09 10:36:22,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:22,132 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-10-09 10:36:22,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:22,132 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:22,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:22,134 INFO L225 Difference]: With dead ends: 198 [2020-10-09 10:36:22,134 INFO L226 Difference]: Without dead ends: 196 [2020-10-09 10:36:22,135 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:36:22,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-09 10:36:22,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-10-09 10:36:22,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-09 10:36:22,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-09 10:36:22,140 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-09 10:36:22,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:22,140 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-09 10:36:22,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:22,141 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-09 10:36:22,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:22,141 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:22,141 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:22,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-09 10:36:22,343 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:22,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:22,343 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 76 times [2020-10-09 10:36:22,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:22,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087152313] [2020-10-09 10:36:22,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:22,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:22,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087152313] [2020-10-09 10:36:22,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114998804] [2020-10-09 10:36:22,413 INFO L93 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 [2020-10-09 10:36:22,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:36:22,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:22,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:22,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:22,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:22,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:22,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831250386] [2020-10-09 10:36:22,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:22,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:22,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:22,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:22,609 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-09 10:36:22,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:22,988 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-10-09 10:36:22,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:36:22,989 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:22,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:22,990 INFO L225 Difference]: With dead ends: 209 [2020-10-09 10:36:22,990 INFO L226 Difference]: Without dead ends: 207 [2020-10-09 10:36:22,991 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:36:22,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-09 10:36:22,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-09 10:36:22,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-09 10:36:22,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-09 10:36:22,994 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-09 10:36:22,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:22,994 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-09 10:36:22,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:22,994 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-09 10:36:22,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:22,994 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:22,994 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:23,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-09 10:36:23,195 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:23,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:23,196 INFO L82 PathProgramCache]: Analyzing trace with hash 668789201, now seen corresponding path program 77 times [2020-10-09 10:36:23,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:23,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202462692] [2020-10-09 10:36:23,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:23,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:23,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202462692] [2020-10-09 10:36:23,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522856658] [2020-10-09 10:36:23,264 INFO L93 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 [2020-10-09 10:36:23,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:36:23,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:23,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:23,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:23,410 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:36:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:23,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:23,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:23,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261017661] [2020-10-09 10:36:23,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:23,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:23,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:23,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:23,450 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-09 10:36:23,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:23,979 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-10-09 10:36:23,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:36:23,979 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:23,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:23,981 INFO L225 Difference]: With dead ends: 217 [2020-10-09 10:36:23,981 INFO L226 Difference]: Without dead ends: 212 [2020-10-09 10:36:23,981 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-09 10:36:23,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-09 10:36:23,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-10-09 10:36:23,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-09 10:36:23,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-10-09 10:36:23,985 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-10-09 10:36:23,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:23,985 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-10-09 10:36:23,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:23,985 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-10-09 10:36:23,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:23,986 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:23,986 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:24,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-09 10:36:24,194 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:24,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:24,194 INFO L82 PathProgramCache]: Analyzing trace with hash 668790162, now seen corresponding path program 78 times [2020-10-09 10:36:24,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:24,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227153519] [2020-10-09 10:36:24,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:24,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227153519] [2020-10-09 10:36:24,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821111557] [2020-10-09 10:36:24,265 INFO L93 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 [2020-10-09 10:36:24,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:36:24,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:24,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:24,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:26,482 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:36:26,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:26,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:26,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:26,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753073148] [2020-10-09 10:36:26,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:26,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:26,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:26,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-10-09 10:36:26,524 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-10-09 10:36:30,833 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-09 10:36:35,043 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-09 10:36:35,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:35,481 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-10-09 10:36:35,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:36:35,482 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:35,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:35,483 INFO L225 Difference]: With dead ends: 236 [2020-10-09 10:36:35,483 INFO L226 Difference]: Without dead ends: 228 [2020-10-09 10:36:35,483 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-10-09 10:36:35,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-09 10:36:35,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-10-09 10:36:35,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-09 10:36:35,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-10-09 10:36:35,487 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-10-09 10:36:35,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:35,487 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-10-09 10:36:35,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:35,487 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-10-09 10:36:35,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:35,487 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:35,487 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:35,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-09 10:36:35,688 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:35,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:35,689 INFO L82 PathProgramCache]: Analyzing trace with hash 668818992, now seen corresponding path program 79 times [2020-10-09 10:36:35,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:35,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335299441] [2020-10-09 10:36:35,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:35,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:35,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335299441] [2020-10-09 10:36:35,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926400117] [2020-10-09 10:36:35,761 INFO L93 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 [2020-10-09 10:36:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:35,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:35,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:35,930 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:36:35,932 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:36:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:35,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:35,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:35,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585381802] [2020-10-09 10:36:35,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:35,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:35,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:35,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:35,962 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-10-09 10:36:36,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:36,478 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-10-09 10:36:36,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:36:36,479 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:36,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:36,480 INFO L225 Difference]: With dead ends: 219 [2020-10-09 10:36:36,480 INFO L226 Difference]: Without dead ends: 214 [2020-10-09 10:36:36,481 INFO L673 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 [2020-10-09 10:36:36,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-09 10:36:36,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-10-09 10:36:36,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-09 10:36:36,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-10-09 10:36:36,484 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-10-09 10:36:36,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:36,485 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-10-09 10:36:36,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:36,485 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-10-09 10:36:36,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:36,485 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:36,485 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:36,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:36,688 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:36,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:36,688 INFO L82 PathProgramCache]: Analyzing trace with hash 675254592, now seen corresponding path program 80 times [2020-10-09 10:36:36,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:36,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520053528] [2020-10-09 10:36:36,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:36,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:36,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520053528] [2020-10-09 10:36:36,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824310462] [2020-10-09 10:36:36,757 INFO L93 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 [2020-10-09 10:36:36,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:36,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:36,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:36,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:36,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:36,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:36,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:36,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270059987] [2020-10-09 10:36:36,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:36,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:36,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:36,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:36,923 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-10-09 10:36:37,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:37,176 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-10-09 10:36:37,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:36:37,176 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:37,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:37,177 INFO L225 Difference]: With dead ends: 197 [2020-10-09 10:36:37,177 INFO L226 Difference]: Without dead ends: 195 [2020-10-09 10:36:37,177 INFO L673 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 [2020-10-09 10:36:37,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-09 10:36:37,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-10-09 10:36:37,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-09 10:36:37,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-10-09 10:36:37,180 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-10-09 10:36:37,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:37,181 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-10-09 10:36:37,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:37,181 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-10-09 10:36:37,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:37,181 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:37,181 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:37,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:37,383 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:37,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:37,384 INFO L82 PathProgramCache]: Analyzing trace with hash 675255553, now seen corresponding path program 81 times [2020-10-09 10:36:37,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:37,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998650820] [2020-10-09 10:36:37,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:37,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:37,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998650820] [2020-10-09 10:36:37,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643998828] [2020-10-09 10:36:37,454 INFO L93 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 [2020-10-09 10:36:37,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:36:37,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:37,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:37,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:37,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:37,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:37,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227292735] [2020-10-09 10:36:37,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:37,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:37,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:37,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:37,622 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-10-09 10:36:37,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:37,894 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-10-09 10:36:37,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:36:37,894 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:37,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:37,895 INFO L225 Difference]: With dead ends: 202 [2020-10-09 10:36:37,895 INFO L226 Difference]: Without dead ends: 200 [2020-10-09 10:36:37,895 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:36:37,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-09 10:36:37,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-10-09 10:36:37,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-09 10:36:37,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-10-09 10:36:37,898 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-10-09 10:36:37,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:37,898 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-10-09 10:36:37,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:37,899 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-10-09 10:36:37,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:37,899 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:37,899 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:38,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-10-09 10:36:38,100 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:38,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:38,100 INFO L82 PathProgramCache]: Analyzing trace with hash 675284383, now seen corresponding path program 82 times [2020-10-09 10:36:38,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:38,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528348719] [2020-10-09 10:36:38,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:38,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:38,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528348719] [2020-10-09 10:36:38,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923318261] [2020-10-09 10:36:38,170 INFO L93 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 [2020-10-09 10:36:38,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:36:38,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:38,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:38,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:38,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:38,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:38,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:38,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105516891] [2020-10-09 10:36:38,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:38,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:38,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:38,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:38,337 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-10-09 10:36:38,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:38,601 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-10-09 10:36:38,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:36:38,601 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:38,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:38,602 INFO L225 Difference]: With dead ends: 197 [2020-10-09 10:36:38,602 INFO L226 Difference]: Without dead ends: 195 [2020-10-09 10:36:38,603 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:36:38,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-09 10:36:38,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-10-09 10:36:38,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:36:38,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-10-09 10:36:38,606 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-10-09 10:36:38,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:38,606 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-10-09 10:36:38,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:38,606 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-10-09 10:36:38,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:38,606 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:38,606 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:38,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-09 10:36:38,807 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:38,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:38,808 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 83 times [2020-10-09 10:36:38,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:38,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711441910] [2020-10-09 10:36:38,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:38,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711441910] [2020-10-09 10:36:38,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796938470] [2020-10-09 10:36:38,873 INFO L93 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 [2020-10-09 10:36:38,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:38,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:38,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:38,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:39,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:39,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:39,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952186744] [2020-10-09 10:36:39,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:39,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:39,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:39,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:39,110 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-10-09 10:36:39,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:39,660 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-10-09 10:36:39,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 10:36:39,661 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:39,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:39,662 INFO L225 Difference]: With dead ends: 214 [2020-10-09 10:36:39,662 INFO L226 Difference]: Without dead ends: 212 [2020-10-09 10:36:39,663 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:36:39,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-09 10:36:39,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-10-09 10:36:39,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-09 10:36:39,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-10-09 10:36:39,668 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-10-09 10:36:39,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:39,668 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-10-09 10:36:39,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:39,669 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-10-09 10:36:39,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:39,669 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:39,670 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:39,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-09 10:36:39,881 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:39,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:39,882 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 84 times [2020-10-09 10:36:39,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:39,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261674558] [2020-10-09 10:36:39,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:39,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261674558] [2020-10-09 10:36:39,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169094027] [2020-10-09 10:36:39,986 INFO L93 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 [2020-10-09 10:36:40,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:36:40,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:40,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:40,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:40,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:40,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:40,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190956175] [2020-10-09 10:36:40,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:40,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:40,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:40,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:40,213 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-10-09 10:36:40,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:40,560 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-10-09 10:36:40,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:36:40,560 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:40,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:40,561 INFO L225 Difference]: With dead ends: 217 [2020-10-09 10:36:40,561 INFO L226 Difference]: Without dead ends: 215 [2020-10-09 10:36:40,562 INFO L673 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 [2020-10-09 10:36:40,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-09 10:36:40,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-10-09 10:36:40,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-09 10:36:40,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-09 10:36:40,564 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-09 10:36:40,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:40,565 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-09 10:36:40,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:40,565 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-09 10:36:40,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:40,565 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:40,565 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:40,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:40,766 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:40,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:40,766 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 85 times [2020-10-09 10:36:40,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:40,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210283597] [2020-10-09 10:36:40,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:40,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:40,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210283597] [2020-10-09 10:36:40,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055606959] [2020-10-09 10:36:40,837 INFO L93 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 [2020-10-09 10:36:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:40,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:40,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:41,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:41,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:41,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744866401] [2020-10-09 10:36:41,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:41,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:41,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:41,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:41,012 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-09 10:36:41,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:41,404 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-10-09 10:36:41,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:36:41,404 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:41,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:41,405 INFO L225 Difference]: With dead ends: 211 [2020-10-09 10:36:41,405 INFO L226 Difference]: Without dead ends: 209 [2020-10-09 10:36:41,405 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:36:41,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-09 10:36:41,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-10-09 10:36:41,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-09 10:36:41,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-09 10:36:41,409 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-09 10:36:41,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:41,409 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-09 10:36:41,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:41,409 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-09 10:36:41,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:41,409 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:41,409 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:41,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:41,610 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:41,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:41,611 INFO L82 PathProgramCache]: Analyzing trace with hash 696494831, now seen corresponding path program 86 times [2020-10-09 10:36:41,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:41,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788428452] [2020-10-09 10:36:41,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:41,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788428452] [2020-10-09 10:36:41,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368135317] [2020-10-09 10:36:41,682 INFO L93 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 [2020-10-09 10:36:41,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:41,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:41,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:41,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:41,823 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:36:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:41,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:41,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:41,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369802667] [2020-10-09 10:36:41,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:41,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:41,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:41,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:41,833 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-09 10:36:42,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:42,278 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-10-09 10:36:42,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:36:42,279 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:42,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:42,279 INFO L225 Difference]: With dead ends: 211 [2020-10-09 10:36:42,280 INFO L226 Difference]: Without dead ends: 206 [2020-10-09 10:36:42,280 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:36:42,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-09 10:36:42,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-10-09 10:36:42,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-09 10:36:42,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-09 10:36:42,283 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-09 10:36:42,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:42,283 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-09 10:36:42,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:42,283 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-09 10:36:42,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:42,283 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:42,283 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:42,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-09 10:36:42,484 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:42,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:42,485 INFO L82 PathProgramCache]: Analyzing trace with hash 696495792, now seen corresponding path program 87 times [2020-10-09 10:36:42,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:42,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193900205] [2020-10-09 10:36:42,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:42,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193900205] [2020-10-09 10:36:42,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506655568] [2020-10-09 10:36:42,558 INFO L93 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 [2020-10-09 10:36:42,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:36:42,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:42,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:42,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:42,696 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:36:42,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:42,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:42,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:42,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940286128] [2020-10-09 10:36:42,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:42,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:42,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:42,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:42,730 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-09 10:36:43,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:43,281 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-10-09 10:36:43,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 10:36:43,282 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:43,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:43,283 INFO L225 Difference]: With dead ends: 227 [2020-10-09 10:36:43,283 INFO L226 Difference]: Without dead ends: 222 [2020-10-09 10:36:43,284 INFO L673 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 [2020-10-09 10:36:43,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-09 10:36:43,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-10-09 10:36:43,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-09 10:36:43,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-09 10:36:43,287 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-09 10:36:43,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:43,287 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-09 10:36:43,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:43,287 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-09 10:36:43,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:43,287 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:43,287 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:43,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-10-09 10:36:43,488 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:43,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:43,489 INFO L82 PathProgramCache]: Analyzing trace with hash 696503263, now seen corresponding path program 88 times [2020-10-09 10:36:43,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:43,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730281696] [2020-10-09 10:36:43,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:43,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730281696] [2020-10-09 10:36:43,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759176591] [2020-10-09 10:36:43,558 INFO L93 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 [2020-10-09 10:36:43,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:36:43,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:43,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:43,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:43,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:43,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:43,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473668248] [2020-10-09 10:36:43,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:43,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:43,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:43,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:43,717 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-09 10:36:44,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:44,158 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-10-09 10:36:44,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 10:36:44,158 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:44,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:44,159 INFO L225 Difference]: With dead ends: 221 [2020-10-09 10:36:44,160 INFO L226 Difference]: Without dead ends: 219 [2020-10-09 10:36:44,160 INFO L673 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 [2020-10-09 10:36:44,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-09 10:36:44,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-10-09 10:36:44,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-09 10:36:44,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-09 10:36:44,164 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-09 10:36:44,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:44,164 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-09 10:36:44,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:44,164 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-09 10:36:44,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:44,164 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:44,165 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:44,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:44,373 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:44,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:44,373 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 89 times [2020-10-09 10:36:44,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:44,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260392021] [2020-10-09 10:36:44,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:44,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:44,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:44,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260392021] [2020-10-09 10:36:44,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424844056] [2020-10-09 10:36:44,445 INFO L93 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 [2020-10-09 10:36:44,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:36:44,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:44,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:44,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:44,574 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:36:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:44,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:44,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:44,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268829878] [2020-10-09 10:36:44,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:44,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:44,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:44,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:44,585 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-09 10:36:45,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:45,138 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-10-09 10:36:45,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:36:45,138 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:45,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:45,139 INFO L225 Difference]: With dead ends: 240 [2020-10-09 10:36:45,139 INFO L226 Difference]: Without dead ends: 232 [2020-10-09 10:36:45,140 INFO L673 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 [2020-10-09 10:36:45,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-09 10:36:45,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-10-09 10:36:45,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-09 10:36:45,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-10-09 10:36:45,142 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-10-09 10:36:45,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:45,142 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-10-09 10:36:45,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:45,142 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-10-09 10:36:45,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:45,142 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:45,143 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:45,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-09 10:36:45,343 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:45,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:45,344 INFO L82 PathProgramCache]: Analyzing trace with hash 696525583, now seen corresponding path program 90 times [2020-10-09 10:36:45,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:45,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522018210] [2020-10-09 10:36:45,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:45,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:45,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:45,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522018210] [2020-10-09 10:36:45,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594697167] [2020-10-09 10:36:45,416 INFO L93 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 [2020-10-09 10:36:45,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:36:45,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:45,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:45,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:45,592 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:36:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:45,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:45,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:45,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818511629] [2020-10-09 10:36:45,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:45,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:45,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:45,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:45,609 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-10-09 10:36:46,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:46,187 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-10-09 10:36:46,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:36:46,188 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:46,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:46,189 INFO L225 Difference]: With dead ends: 238 [2020-10-09 10:36:46,189 INFO L226 Difference]: Without dead ends: 230 [2020-10-09 10:36:46,189 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:36:46,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-09 10:36:46,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-10-09 10:36:46,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:36:46,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-09 10:36:46,192 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-09 10:36:46,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:46,192 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-09 10:36:46,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:46,192 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-09 10:36:46,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:46,193 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:46,193 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:46,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:46,393 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:46,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:46,394 INFO L82 PathProgramCache]: Analyzing trace with hash 696733903, now seen corresponding path program 91 times [2020-10-09 10:36:46,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:46,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234737151] [2020-10-09 10:36:46,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:46,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:46,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:46,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234737151] [2020-10-09 10:36:46,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336392306] [2020-10-09 10:36:46,464 INFO L93 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 [2020-10-09 10:36:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:46,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:46,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:46,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:46,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:46,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880498612] [2020-10-09 10:36:46,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:46,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:46,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:46,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:46,627 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-09 10:36:46,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:46,866 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-10-09 10:36:46,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:46,867 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:46,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:46,868 INFO L225 Difference]: With dead ends: 195 [2020-10-09 10:36:46,868 INFO L226 Difference]: Without dead ends: 193 [2020-10-09 10:36:46,868 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:36:46,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-09 10:36:46,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-10-09 10:36:46,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:36:46,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-09 10:36:46,872 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-09 10:36:46,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:46,872 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-09 10:36:46,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:46,872 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-09 10:36:46,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:46,872 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:46,873 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:47,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-10-09 10:36:47,081 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:47,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:47,081 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 92 times [2020-10-09 10:36:47,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:47,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455233437] [2020-10-09 10:36:47,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:47,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455233437] [2020-10-09 10:36:47,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415537421] [2020-10-09 10:36:47,156 INFO L93 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 [2020-10-09 10:36:47,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:47,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:47,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:47,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:47,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:47,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:47,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068422623] [2020-10-09 10:36:47,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:47,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:47,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:47,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:47,334 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-09 10:36:47,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:47,789 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-10-09 10:36:47,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:36:47,790 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:47,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:47,790 INFO L225 Difference]: With dead ends: 206 [2020-10-09 10:36:47,790 INFO L226 Difference]: Without dead ends: 204 [2020-10-09 10:36:47,791 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:36:47,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-09 10:36:47,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-10-09 10:36:47,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-09 10:36:47,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-10-09 10:36:47,793 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-10-09 10:36:47,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:47,793 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-10-09 10:36:47,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:47,794 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-10-09 10:36:47,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:47,794 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:47,794 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:47,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:47,995 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:47,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:47,995 INFO L82 PathProgramCache]: Analyzing trace with hash 697419313, now seen corresponding path program 93 times [2020-10-09 10:36:47,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:47,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795424204] [2020-10-09 10:36:47,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:48,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795424204] [2020-10-09 10:36:48,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166495114] [2020-10-09 10:36:48,070 INFO L93 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 [2020-10-09 10:36:48,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:36:48,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:48,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:36:48,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:48,205 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:36:48,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:48,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:48,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:48,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348947683] [2020-10-09 10:36:48,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:48,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:48,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:48,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:48,232 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 15 states. [2020-10-09 10:36:48,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:48,790 INFO L93 Difference]: Finished difference Result 224 states and 535 transitions. [2020-10-09 10:36:48,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:36:48,791 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:48,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:48,791 INFO L225 Difference]: With dead ends: 224 [2020-10-09 10:36:48,791 INFO L226 Difference]: Without dead ends: 219 [2020-10-09 10:36:48,792 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=660, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:36:48,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-09 10:36:48,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 139. [2020-10-09 10:36:48,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-09 10:36:48,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-10-09 10:36:48,796 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-10-09 10:36:48,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:48,796 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-10-09 10:36:48,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:48,796 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-10-09 10:36:48,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:48,797 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:48,797 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:49,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-10-09 10:36:49,008 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:49,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:49,008 INFO L82 PathProgramCache]: Analyzing trace with hash 896899632, now seen corresponding path program 94 times [2020-10-09 10:36:49,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:49,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875075202] [2020-10-09 10:36:49,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:49,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:49,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875075202] [2020-10-09 10:36:49,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39197527] [2020-10-09 10:36:49,086 INFO L93 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 [2020-10-09 10:36:49,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:36:49,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:49,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:49,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:49,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:49,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:49,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550843733] [2020-10-09 10:36:49,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:49,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:49,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:49,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:49,246 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-10-09 10:36:49,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:49,450 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-09 10:36:49,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:49,451 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:49,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:49,451 INFO L225 Difference]: With dead ends: 194 [2020-10-09 10:36:49,452 INFO L226 Difference]: Without dead ends: 192 [2020-10-09 10:36:49,452 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:36:49,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-09 10:36:49,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-10-09 10:36:49,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-09 10:36:49,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-10-09 10:36:49,455 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-10-09 10:36:49,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:49,456 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-10-09 10:36:49,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:49,456 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-10-09 10:36:49,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:49,456 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:49,456 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:49,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:49,666 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:49,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:49,666 INFO L82 PathProgramCache]: Analyzing trace with hash 896900593, now seen corresponding path program 95 times [2020-10-09 10:36:49,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:49,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571170571] [2020-10-09 10:36:49,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:49,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:49,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571170571] [2020-10-09 10:36:49,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310392015] [2020-10-09 10:36:49,744 INFO L93 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 [2020-10-09 10:36:49,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:36:49,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:49,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:49,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:49,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:49,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:49,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068162696] [2020-10-09 10:36:49,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:49,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:49,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:49,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:49,907 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-10-09 10:36:50,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:50,179 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-10-09 10:36:50,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:36:50,180 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:50,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:50,180 INFO L225 Difference]: With dead ends: 205 [2020-10-09 10:36:50,180 INFO L226 Difference]: Without dead ends: 203 [2020-10-09 10:36:50,181 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:36:50,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-09 10:36:50,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-10-09 10:36:50,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:36:50,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-10-09 10:36:50,184 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-10-09 10:36:50,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:50,184 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-10-09 10:36:50,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:50,185 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-10-09 10:36:50,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:50,185 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:50,185 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:50,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:50,394 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:50,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:50,394 INFO L82 PathProgramCache]: Analyzing trace with hash 896929423, now seen corresponding path program 96 times [2020-10-09 10:36:50,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:50,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861444893] [2020-10-09 10:36:50,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:50,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861444893] [2020-10-09 10:36:50,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402316818] [2020-10-09 10:36:50,478 INFO L93 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 [2020-10-09 10:36:50,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:36:50,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:50,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:50,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:50,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:50,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:50,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443571354] [2020-10-09 10:36:50,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:50,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:50,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:50,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:50,632 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-10-09 10:36:50,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:50,870 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-09 10:36:50,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:36:50,870 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:50,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:50,871 INFO L225 Difference]: With dead ends: 201 [2020-10-09 10:36:50,871 INFO L226 Difference]: Without dead ends: 199 [2020-10-09 10:36:50,871 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:36:50,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-09 10:36:50,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-10-09 10:36:50,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-09 10:36:50,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-10-09 10:36:50,874 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-10-09 10:36:50,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:50,874 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-10-09 10:36:50,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:50,874 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-10-09 10:36:50,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:50,875 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:50,875 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:51,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:51,076 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:51,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:51,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 97 times [2020-10-09 10:36:51,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:51,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305534772] [2020-10-09 10:36:51,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:51,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:51,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305534772] [2020-10-09 10:36:51,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358988179] [2020-10-09 10:36:51,145 INFO L93 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 [2020-10-09 10:36:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:51,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:51,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:51,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:51,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:51,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886998247] [2020-10-09 10:36:51,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:51,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:51,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:51,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:51,308 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-10-09 10:36:51,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:51,524 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-09 10:36:51,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:51,525 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:51,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:51,526 INFO L225 Difference]: With dead ends: 194 [2020-10-09 10:36:51,526 INFO L226 Difference]: Without dead ends: 192 [2020-10-09 10:36:51,526 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-10-09 10:36:51,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-09 10:36:51,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-10-09 10:36:51,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-09 10:36:51,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-10-09 10:36:51,529 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-10-09 10:36:51,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:51,529 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-10-09 10:36:51,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:51,529 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-10-09 10:36:51,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:51,529 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:51,529 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:51,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-09 10:36:51,730 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:51,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:51,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 98 times [2020-10-09 10:36:51,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:51,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045239953] [2020-10-09 10:36:51,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:51,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045239953] [2020-10-09 10:36:51,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160328868] [2020-10-09 10:36:51,802 INFO L93 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 [2020-10-09 10:36:51,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:51,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:51,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:51,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:51,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:51,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:51,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:51,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12136418] [2020-10-09 10:36:51,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:51,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:51,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:51,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:51,971 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-10-09 10:36:52,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:52,282 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-10-09 10:36:52,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:36:52,283 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:52,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:52,284 INFO L225 Difference]: With dead ends: 209 [2020-10-09 10:36:52,284 INFO L226 Difference]: Without dead ends: 207 [2020-10-09 10:36:52,284 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:36:52,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-09 10:36:52,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-10-09 10:36:52,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-09 10:36:52,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-10-09 10:36:52,287 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-10-09 10:36:52,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:52,287 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-10-09 10:36:52,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:52,287 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-10-09 10:36:52,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:52,288 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:52,288 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:52,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:52,489 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:52,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:52,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 99 times [2020-10-09 10:36:52,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:52,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548210352] [2020-10-09 10:36:52,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:52,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:52,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:52,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548210352] [2020-10-09 10:36:52,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61470948] [2020-10-09 10:36:52,559 INFO L93 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 [2020-10-09 10:36:52,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:36:52,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:52,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:52,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:52,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:52,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:52,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275555521] [2020-10-09 10:36:52,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:52,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:52,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:52,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:52,728 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-10-09 10:36:53,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:53,029 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-10-09 10:36:53,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:36:53,030 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:53,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:53,031 INFO L225 Difference]: With dead ends: 202 [2020-10-09 10:36:53,031 INFO L226 Difference]: Without dead ends: 200 [2020-10-09 10:36:53,031 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:36:53,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-09 10:36:53,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-10-09 10:36:53,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-09 10:36:53,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-09 10:36:53,034 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-09 10:36:53,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:53,034 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-09 10:36:53,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:53,034 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-09 10:36:53,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:53,034 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:53,035 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:53,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-09 10:36:53,243 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:53,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:53,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 100 times [2020-10-09 10:36:53,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:53,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322743289] [2020-10-09 10:36:53,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:53,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322743289] [2020-10-09 10:36:53,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956207492] [2020-10-09 10:36:53,314 INFO L93 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 [2020-10-09 10:36:53,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:36:53,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:53,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:53,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:53,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:53,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:53,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404249845] [2020-10-09 10:36:53,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:53,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:53,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:53,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:53,476 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-10-09 10:36:53,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:53,751 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-09 10:36:53,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:36:53,752 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:53,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:53,752 INFO L225 Difference]: With dead ends: 201 [2020-10-09 10:36:53,753 INFO L226 Difference]: Without dead ends: 199 [2020-10-09 10:36:53,753 INFO L673 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 [2020-10-09 10:36:53,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-09 10:36:53,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-10-09 10:36:53,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-09 10:36:53,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-10-09 10:36:53,756 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-10-09 10:36:53,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:53,757 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-10-09 10:36:53,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:53,757 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-10-09 10:36:53,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:53,757 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:53,757 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:53,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-09 10:36:53,960 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:53,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:53,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 101 times [2020-10-09 10:36:53,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:53,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364712012] [2020-10-09 10:36:53,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:54,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:54,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364712012] [2020-10-09 10:36:54,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471088474] [2020-10-09 10:36:54,030 INFO L93 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 [2020-10-09 10:36:54,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:36:54,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:54,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:54,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:54,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:54,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:54,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472549357] [2020-10-09 10:36:54,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:54,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:54,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:54,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:54,201 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-10-09 10:36:54,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:54,606 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-10-09 10:36:54,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 10:36:54,607 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:54,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:54,607 INFO L225 Difference]: With dead ends: 215 [2020-10-09 10:36:54,608 INFO L226 Difference]: Without dead ends: 213 [2020-10-09 10:36:54,608 INFO L673 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 [2020-10-09 10:36:54,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-09 10:36:54,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-10-09 10:36:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:36:54,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-09 10:36:54,611 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-09 10:36:54,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:54,612 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-09 10:36:54,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:54,612 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-09 10:36:54,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:54,612 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:54,612 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:54,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:54,816 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:54,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:54,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 102 times [2020-10-09 10:36:54,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:54,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685854387] [2020-10-09 10:36:54,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:54,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685854387] [2020-10-09 10:36:54,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112450772] [2020-10-09 10:36:54,888 INFO L93 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 [2020-10-09 10:36:54,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:36:54,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:54,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:54,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:55,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:55,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:55,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:55,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082546009] [2020-10-09 10:36:55,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:55,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:55,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:55,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:55,042 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-09 10:36:55,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:55,388 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-10-09 10:36:55,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:36:55,389 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:55,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:55,390 INFO L225 Difference]: With dead ends: 196 [2020-10-09 10:36:55,391 INFO L226 Difference]: Without dead ends: 194 [2020-10-09 10:36:55,391 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:36:55,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-09 10:36:55,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-10-09 10:36:55,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-09 10:36:55,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-09 10:36:55,394 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-09 10:36:55,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:55,394 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-09 10:36:55,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:55,394 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-09 10:36:55,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:55,395 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:55,395 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:55,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:55,597 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:55,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:55,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1555369361, now seen corresponding path program 103 times [2020-10-09 10:36:55,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:55,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614437348] [2020-10-09 10:36:55,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:55,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:55,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:55,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614437348] [2020-10-09 10:36:55,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421781760] [2020-10-09 10:36:55,669 INFO L93 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 [2020-10-09 10:36:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:55,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:55,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:55,799 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:36:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:55,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:55,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:55,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710168929] [2020-10-09 10:36:55,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:55,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:55,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:55,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:55,815 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-09 10:36:56,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:56,081 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-10-09 10:36:56,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:56,082 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:56,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:56,083 INFO L225 Difference]: With dead ends: 191 [2020-10-09 10:36:56,083 INFO L226 Difference]: Without dead ends: 186 [2020-10-09 10:36:56,084 INFO L673 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 [2020-10-09 10:36:56,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-09 10:36:56,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-10-09 10:36:56,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-09 10:36:56,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-09 10:36:56,087 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-09 10:36:56,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:56,087 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-09 10:36:56,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:56,087 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-09 10:36:56,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:56,088 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:56,088 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:56,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-09 10:36:56,291 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:56,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:56,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1555370322, now seen corresponding path program 104 times [2020-10-09 10:36:56,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:56,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055148674] [2020-10-09 10:36:56,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:56,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055148674] [2020-10-09 10:36:56,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164718802] [2020-10-09 10:36:56,365 INFO L93 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 [2020-10-09 10:36:56,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:56,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:56,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:56,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:56,502 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:36:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:56,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:56,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:56,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334726866] [2020-10-09 10:36:56,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:56,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:56,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:56,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:56,539 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-09 10:36:57,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:57,043 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-10-09 10:36:57,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:36:57,043 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:57,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:57,044 INFO L225 Difference]: With dead ends: 232 [2020-10-09 10:36:57,044 INFO L226 Difference]: Without dead ends: 227 [2020-10-09 10:36:57,045 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:36:57,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-09 10:36:57,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-10-09 10:36:57,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:36:57,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-09 10:36:57,049 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-09 10:36:57,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:57,049 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-09 10:36:57,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:57,049 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-09 10:36:57,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:57,050 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:57,050 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:57,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:57,260 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:57,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:57,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1555377793, now seen corresponding path program 105 times [2020-10-09 10:36:57,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:57,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599413145] [2020-10-09 10:36:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:57,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599413145] [2020-10-09 10:36:57,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025210777] [2020-10-09 10:36:57,335 INFO L93 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 [2020-10-09 10:36:57,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:36:57,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:57,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 10:36:57,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:57,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:57,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:57,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:57,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512208081] [2020-10-09 10:36:57,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:57,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:57,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:57,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:57,485 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-09 10:36:58,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:58,135 INFO L93 Difference]: Finished difference Result 243 states and 560 transitions. [2020-10-09 10:36:58,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 10:36:58,136 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:58,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:58,136 INFO L225 Difference]: With dead ends: 243 [2020-10-09 10:36:58,137 INFO L226 Difference]: Without dead ends: 239 [2020-10-09 10:36:58,137 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=841, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:36:58,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-09 10:36:58,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 144. [2020-10-09 10:36:58,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-09 10:36:58,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-09 10:36:58,140 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-09 10:36:58,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:58,140 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-09 10:36:58,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:58,140 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-09 10:36:58,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:58,141 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:58,141 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:58,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:58,342 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:58,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:58,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 106 times [2020-10-09 10:36:58,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:58,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208508278] [2020-10-09 10:36:58,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:58,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:58,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208508278] [2020-10-09 10:36:58,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521739860] [2020-10-09 10:36:58,417 INFO L93 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 [2020-10-09 10:36:58,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:36:58,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:58,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:58,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:58,568 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:36:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:58,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:58,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:58,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032568091] [2020-10-09 10:36:58,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:58,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:58,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:58,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:58,599 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-09 10:36:59,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:59,290 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-10-09 10:36:59,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:36:59,290 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:59,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:59,291 INFO L225 Difference]: With dead ends: 254 [2020-10-09 10:36:59,291 INFO L226 Difference]: Without dead ends: 246 [2020-10-09 10:36:59,292 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:36:59,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-09 10:36:59,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-10-09 10:36:59,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-09 10:36:59,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-10-09 10:36:59,296 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-10-09 10:36:59,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:59,296 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-10-09 10:36:59,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:59,296 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-10-09 10:36:59,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:59,297 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:59,297 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:59,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:59,508 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:59,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:59,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1555400113, now seen corresponding path program 107 times [2020-10-09 10:36:59,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:59,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783168394] [2020-10-09 10:36:59,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:59,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:59,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783168394] [2020-10-09 10:36:59,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864115980] [2020-10-09 10:36:59,583 INFO L93 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 [2020-10-09 10:36:59,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:36:59,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:59,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:59,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:59,731 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:36:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:59,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:59,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:59,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216541164] [2020-10-09 10:36:59,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:59,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:59,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:59,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:59,754 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-10-09 10:37:00,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:00,462 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-10-09 10:37:00,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:37:00,463 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:37:00,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:00,463 INFO L225 Difference]: With dead ends: 246 [2020-10-09 10:37:00,464 INFO L226 Difference]: Without dead ends: 238 [2020-10-09 10:37:00,464 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-10-09 10:37:00,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-09 10:37:00,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-10-09 10:37:00,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-09 10:37:00,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-10-09 10:37:00,467 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-10-09 10:37:00,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:00,467 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-10-09 10:37:00,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:37:00,467 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-10-09 10:37:00,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:37:00,468 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:00,468 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:00,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-10-09 10:37:00,669 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:00,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:00,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1555608433, now seen corresponding path program 108 times [2020-10-09 10:37:00,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:00,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718516452] [2020-10-09 10:37:00,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:00,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:00,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718516452] [2020-10-09 10:37:00,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398443937] [2020-10-09 10:37:00,741 INFO L93 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 [2020-10-09 10:37:00,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:37:00,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:00,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:37:00,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:00,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:00,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:00,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:37:00,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648418323] [2020-10-09 10:37:00,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:37:00,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:00,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:37:00,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:37:00,902 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-10-09 10:37:01,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:01,279 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-10-09 10:37:01,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:37:01,280 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:37:01,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:01,280 INFO L225 Difference]: With dead ends: 208 [2020-10-09 10:37:01,281 INFO L226 Difference]: Without dead ends: 206 [2020-10-09 10:37:01,281 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:37:01,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-09 10:37:01,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-10-09 10:37:01,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-09 10:37:01,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-10-09 10:37:01,284 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-10-09 10:37:01,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:01,284 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-10-09 10:37:01,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:37:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-10-09 10:37:01,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:37:01,284 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:01,284 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:01,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-09 10:37:01,485 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:01,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:01,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 109 times [2020-10-09 10:37:01,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:01,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726638641] [2020-10-09 10:37:01,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:01,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726638641] [2020-10-09 10:37:01,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776667660] [2020-10-09 10:37:01,561 INFO L93 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 [2020-10-09 10:37:01,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:01,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:37:01,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:01,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:01,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:01,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:37:01,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906106630] [2020-10-09 10:37:01,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:37:01,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:01,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:37:01,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:37:01,709 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-10-09 10:37:02,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:02,181 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-10-09 10:37:02,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:37:02,182 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:37:02,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:02,183 INFO L225 Difference]: With dead ends: 215 [2020-10-09 10:37:02,183 INFO L226 Difference]: Without dead ends: 213 [2020-10-09 10:37:02,183 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-10-09 10:37:02,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-09 10:37:02,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-10-09 10:37:02,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-09 10:37:02,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-09 10:37:02,186 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-09 10:37:02,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:02,186 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-09 10:37:02,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:37:02,186 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-09 10:37:02,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:37:02,186 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:02,187 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:02,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-10-09 10:37:02,387 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:02,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:02,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 110 times [2020-10-09 10:37:02,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:02,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592075243] [2020-10-09 10:37:02,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:02,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592075243] [2020-10-09 10:37:02,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433022597] [2020-10-09 10:37:02,462 INFO L93 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 [2020-10-09 10:37:02,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:37:02,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:02,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:37:02,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:02,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:37:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:02,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:02,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:37:02,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607167956] [2020-10-09 10:37:02,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:37:02,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:02,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:37:02,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:37:02,608 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-09 10:37:03,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:03,127 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-10-09 10:37:03,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:37:03,128 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:37:03,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:03,128 INFO L225 Difference]: With dead ends: 236 [2020-10-09 10:37:03,128 INFO L226 Difference]: Without dead ends: 228 [2020-10-09 10:37:03,129 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:37:03,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-09 10:37:03,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-10-09 10:37:03,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-09 10:37:03,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-09 10:37:03,131 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-09 10:37:03,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:03,132 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-09 10:37:03,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:37:03,132 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-09 10:37:03,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:37:03,132 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:03,132 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:03,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-09 10:37:03,334 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:03,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:03,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1556293843, now seen corresponding path program 111 times [2020-10-09 10:37:03,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:03,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734921782] [2020-10-09 10:37:03,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:03,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:03,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734921782] [2020-10-09 10:37:03,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803787221] [2020-10-09 10:37:03,412 INFO L93 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 [2020-10-09 10:37:03,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:37:03,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:03,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:37:03,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:03,550 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:37:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:03,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:03,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:37:03,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518446320] [2020-10-09 10:37:03,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:37:03,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:03,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:37:03,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:37:03,560 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-09 10:37:04,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:04,139 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-10-09 10:37:04,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:37:04,139 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:37:04,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:04,140 INFO L225 Difference]: With dead ends: 241 [2020-10-09 10:37:04,140 INFO L226 Difference]: Without dead ends: 233 [2020-10-09 10:37:04,140 INFO L673 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 [2020-10-09 10:37:04,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-09 10:37:04,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-10-09 10:37:04,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-09 10:37:04,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-10-09 10:37:04,143 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-10-09 10:37:04,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:04,144 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-10-09 10:37:04,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:37:04,144 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-10-09 10:37:04,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:37:04,144 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:04,144 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:04,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-09 10:37:04,345 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:04,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:04,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1556322673, now seen corresponding path program 112 times [2020-10-09 10:37:04,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:04,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251451749] [2020-10-09 10:37:04,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:04,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251451749] [2020-10-09 10:37:04,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103218344] [2020-10-09 10:37:04,421 INFO L93 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 [2020-10-09 10:37:04,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:37:04,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:04,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:37:04,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:04,560 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:37:04,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:04,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:04,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:37:04,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301194636] [2020-10-09 10:37:04,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:37:04,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:04,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:37:04,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:37:04,574 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-10-09 10:37:05,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:05,120 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-10-09 10:37:05,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 10:37:05,120 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:37:05,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:05,121 INFO L225 Difference]: With dead ends: 232 [2020-10-09 10:37:05,122 INFO L226 Difference]: Without dead ends: 224 [2020-10-09 10:37:05,122 INFO L673 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 [2020-10-09 10:37:05,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-09 10:37:05,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-10-09 10:37:05,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-09 10:37:05,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-10-09 10:37:05,125 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-10-09 10:37:05,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:05,125 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-10-09 10:37:05,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:37:05,125 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-10-09 10:37:05,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:37:05,126 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:05,126 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:05,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:05,326 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:05,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:05,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1725446472, now seen corresponding path program 6 times [2020-10-09 10:37:05,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:05,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711213983] [2020-10-09 10:37:05,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:05,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711213983] [2020-10-09 10:37:05,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209590280] [2020-10-09 10:37:05,429 INFO L93 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 [2020-10-09 10:37:05,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-09 10:37:05,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:05,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 10:37:05,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:05,552 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:05,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-09 10:37:05,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2020-10-09 10:37:05,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313849378] [2020-10-09 10:37:05,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 10:37:05,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:05,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 10:37:05,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-09 10:37:05,553 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 8 states. [2020-10-09 10:37:05,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:05,580 INFO L93 Difference]: Finished difference Result 195 states and 513 transitions. [2020-10-09 10:37:05,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 10:37:05,581 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-10-09 10:37:05,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:05,582 INFO L225 Difference]: With dead ends: 195 [2020-10-09 10:37:05,582 INFO L226 Difference]: Without dead ends: 188 [2020-10-09 10:37:05,582 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-09 10:37:05,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-09 10:37:05,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2020-10-09 10:37:05,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-09 10:37:05,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 500 transitions. [2020-10-09 10:37:05,585 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 500 transitions. Word has length 13 [2020-10-09 10:37:05,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:05,585 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 500 transitions. [2020-10-09 10:37:05,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 10:37:05,586 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 500 transitions. [2020-10-09 10:37:05,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:37:05,586 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:05,586 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:05,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-10-09 10:37:05,794 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:05,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:05,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 21 times [2020-10-09 10:37:05,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:05,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857636956] [2020-10-09 10:37:05,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:05,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857636956] [2020-10-09 10:37:05,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336745208] [2020-10-09 10:37:05,998 INFO L93 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 [2020-10-09 10:37:06,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-09 10:37:06,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:06,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:06,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:06,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:06,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:06,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066576588] [2020-10-09 10:37:06,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:06,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:06,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:06,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:06,230 INFO L87 Difference]: Start difference. First operand 188 states and 500 transitions. Second operand 17 states. [2020-10-09 10:37:06,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:06,281 INFO L93 Difference]: Finished difference Result 249 states and 638 transitions. [2020-10-09 10:37:06,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:37:06,282 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-09 10:37:06,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:06,283 INFO L225 Difference]: With dead ends: 249 [2020-10-09 10:37:06,283 INFO L226 Difference]: Without dead ends: 241 [2020-10-09 10:37:06,284 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:06,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-09 10:37:06,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 197. [2020-10-09 10:37:06,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-09 10:37:06,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 521 transitions. [2020-10-09 10:37:06,287 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 521 transitions. Word has length 13 [2020-10-09 10:37:06,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:06,288 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 521 transitions. [2020-10-09 10:37:06,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:06,288 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 521 transitions. [2020-10-09 10:37:06,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:37:06,288 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:06,288 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:06,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-09 10:37:06,489 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:06,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:06,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1413108102, now seen corresponding path program 22 times [2020-10-09 10:37:06,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:06,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768631281] [2020-10-09 10:37:06,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:06,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768631281] [2020-10-09 10:37:06,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716595327] [2020-10-09 10:37:06,625 INFO L93 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:06,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:37:06,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:06,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 10:37:06,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:06,734 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:06,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-09 10:37:06,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2020-10-09 10:37:06,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383868231] [2020-10-09 10:37:06,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 10:37:06,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:06,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 10:37:06,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-09 10:37:06,736 INFO L87 Difference]: Start difference. First operand 197 states and 521 transitions. Second operand 8 states. [2020-10-09 10:37:06,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:06,760 INFO L93 Difference]: Finished difference Result 278 states and 705 transitions. [2020-10-09 10:37:06,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 10:37:06,761 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-10-09 10:37:06,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:06,761 INFO L225 Difference]: With dead ends: 278 [2020-10-09 10:37:06,761 INFO L226 Difference]: Without dead ends: 248 [2020-10-09 10:37:06,761 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-09 10:37:06,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-09 10:37:06,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 240. [2020-10-09 10:37:06,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-09 10:37:06,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 626 transitions. [2020-10-09 10:37:06,764 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 626 transitions. Word has length 13 [2020-10-09 10:37:06,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:06,764 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 626 transitions. [2020-10-09 10:37:06,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 10:37:06,765 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 626 transitions. [2020-10-09 10:37:06,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:06,765 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:06,765 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:06,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:06,967 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:06,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:06,968 INFO L82 PathProgramCache]: Analyzing trace with hash 2094057644, now seen corresponding path program 113 times [2020-10-09 10:37:06,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:06,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383841528] [2020-10-09 10:37:06,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:07,082 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:07,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383841528] [2020-10-09 10:37:07,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127195966] [2020-10-09 10:37:07,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-10-09 10:37:07,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:37:07,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:07,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:07,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:07,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:07,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:07,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780019568] [2020-10-09 10:37:07,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:07,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:07,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:07,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:07,301 INFO L87 Difference]: Start difference. First operand 240 states and 626 transitions. Second operand 17 states. [2020-10-09 10:37:07,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:07,367 INFO L93 Difference]: Finished difference Result 275 states and 692 transitions. [2020-10-09 10:37:07,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:37:07,367 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:07,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:07,368 INFO L225 Difference]: With dead ends: 275 [2020-10-09 10:37:07,368 INFO L226 Difference]: Without dead ends: 273 [2020-10-09 10:37:07,369 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:07,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-09 10:37:07,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 250. [2020-10-09 10:37:07,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-09 10:37:07,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 654 transitions. [2020-10-09 10:37:07,372 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 654 transitions. Word has length 14 [2020-10-09 10:37:07,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:07,373 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 654 transitions. [2020-10-09 10:37:07,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:07,373 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 654 transitions. [2020-10-09 10:37:07,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:07,373 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:07,373 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:07,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:07,574 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:07,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:07,575 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 114 times [2020-10-09 10:37:07,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:07,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237613042] [2020-10-09 10:37:07,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:07,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:07,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:07,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237613042] [2020-10-09 10:37:07,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536654585] [2020-10-09 10:37:07,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-10-09 10:37:07,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:37:07,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:07,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:07,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:07,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:07,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:07,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668716881] [2020-10-09 10:37:07,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:07,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:07,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:07,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:07,880 INFO L87 Difference]: Start difference. First operand 250 states and 654 transitions. Second operand 17 states. [2020-10-09 10:37:08,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:08,101 INFO L93 Difference]: Finished difference Result 295 states and 735 transitions. [2020-10-09 10:37:08,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:37:08,102 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:08,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:08,103 INFO L225 Difference]: With dead ends: 295 [2020-10-09 10:37:08,103 INFO L226 Difference]: Without dead ends: 292 [2020-10-09 10:37:08,105 INFO L673 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 [2020-10-09 10:37:08,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-09 10:37:08,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 251. [2020-10-09 10:37:08,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-09 10:37:08,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 657 transitions. [2020-10-09 10:37:08,109 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 657 transitions. Word has length 14 [2020-10-09 10:37:08,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:08,109 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 657 transitions. [2020-10-09 10:37:08,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:08,110 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 657 transitions. [2020-10-09 10:37:08,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:08,110 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:08,110 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:08,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:08,319 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:08,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:08,319 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 115 times [2020-10-09 10:37:08,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:08,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465757805] [2020-10-09 10:37:08,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:08,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:08,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465757805] [2020-10-09 10:37:08,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603314806] [2020-10-09 10:37:08,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-10-09 10:37:08,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:08,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:08,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:08,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:08,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:08,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642429352] [2020-10-09 10:37:08,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:08,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:08,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:08,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:08,804 INFO L87 Difference]: Start difference. First operand 251 states and 657 transitions. Second operand 17 states. [2020-10-09 10:37:09,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:09,061 INFO L93 Difference]: Finished difference Result 320 states and 793 transitions. [2020-10-09 10:37:09,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:37:09,061 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:09,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:09,062 INFO L225 Difference]: With dead ends: 320 [2020-10-09 10:37:09,062 INFO L226 Difference]: Without dead ends: 316 [2020-10-09 10:37:09,063 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:37:09,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-09 10:37:09,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 253. [2020-10-09 10:37:09,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-09 10:37:09,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 663 transitions. [2020-10-09 10:37:09,068 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 663 transitions. Word has length 14 [2020-10-09 10:37:09,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:09,068 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 663 transitions. [2020-10-09 10:37:09,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:09,068 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 663 transitions. [2020-10-09 10:37:09,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:09,069 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:09,069 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:09,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:09,279 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:09,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:09,280 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 116 times [2020-10-09 10:37:09,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:09,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91448883] [2020-10-09 10:37:09,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:09,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91448883] [2020-10-09 10:37:09,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013613535] [2020-10-09 10:37:09,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-10-09 10:37:09,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:37:09,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:09,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:09,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:09,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:09,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:09,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:09,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276501284] [2020-10-09 10:37:09,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:09,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:09,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:09,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:09,638 INFO L87 Difference]: Start difference. First operand 253 states and 663 transitions. Second operand 17 states. [2020-10-09 10:37:09,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:09,919 INFO L93 Difference]: Finished difference Result 316 states and 781 transitions. [2020-10-09 10:37:09,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:37:09,920 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:09,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:09,920 INFO L225 Difference]: With dead ends: 316 [2020-10-09 10:37:09,920 INFO L226 Difference]: Without dead ends: 313 [2020-10-09 10:37:09,920 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:37:09,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-09 10:37:09,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 255. [2020-10-09 10:37:09,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-09 10:37:09,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 669 transitions. [2020-10-09 10:37:09,925 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 669 transitions. Word has length 14 [2020-10-09 10:37:09,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:09,926 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 669 transitions. [2020-10-09 10:37:09,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:09,926 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 669 transitions. [2020-10-09 10:37:09,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:09,926 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:09,926 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:10,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-10-09 10:37:10,129 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:10,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:10,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2094982126, now seen corresponding path program 117 times [2020-10-09 10:37:10,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:10,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431439256] [2020-10-09 10:37:10,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:10,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:10,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431439256] [2020-10-09 10:37:10,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034054074] [2020-10-09 10:37:10,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-10-09 10:37:10,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:37:10,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:10,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:10,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:13,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:13,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:13,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581278572] [2020-10-09 10:37:13,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:13,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:13,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:13,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-10-09 10:37:13,827 INFO L87 Difference]: Start difference. First operand 255 states and 669 transitions. Second operand 17 states. [2020-10-09 10:37:18,038 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-09 10:37:18,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:18,262 INFO L93 Difference]: Finished difference Result 342 states and 843 transitions. [2020-10-09 10:37:18,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 10:37:18,263 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:18,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:18,264 INFO L225 Difference]: With dead ends: 342 [2020-10-09 10:37:18,264 INFO L226 Difference]: Without dead ends: 337 [2020-10-09 10:37:18,264 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-10-09 10:37:18,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-09 10:37:18,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 256. [2020-10-09 10:37:18,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-09 10:37:18,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 672 transitions. [2020-10-09 10:37:18,269 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 672 transitions. Word has length 14 [2020-10-09 10:37:18,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:18,269 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 672 transitions. [2020-10-09 10:37:18,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:18,269 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 672 transitions. [2020-10-09 10:37:18,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:18,269 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:18,269 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:18,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-09 10:37:18,470 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:18,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:18,471 INFO L82 PathProgramCache]: Analyzing trace with hash 2095010956, now seen corresponding path program 118 times [2020-10-09 10:37:18,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:18,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284448112] [2020-10-09 10:37:18,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:18,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:18,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284448112] [2020-10-09 10:37:18,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298529811] [2020-10-09 10:37:18,576 INFO L93 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:18,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:37:18,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:18,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:18,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:19,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:19,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:19,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:19,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907161182] [2020-10-09 10:37:19,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:19,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:19,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:19,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:19,022 INFO L87 Difference]: Start difference. First operand 256 states and 672 transitions. Second operand 17 states. [2020-10-09 10:37:19,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:19,508 INFO L93 Difference]: Finished difference Result 331 states and 819 transitions. [2020-10-09 10:37:19,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 10:37:19,509 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:19,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:19,511 INFO L225 Difference]: With dead ends: 331 [2020-10-09 10:37:19,511 INFO L226 Difference]: Without dead ends: 327 [2020-10-09 10:37:19,511 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:37:19,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-09 10:37:19,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 256. [2020-10-09 10:37:19,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-09 10:37:19,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 672 transitions. [2020-10-09 10:37:19,518 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 672 transitions. Word has length 14 [2020-10-09 10:37:19,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:19,519 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 672 transitions. [2020-10-09 10:37:19,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:19,519 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 672 transitions. [2020-10-09 10:37:19,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:19,520 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:19,520 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:19,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-09 10:37:19,735 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:19,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:19,736 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 119 times [2020-10-09 10:37:19,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:19,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189820394] [2020-10-09 10:37:19,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:19,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:19,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189820394] [2020-10-09 10:37:19,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029334105] [2020-10-09 10:37:19,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-10-09 10:37:19,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:37:19,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:19,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:19,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:20,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:20,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:20,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444903745] [2020-10-09 10:37:20,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:20,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:20,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:20,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:20,149 INFO L87 Difference]: Start difference. First operand 256 states and 672 transitions. Second operand 17 states. [2020-10-09 10:37:20,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:20,448 INFO L93 Difference]: Finished difference Result 321 states and 792 transitions. [2020-10-09 10:37:20,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:37:20,449 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:20,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:20,450 INFO L225 Difference]: With dead ends: 321 [2020-10-09 10:37:20,450 INFO L226 Difference]: Without dead ends: 318 [2020-10-09 10:37:20,451 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:37:20,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-09 10:37:20,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 259. [2020-10-09 10:37:20,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-09 10:37:20,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 681 transitions. [2020-10-09 10:37:20,455 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 681 transitions. Word has length 14 [2020-10-09 10:37:20,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:20,456 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 681 transitions. [2020-10-09 10:37:20,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:20,456 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 681 transitions. [2020-10-09 10:37:20,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:20,456 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:20,456 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:20,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-09 10:37:20,666 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:20,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:20,667 INFO L82 PathProgramCache]: Analyzing trace with hash 2122687756, now seen corresponding path program 120 times [2020-10-09 10:37:20,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:20,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402931987] [2020-10-09 10:37:20,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:20,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:20,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402931987] [2020-10-09 10:37:20,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822602232] [2020-10-09 10:37:20,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-10-09 10:37:20,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:37:20,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:20,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:20,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:20,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:20,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:20,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:20,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466153934] [2020-10-09 10:37:20,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:20,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:20,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:20,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:20,975 INFO L87 Difference]: Start difference. First operand 259 states and 681 transitions. Second operand 17 states. [2020-10-09 10:37:21,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:21,306 INFO L93 Difference]: Finished difference Result 348 states and 857 transitions. [2020-10-09 10:37:21,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:37:21,307 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:21,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:21,307 INFO L225 Difference]: With dead ends: 348 [2020-10-09 10:37:21,307 INFO L226 Difference]: Without dead ends: 343 [2020-10-09 10:37:21,308 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:37:21,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-09 10:37:21,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 260. [2020-10-09 10:37:21,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-09 10:37:21,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 684 transitions. [2020-10-09 10:37:21,311 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 684 transitions. Word has length 14 [2020-10-09 10:37:21,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:21,311 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 684 transitions. [2020-10-09 10:37:21,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:21,311 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 684 transitions. [2020-10-09 10:37:21,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:21,311 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:21,312 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:21,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-09 10:37:21,512 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:21,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:21,513 INFO L82 PathProgramCache]: Analyzing trace with hash 2122716586, now seen corresponding path program 121 times [2020-10-09 10:37:21,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:21,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038446618] [2020-10-09 10:37:21,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:21,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:21,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:21,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038446618] [2020-10-09 10:37:21,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810788069] [2020-10-09 10:37:21,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-10-09 10:37:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:21,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:21,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:21,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:21,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:21,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25876784] [2020-10-09 10:37:21,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:21,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:21,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:21,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:21,819 INFO L87 Difference]: Start difference. First operand 260 states and 684 transitions. Second operand 17 states. [2020-10-09 10:37:22,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:22,108 INFO L93 Difference]: Finished difference Result 349 states and 864 transitions. [2020-10-09 10:37:22,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:37:22,109 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:22,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:22,109 INFO L225 Difference]: With dead ends: 349 [2020-10-09 10:37:22,109 INFO L226 Difference]: Without dead ends: 344 [2020-10-09 10:37:22,109 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:37:22,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-09 10:37:22,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 259. [2020-10-09 10:37:22,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-09 10:37:22,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 681 transitions. [2020-10-09 10:37:22,113 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 681 transitions. Word has length 14 [2020-10-09 10:37:22,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:22,114 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 681 transitions. [2020-10-09 10:37:22,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:22,114 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 681 transitions. [2020-10-09 10:37:22,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:22,114 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:22,114 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:22,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-10-09 10:37:22,315 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:22,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:22,316 INFO L82 PathProgramCache]: Analyzing trace with hash 2123641068, now seen corresponding path program 122 times [2020-10-09 10:37:22,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:22,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513068523] [2020-10-09 10:37:22,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:22,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513068523] [2020-10-09 10:37:22,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288034060] [2020-10-09 10:37:22,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-10-09 10:37:22,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:37:22,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:22,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:22,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:22,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:22,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:22,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593874435] [2020-10-09 10:37:22,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:22,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:22,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:22,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:22,597 INFO L87 Difference]: Start difference. First operand 259 states and 681 transitions. Second operand 17 states. [2020-10-09 10:37:22,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:22,859 INFO L93 Difference]: Finished difference Result 332 states and 822 transitions. [2020-10-09 10:37:22,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:37:22,860 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:22,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:22,861 INFO L225 Difference]: With dead ends: 332 [2020-10-09 10:37:22,861 INFO L226 Difference]: Without dead ends: 314 [2020-10-09 10:37:22,861 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:37:22,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-09 10:37:22,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 260. [2020-10-09 10:37:22,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-09 10:37:22,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 677 transitions. [2020-10-09 10:37:22,865 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 677 transitions. Word has length 14 [2020-10-09 10:37:22,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:22,865 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 677 transitions. [2020-10-09 10:37:22,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:22,865 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 677 transitions. [2020-10-09 10:37:22,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:22,865 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:22,865 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:23,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:23,066 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:23,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:23,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 123 times [2020-10-09 10:37:23,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:23,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236132312] [2020-10-09 10:37:23,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:23,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:23,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:23,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236132312] [2020-10-09 10:37:23,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941965785] [2020-10-09 10:37:23,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-10-09 10:37:23,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-09 10:37:23,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:23,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:23,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:23,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:23,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:23,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:23,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036138459] [2020-10-09 10:37:23,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:23,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:23,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:23,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:23,369 INFO L87 Difference]: Start difference. First operand 260 states and 677 transitions. Second operand 17 states. [2020-10-09 10:37:23,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:23,643 INFO L93 Difference]: Finished difference Result 315 states and 779 transitions. [2020-10-09 10:37:23,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:37:23,643 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:23,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:23,644 INFO L225 Difference]: With dead ends: 315 [2020-10-09 10:37:23,644 INFO L226 Difference]: Without dead ends: 312 [2020-10-09 10:37:23,645 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:37:23,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-09 10:37:23,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 265. [2020-10-09 10:37:23,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-09 10:37:23,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 690 transitions. [2020-10-09 10:37:23,649 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 690 transitions. Word has length 14 [2020-10-09 10:37:23,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:23,649 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 690 transitions. [2020-10-09 10:37:23,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:23,650 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 690 transitions. [2020-10-09 10:37:23,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:23,650 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:23,650 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:23,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:23,851 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:23,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:23,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405010, now seen corresponding path program 124 times [2020-10-09 10:37:23,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:23,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489576794] [2020-10-09 10:37:23,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:23,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489576794] [2020-10-09 10:37:23,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725675001] [2020-10-09 10:37:23,961 INFO L93 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:23,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:37:23,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:23,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:23,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:24,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:24,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:24,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733417447] [2020-10-09 10:37:24,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:24,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:24,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:24,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:24,153 INFO L87 Difference]: Start difference. First operand 265 states and 690 transitions. Second operand 17 states. [2020-10-09 10:37:24,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:24,426 INFO L93 Difference]: Finished difference Result 334 states and 821 transitions. [2020-10-09 10:37:24,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 10:37:24,427 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:24,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:24,428 INFO L225 Difference]: With dead ends: 334 [2020-10-09 10:37:24,428 INFO L226 Difference]: Without dead ends: 330 [2020-10-09 10:37:24,428 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:37:24,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-09 10:37:24,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-10-09 10:37:24,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-09 10:37:24,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 687 transitions. [2020-10-09 10:37:24,432 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 687 transitions. Word has length 14 [2020-10-09 10:37:24,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:24,432 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 687 transitions. [2020-10-09 10:37:24,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:24,432 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 687 transitions. [2020-10-09 10:37:24,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:24,433 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:24,433 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:24,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:24,634 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:24,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:24,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1313376180, now seen corresponding path program 125 times [2020-10-09 10:37:24,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:24,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979093933] [2020-10-09 10:37:24,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:24,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:24,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979093933] [2020-10-09 10:37:24,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212300785] [2020-10-09 10:37:24,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-10-09 10:37:24,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:37:24,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:24,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:24,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:25,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:25,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:25,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:25,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907429493] [2020-10-09 10:37:25,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:25,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:25,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:25,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:25,056 INFO L87 Difference]: Start difference. First operand 264 states and 687 transitions. Second operand 17 states. [2020-10-09 10:37:25,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:25,409 INFO L93 Difference]: Finished difference Result 351 states and 859 transitions. [2020-10-09 10:37:25,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:37:25,409 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:25,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:25,410 INFO L225 Difference]: With dead ends: 351 [2020-10-09 10:37:25,410 INFO L226 Difference]: Without dead ends: 346 [2020-10-09 10:37:25,411 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:37:25,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-09 10:37:25,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 269. [2020-10-09 10:37:25,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-09 10:37:25,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 700 transitions. [2020-10-09 10:37:25,415 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 700 transitions. Word has length 14 [2020-10-09 10:37:25,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:25,415 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 700 transitions. [2020-10-09 10:37:25,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:25,415 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 700 transitions. [2020-10-09 10:37:25,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:25,416 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:25,416 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:25,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:25,617 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:25,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:25,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1312481489, now seen corresponding path program 126 times [2020-10-09 10:37:25,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:25,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989352034] [2020-10-09 10:37:25,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:25,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:25,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989352034] [2020-10-09 10:37:25,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195717339] [2020-10-09 10:37:25,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-10-09 10:37:25,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:37:25,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:25,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:25,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:25,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:25,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:25,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:25,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249530171] [2020-10-09 10:37:25,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:25,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:25,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:25,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:25,905 INFO L87 Difference]: Start difference. First operand 269 states and 700 transitions. Second operand 17 states. [2020-10-09 10:37:26,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:26,186 INFO L93 Difference]: Finished difference Result 357 states and 870 transitions. [2020-10-09 10:37:26,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:37:26,187 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:26,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:26,188 INFO L225 Difference]: With dead ends: 357 [2020-10-09 10:37:26,188 INFO L226 Difference]: Without dead ends: 339 [2020-10-09 10:37:26,188 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:37:26,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-10-09 10:37:26,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 269. [2020-10-09 10:37:26,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-09 10:37:26,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 696 transitions. [2020-10-09 10:37:26,192 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 696 transitions. Word has length 14 [2020-10-09 10:37:26,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:26,192 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 696 transitions. [2020-10-09 10:37:26,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:26,193 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 696 transitions. [2020-10-09 10:37:26,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:26,193 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:26,193 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:26,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:26,394 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:26,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:26,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1284776820, now seen corresponding path program 127 times [2020-10-09 10:37:26,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:26,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451595725] [2020-10-09 10:37:26,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:26,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451595725] [2020-10-09 10:37:26,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603475016] [2020-10-09 10:37:26,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-10-09 10:37:26,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:26,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:26,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:26,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:26,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:26,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143719012] [2020-10-09 10:37:26,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:26,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:26,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:26,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:26,731 INFO L87 Difference]: Start difference. First operand 269 states and 696 transitions. Second operand 17 states. [2020-10-09 10:37:27,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:27,011 INFO L93 Difference]: Finished difference Result 332 states and 820 transitions. [2020-10-09 10:37:27,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:37:27,012 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:27,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:27,013 INFO L225 Difference]: With dead ends: 332 [2020-10-09 10:37:27,013 INFO L226 Difference]: Without dead ends: 327 [2020-10-09 10:37:27,013 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:37:27,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-09 10:37:27,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 266. [2020-10-09 10:37:27,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-09 10:37:27,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 689 transitions. [2020-10-09 10:37:27,017 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 689 transitions. Word has length 14 [2020-10-09 10:37:27,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:27,017 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 689 transitions. [2020-10-09 10:37:27,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:27,017 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 689 transitions. [2020-10-09 10:37:27,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:27,018 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:27,018 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:27,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-09 10:37:27,219 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:27,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:27,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1283823508, now seen corresponding path program 128 times [2020-10-09 10:37:27,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:27,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136950336] [2020-10-09 10:37:27,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:27,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136950336] [2020-10-09 10:37:27,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893954519] [2020-10-09 10:37:27,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-10-09 10:37:27,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:37:27,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:27,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:27,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:27,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:27,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:27,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828943705] [2020-10-09 10:37:27,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:27,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:27,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:27,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:27,564 INFO L87 Difference]: Start difference. First operand 266 states and 689 transitions. Second operand 17 states. [2020-10-09 10:37:27,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:27,739 INFO L93 Difference]: Finished difference Result 322 states and 792 transitions. [2020-10-09 10:37:27,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:37:27,740 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:27,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:27,741 INFO L225 Difference]: With dead ends: 322 [2020-10-09 10:37:27,741 INFO L226 Difference]: Without dead ends: 309 [2020-10-09 10:37:27,741 INFO L673 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 [2020-10-09 10:37:27,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-09 10:37:27,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 268. [2020-10-09 10:37:27,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-09 10:37:27,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 691 transitions. [2020-10-09 10:37:27,746 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 691 transitions. Word has length 14 [2020-10-09 10:37:27,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:27,746 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 691 transitions. [2020-10-09 10:37:27,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:27,746 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 691 transitions. [2020-10-09 10:37:27,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:27,746 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:27,747 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:27,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-09 10:37:27,947 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:27,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:27,948 INFO L82 PathProgramCache]: Analyzing trace with hash 291274206, now seen corresponding path program 129 times [2020-10-09 10:37:27,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:27,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908788921] [2020-10-09 10:37:27,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:28,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:28,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908788921] [2020-10-09 10:37:28,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425417416] [2020-10-09 10:37:28,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-10-09 10:37:28,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:37:28,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:28,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:28,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:28,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:28,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:28,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447112950] [2020-10-09 10:37:28,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:28,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:28,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:28,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:28,305 INFO L87 Difference]: Start difference. First operand 268 states and 691 transitions. Second operand 17 states. [2020-10-09 10:37:28,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:28,384 INFO L93 Difference]: Finished difference Result 305 states and 753 transitions. [2020-10-09 10:37:28,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:37:28,385 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:28,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:28,386 INFO L225 Difference]: With dead ends: 305 [2020-10-09 10:37:28,386 INFO L226 Difference]: Without dead ends: 303 [2020-10-09 10:37:28,386 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-09 10:37:28,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-09 10:37:28,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 274. [2020-10-09 10:37:28,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-09 10:37:28,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 709 transitions. [2020-10-09 10:37:28,391 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 709 transitions. Word has length 14 [2020-10-09 10:37:28,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:28,391 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 709 transitions. [2020-10-09 10:37:28,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:28,391 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 709 transitions. [2020-10-09 10:37:28,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:28,392 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:28,392 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:28,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-09 10:37:28,600 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:28,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:28,600 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 130 times [2020-10-09 10:37:28,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:28,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724849570] [2020-10-09 10:37:28,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:28,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:28,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724849570] [2020-10-09 10:37:28,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574038873] [2020-10-09 10:37:28,742 INFO L93 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:28,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:37:28,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:28,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:28,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:28,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:28,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:28,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564793032] [2020-10-09 10:37:28,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:28,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:28,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:28,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:28,945 INFO L87 Difference]: Start difference. First operand 274 states and 709 transitions. Second operand 17 states. [2020-10-09 10:37:29,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:29,186 INFO L93 Difference]: Finished difference Result 325 states and 802 transitions. [2020-10-09 10:37:29,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:37:29,187 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:29,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:29,187 INFO L225 Difference]: With dead ends: 325 [2020-10-09 10:37:29,187 INFO L226 Difference]: Without dead ends: 322 [2020-10-09 10:37:29,188 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:37:29,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-09 10:37:29,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 272. [2020-10-09 10:37:29,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-09 10:37:29,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-09 10:37:29,192 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-09 10:37:29,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:29,192 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-09 10:37:29,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:29,192 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-09 10:37:29,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:29,192 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:29,193 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:29,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-09 10:37:29,393 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:29,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:29,394 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 131 times [2020-10-09 10:37:29,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:29,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687181892] [2020-10-09 10:37:29,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:29,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687181892] [2020-10-09 10:37:29,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637161016] [2020-10-09 10:37:29,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-10-09 10:37:29,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:37:29,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:29,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:29,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:29,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:29,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:29,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290115058] [2020-10-09 10:37:29,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:29,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:29,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:29,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:29,827 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-09 10:37:30,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:30,136 INFO L93 Difference]: Finished difference Result 348 states and 857 transitions. [2020-10-09 10:37:30,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:37:30,137 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:30,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:30,137 INFO L225 Difference]: With dead ends: 348 [2020-10-09 10:37:30,137 INFO L226 Difference]: Without dead ends: 344 [2020-10-09 10:37:30,137 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:37:30,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-09 10:37:30,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 270. [2020-10-09 10:37:30,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-09 10:37:30,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 697 transitions. [2020-10-09 10:37:30,141 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 697 transitions. Word has length 14 [2020-10-09 10:37:30,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:30,141 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 697 transitions. [2020-10-09 10:37:30,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:30,141 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 697 transitions. [2020-10-09 10:37:30,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:30,141 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:30,142 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:30,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:30,342 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:30,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:30,343 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 132 times [2020-10-09 10:37:30,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:30,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68523490] [2020-10-09 10:37:30,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:30,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:30,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68523490] [2020-10-09 10:37:30,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499150512] [2020-10-09 10:37:30,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-10-09 10:37:30,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:37:30,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:30,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:30,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:32,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:32,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:32,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281282684] [2020-10-09 10:37:32,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:32,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:32,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:32,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:32,676 INFO L87 Difference]: Start difference. First operand 270 states and 697 transitions. Second operand 17 states. [2020-10-09 10:37:33,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:33,049 INFO L93 Difference]: Finished difference Result 338 states and 827 transitions. [2020-10-09 10:37:33,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:37:33,050 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:33,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:33,050 INFO L225 Difference]: With dead ends: 338 [2020-10-09 10:37:33,051 INFO L226 Difference]: Without dead ends: 335 [2020-10-09 10:37:33,051 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:37:33,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-09 10:37:33,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 272. [2020-10-09 10:37:33,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-09 10:37:33,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-09 10:37:33,056 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-09 10:37:33,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:33,056 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-09 10:37:33,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:33,056 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-09 10:37:33,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:33,057 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:33,057 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:33,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:33,266 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:33,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:33,267 INFO L82 PathProgramCache]: Analyzing trace with hash 292198688, now seen corresponding path program 133 times [2020-10-09 10:37:33,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:33,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928599382] [2020-10-09 10:37:33,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:33,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:33,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928599382] [2020-10-09 10:37:33,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261953906] [2020-10-09 10:37:33,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-10-09 10:37:33,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:33,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:33,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:36,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:36,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:36,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:36,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022359289] [2020-10-09 10:37:36,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:36,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:36,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:36,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-10-09 10:37:36,785 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-09 10:37:41,020 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-09 10:37:43,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:43,377 INFO L93 Difference]: Finished difference Result 369 states and 902 transitions. [2020-10-09 10:37:43,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:37:43,378 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:43,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:43,379 INFO L225 Difference]: With dead ends: 369 [2020-10-09 10:37:43,379 INFO L226 Difference]: Without dead ends: 364 [2020-10-09 10:37:43,379 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=205, Invalid=443, Unknown=2, NotChecked=0, Total=650 [2020-10-09 10:37:43,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-10-09 10:37:43,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 272. [2020-10-09 10:37:43,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-09 10:37:43,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-09 10:37:43,383 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-09 10:37:43,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:43,383 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-09 10:37:43,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:43,384 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-09 10:37:43,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:43,384 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:43,384 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:43,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-10-09 10:37:43,585 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:43,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:43,586 INFO L82 PathProgramCache]: Analyzing trace with hash 292227518, now seen corresponding path program 134 times [2020-10-09 10:37:43,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:43,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869462324] [2020-10-09 10:37:43,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:43,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:43,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869462324] [2020-10-09 10:37:43,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396589603] [2020-10-09 10:37:43,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-10-09 10:37:43,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:37:43,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:43,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:43,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:43,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:43,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:43,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625364585] [2020-10-09 10:37:43,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:43,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:43,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:43,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:43,968 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-09 10:37:44,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:44,376 INFO L93 Difference]: Finished difference Result 352 states and 862 transitions. [2020-10-09 10:37:44,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:37:44,377 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:44,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:44,377 INFO L225 Difference]: With dead ends: 352 [2020-10-09 10:37:44,378 INFO L226 Difference]: Without dead ends: 348 [2020-10-09 10:37:44,378 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:37:44,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-09 10:37:44,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 268. [2020-10-09 10:37:44,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-09 10:37:44,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 691 transitions. [2020-10-09 10:37:44,381 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 691 transitions. Word has length 14 [2020-10-09 10:37:44,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:44,381 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 691 transitions. [2020-10-09 10:37:44,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:44,381 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 691 transitions. [2020-10-09 10:37:44,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:44,382 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:44,382 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:44,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:44,583 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:44,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:44,583 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 135 times [2020-10-09 10:37:44,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:44,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978234602] [2020-10-09 10:37:44,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:44,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978234602] [2020-10-09 10:37:44,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489279600] [2020-10-09 10:37:44,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-10-09 10:37:44,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:37:44,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:44,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:44,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:44,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:44,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:44,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:44,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065013634] [2020-10-09 10:37:44,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:44,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:44,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:44,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:44,899 INFO L87 Difference]: Start difference. First operand 268 states and 691 transitions. Second operand 17 states. [2020-10-09 10:37:45,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:45,297 INFO L93 Difference]: Finished difference Result 330 states and 806 transitions. [2020-10-09 10:37:45,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:37:45,298 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:45,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:45,298 INFO L225 Difference]: With dead ends: 330 [2020-10-09 10:37:45,299 INFO L226 Difference]: Without dead ends: 327 [2020-10-09 10:37:45,299 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:37:45,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-09 10:37:45,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 271. [2020-10-09 10:37:45,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-09 10:37:45,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 700 transitions. [2020-10-09 10:37:45,303 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 700 transitions. Word has length 14 [2020-10-09 10:37:45,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:45,303 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 700 transitions. [2020-10-09 10:37:45,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:45,303 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 700 transitions. [2020-10-09 10:37:45,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:45,303 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:45,304 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:45,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:45,504 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:45,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:45,505 INFO L82 PathProgramCache]: Analyzing trace with hash 319904318, now seen corresponding path program 136 times [2020-10-09 10:37:45,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:45,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428679396] [2020-10-09 10:37:45,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:45,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:45,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:45,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428679396] [2020-10-09 10:37:45,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194850309] [2020-10-09 10:37:45,610 INFO L93 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:45,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:37:45,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:45,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:45,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:45,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:45,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:45,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225018002] [2020-10-09 10:37:45,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:45,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:45,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:45,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:45,819 INFO L87 Difference]: Start difference. First operand 271 states and 700 transitions. Second operand 17 states. [2020-10-09 10:37:46,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:46,252 INFO L93 Difference]: Finished difference Result 365 states and 887 transitions. [2020-10-09 10:37:46,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:37:46,253 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:46,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:46,254 INFO L225 Difference]: With dead ends: 365 [2020-10-09 10:37:46,254 INFO L226 Difference]: Without dead ends: 360 [2020-10-09 10:37:46,254 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:37:46,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-10-09 10:37:46,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 272. [2020-10-09 10:37:46,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-09 10:37:46,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-09 10:37:46,260 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-09 10:37:46,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:46,260 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-09 10:37:46,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:46,260 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-09 10:37:46,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:46,260 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:46,260 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:46,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:46,461 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:46,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:46,462 INFO L82 PathProgramCache]: Analyzing trace with hash 319933148, now seen corresponding path program 137 times [2020-10-09 10:37:46,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:46,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856797712] [2020-10-09 10:37:46,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:46,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856797712] [2020-10-09 10:37:46,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327259860] [2020-10-09 10:37:46,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-10-09 10:37:46,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:37:46,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:46,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:46,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:46,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:46,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:46,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937347197] [2020-10-09 10:37:46,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:46,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:46,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:46,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:46,756 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-09 10:37:47,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:47,101 INFO L93 Difference]: Finished difference Result 363 states and 882 transitions. [2020-10-09 10:37:47,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:37:47,102 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:47,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:47,102 INFO L225 Difference]: With dead ends: 363 [2020-10-09 10:37:47,103 INFO L226 Difference]: Without dead ends: 358 [2020-10-09 10:37:47,103 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:37:47,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-09 10:37:47,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 271. [2020-10-09 10:37:47,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-09 10:37:47,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 700 transitions. [2020-10-09 10:37:47,111 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 700 transitions. Word has length 14 [2020-10-09 10:37:47,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:47,112 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 700 transitions. [2020-10-09 10:37:47,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:47,112 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 700 transitions. [2020-10-09 10:37:47,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:47,112 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:47,112 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:47,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-10-09 10:37:47,315 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:47,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:47,317 INFO L82 PathProgramCache]: Analyzing trace with hash 320857630, now seen corresponding path program 138 times [2020-10-09 10:37:47,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:47,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679096692] [2020-10-09 10:37:47,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:47,415 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:47,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679096692] [2020-10-09 10:37:47,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30334840] [2020-10-09 10:37:47,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-10-09 10:37:47,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:37:47,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:47,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:47,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:47,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:47,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:47,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:47,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727540438] [2020-10-09 10:37:47,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:47,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:47,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:47,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:47,607 INFO L87 Difference]: Start difference. First operand 271 states and 700 transitions. Second operand 17 states. [2020-10-09 10:37:47,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:47,895 INFO L93 Difference]: Finished difference Result 333 states and 812 transitions. [2020-10-09 10:37:47,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:37:47,896 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:47,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:47,896 INFO L225 Difference]: With dead ends: 333 [2020-10-09 10:37:47,896 INFO L226 Difference]: Without dead ends: 315 [2020-10-09 10:37:47,896 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:37:47,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-09 10:37:47,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 266. [2020-10-09 10:37:47,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-09 10:37:47,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-10-09 10:37:47,900 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-10-09 10:37:47,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:47,901 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-10-09 10:37:47,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:47,901 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-10-09 10:37:47,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:47,901 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:47,901 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:48,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-09 10:37:48,102 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:48,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:48,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1429448084, now seen corresponding path program 139 times [2020-10-09 10:37:48,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:48,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213998513] [2020-10-09 10:37:48,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:48,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:48,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213998513] [2020-10-09 10:37:48,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638450935] [2020-10-09 10:37:48,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-10-09 10:37:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:48,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:48,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:48,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:48,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:48,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218766172] [2020-10-09 10:37:48,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:48,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:48,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:48,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:48,554 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 17 states. [2020-10-09 10:37:48,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:48,671 INFO L93 Difference]: Finished difference Result 296 states and 732 transitions. [2020-10-09 10:37:48,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:37:48,672 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:48,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:48,672 INFO L225 Difference]: With dead ends: 296 [2020-10-09 10:37:48,672 INFO L226 Difference]: Without dead ends: 294 [2020-10-09 10:37:48,673 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:37:48,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-09 10:37:48,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 270. [2020-10-09 10:37:48,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-09 10:37:48,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 695 transitions. [2020-10-09 10:37:48,677 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 695 transitions. Word has length 14 [2020-10-09 10:37:48,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:48,677 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 695 transitions. [2020-10-09 10:37:48,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:48,677 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 695 transitions. [2020-10-09 10:37:48,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:48,678 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:48,678 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:48,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-09 10:37:48,887 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:48,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:48,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 140 times [2020-10-09 10:37:48,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:48,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277316686] [2020-10-09 10:37:48,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:48,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:49,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277316686] [2020-10-09 10:37:49,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801985908] [2020-10-09 10:37:49,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-10-09 10:37:49,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:37:49,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:49,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:49,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:49,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:49,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:49,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181167930] [2020-10-09 10:37:49,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:49,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:49,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:49,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:49,232 INFO L87 Difference]: Start difference. First operand 270 states and 695 transitions. Second operand 17 states. [2020-10-09 10:37:49,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:49,495 INFO L93 Difference]: Finished difference Result 328 states and 803 transitions. [2020-10-09 10:37:49,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:37:49,496 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:49,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:49,496 INFO L225 Difference]: With dead ends: 328 [2020-10-09 10:37:49,496 INFO L226 Difference]: Without dead ends: 325 [2020-10-09 10:37:49,497 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:37:49,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-09 10:37:49,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 268. [2020-10-09 10:37:49,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-09 10:37:49,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-10-09 10:37:49,501 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-10-09 10:37:49,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:49,501 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-10-09 10:37:49,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:49,502 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-10-09 10:37:49,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:49,502 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:49,502 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:49,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-09 10:37:49,703 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:49,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:49,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 141 times [2020-10-09 10:37:49,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:49,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391870972] [2020-10-09 10:37:49,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:49,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391870972] [2020-10-09 10:37:49,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969683556] [2020-10-09 10:37:49,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-10-09 10:37:49,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:37:49,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:49,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:49,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:50,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:50,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:50,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112976059] [2020-10-09 10:37:50,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:50,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:50,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:50,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:50,164 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 17 states. [2020-10-09 10:37:50,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:50,653 INFO L93 Difference]: Finished difference Result 344 states and 841 transitions. [2020-10-09 10:37:50,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:37:50,654 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:50,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:50,655 INFO L225 Difference]: With dead ends: 344 [2020-10-09 10:37:50,655 INFO L226 Difference]: Without dead ends: 340 [2020-10-09 10:37:50,655 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:37:50,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-09 10:37:50,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 266. [2020-10-09 10:37:50,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-09 10:37:50,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-10-09 10:37:50,661 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-10-09 10:37:50,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:50,661 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-10-09 10:37:50,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:50,661 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-10-09 10:37:50,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:50,662 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:50,662 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:50,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-09 10:37:50,872 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:50,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:50,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 142 times [2020-10-09 10:37:50,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:50,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990203015] [2020-10-09 10:37:50,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:50,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990203015] [2020-10-09 10:37:50,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715945618] [2020-10-09 10:37:50,972 INFO L93 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:51,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:37:51,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:51,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:51,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:53,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:53,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:53,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116982870] [2020-10-09 10:37:53,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:53,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:53,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:53,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:37:53,247 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 17 states. [2020-10-09 10:37:53,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:53,667 INFO L93 Difference]: Finished difference Result 331 states and 805 transitions. [2020-10-09 10:37:53,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:37:53,668 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:37:53,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:53,669 INFO L225 Difference]: With dead ends: 331 [2020-10-09 10:37:53,669 INFO L226 Difference]: Without dead ends: 328 [2020-10-09 10:37:53,669 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:37:53,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-09 10:37:53,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 268. [2020-10-09 10:37:53,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-09 10:37:53,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-10-09 10:37:53,674 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-10-09 10:37:53,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:53,674 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-10-09 10:37:53,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:37:53,674 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-10-09 10:37:53,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:37:53,675 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:53,675 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:53,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-10-09 10:37:53,887 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:53,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:53,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1428523602, now seen corresponding path program 143 times [2020-10-09 10:37:53,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:53,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469861738] [2020-10-09 10:37:53,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:53,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:53,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469861738] [2020-10-09 10:37:53,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559342840] [2020-10-09 10:37:53,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-10-09 10:37:54,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:37:54,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:54,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:37:54,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:57,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:57,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:37:57,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412078757] [2020-10-09 10:37:57,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:37:57,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:57,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:37:57,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-10-09 10:37:57,442 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 17 states. [2020-10-09 10:38:01,704 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-09 10:38:02,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:02,015 INFO L93 Difference]: Finished difference Result 357 states and 866 transitions. [2020-10-09 10:38:02,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:38:02,015 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:02,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:02,016 INFO L225 Difference]: With dead ends: 357 [2020-10-09 10:38:02,016 INFO L226 Difference]: Without dead ends: 352 [2020-10-09 10:38:02,016 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=211, Invalid=490, Unknown=1, NotChecked=0, Total=702 [2020-10-09 10:38:02,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-09 10:38:02,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 268. [2020-10-09 10:38:02,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-09 10:38:02,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-10-09 10:38:02,020 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-10-09 10:38:02,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:02,020 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-10-09 10:38:02,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:02,020 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-10-09 10:38:02,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:02,020 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:02,020 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:02,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:02,221 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:02,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:02,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1428494772, now seen corresponding path program 144 times [2020-10-09 10:38:02,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:02,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89463919] [2020-10-09 10:38:02,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:02,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89463919] [2020-10-09 10:38:02,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602571560] [2020-10-09 10:38:02,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-10-09 10:38:02,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:38:02,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:02,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:02,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:02,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:02,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:02,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:02,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327715481] [2020-10-09 10:38:02,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:02,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:02,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:02,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:02,583 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 17 states. [2020-10-09 10:38:03,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:03,029 INFO L93 Difference]: Finished difference Result 339 states and 826 transitions. [2020-10-09 10:38:03,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:38:03,029 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:03,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:03,030 INFO L225 Difference]: With dead ends: 339 [2020-10-09 10:38:03,030 INFO L226 Difference]: Without dead ends: 335 [2020-10-09 10:38:03,030 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:38:03,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-09 10:38:03,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 264. [2020-10-09 10:38:03,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-09 10:38:03,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 677 transitions. [2020-10-09 10:38:03,035 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 677 transitions. Word has length 14 [2020-10-09 10:38:03,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:03,035 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 677 transitions. [2020-10-09 10:38:03,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:03,035 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 677 transitions. [2020-10-09 10:38:03,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:03,035 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:03,035 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:03,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:03,236 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:03,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:03,237 INFO L82 PathProgramCache]: Analyzing trace with hash -792218594, now seen corresponding path program 145 times [2020-10-09 10:38:03,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:03,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846014745] [2020-10-09 10:38:03,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:03,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:03,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846014745] [2020-10-09 10:38:03,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093371745] [2020-10-09 10:38:03,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-10-09 10:38:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:03,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:03,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:03,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:03,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:03,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929452668] [2020-10-09 10:38:03,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:03,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:03,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:03,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:03,575 INFO L87 Difference]: Start difference. First operand 264 states and 677 transitions. Second operand 17 states. [2020-10-09 10:38:03,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:03,700 INFO L93 Difference]: Finished difference Result 287 states and 713 transitions. [2020-10-09 10:38:03,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:38:03,701 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:03,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:03,702 INFO L225 Difference]: With dead ends: 287 [2020-10-09 10:38:03,702 INFO L226 Difference]: Without dead ends: 285 [2020-10-09 10:38:03,702 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-09 10:38:03,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-09 10:38:03,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 266. [2020-10-09 10:38:03,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-09 10:38:03,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-10-09 10:38:03,706 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-10-09 10:38:03,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:03,706 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-10-09 10:38:03,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:03,707 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-10-09 10:38:03,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:03,707 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:03,707 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:03,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:03,908 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:03,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:03,908 INFO L82 PathProgramCache]: Analyzing trace with hash -792217633, now seen corresponding path program 146 times [2020-10-09 10:38:03,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:03,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357173481] [2020-10-09 10:38:03,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:03,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:04,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357173481] [2020-10-09 10:38:04,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142517422] [2020-10-09 10:38:04,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-10-09 10:38:04,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:38:04,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:04,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:04,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:04,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:04,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:04,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:04,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689908491] [2020-10-09 10:38:04,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:04,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:04,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:04,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:04,232 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 17 states. [2020-10-09 10:38:04,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:04,538 INFO L93 Difference]: Finished difference Result 317 states and 778 transitions. [2020-10-09 10:38:04,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:38:04,538 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:04,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:04,539 INFO L225 Difference]: With dead ends: 317 [2020-10-09 10:38:04,539 INFO L226 Difference]: Without dead ends: 314 [2020-10-09 10:38:04,540 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:38:04,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-09 10:38:04,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 264. [2020-10-09 10:38:04,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-09 10:38:04,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 677 transitions. [2020-10-09 10:38:04,543 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 677 transitions. Word has length 14 [2020-10-09 10:38:04,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:04,543 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 677 transitions. [2020-10-09 10:38:04,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:04,544 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 677 transitions. [2020-10-09 10:38:04,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:04,544 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:04,544 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:04,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:04,745 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:04,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:04,745 INFO L82 PathProgramCache]: Analyzing trace with hash -792188803, now seen corresponding path program 147 times [2020-10-09 10:38:04,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:04,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186998073] [2020-10-09 10:38:04,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:04,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186998073] [2020-10-09 10:38:04,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538717382] [2020-10-09 10:38:04,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-10-09 10:38:04,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:38:04,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:04,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 10:38:04,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:04,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:04,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-10-09 10:38:04,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269433657] [2020-10-09 10:38:04,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-09 10:38:04,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:04,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-09 10:38:04,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-09 10:38:04,973 INFO L87 Difference]: Start difference. First operand 264 states and 677 transitions. Second operand 14 states. [2020-10-09 10:38:05,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:05,248 INFO L93 Difference]: Finished difference Result 337 states and 817 transitions. [2020-10-09 10:38:05,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:38:05,248 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2020-10-09 10:38:05,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:05,249 INFO L225 Difference]: With dead ends: 337 [2020-10-09 10:38:05,249 INFO L226 Difference]: Without dead ends: 330 [2020-10-09 10:38:05,250 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:38:05,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-09 10:38:05,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 262. [2020-10-09 10:38:05,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-09 10:38:05,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 671 transitions. [2020-10-09 10:38:05,254 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 671 transitions. Word has length 14 [2020-10-09 10:38:05,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:05,254 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 671 transitions. [2020-10-09 10:38:05,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-09 10:38:05,254 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 671 transitions. [2020-10-09 10:38:05,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:05,254 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:05,255 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:05,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:05,455 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:05,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:05,456 INFO L82 PathProgramCache]: Analyzing trace with hash -771662804, now seen corresponding path program 148 times [2020-10-09 10:38:05,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:05,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358529846] [2020-10-09 10:38:05,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:05,573 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:05,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358529846] [2020-10-09 10:38:05,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712559959] [2020-10-09 10:38:05,574 INFO L93 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:05,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:38:05,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:05,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:05,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:05,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:05,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:05,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711444696] [2020-10-09 10:38:05,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:05,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:05,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:05,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:05,789 INFO L87 Difference]: Start difference. First operand 262 states and 671 transitions. Second operand 17 states. [2020-10-09 10:38:05,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:05,947 INFO L93 Difference]: Finished difference Result 278 states and 694 transitions. [2020-10-09 10:38:05,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 10:38:05,948 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:05,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:05,948 INFO L225 Difference]: With dead ends: 278 [2020-10-09 10:38:05,949 INFO L226 Difference]: Without dead ends: 276 [2020-10-09 10:38:05,949 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:38:05,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-09 10:38:05,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 262. [2020-10-09 10:38:05,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-09 10:38:05,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 671 transitions. [2020-10-09 10:38:05,953 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 671 transitions. Word has length 14 [2020-10-09 10:38:05,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:05,953 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 671 transitions. [2020-10-09 10:38:05,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:05,953 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 671 transitions. [2020-10-09 10:38:05,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:05,953 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:05,953 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:06,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:06,154 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:06,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:06,155 INFO L82 PathProgramCache]: Analyzing trace with hash -771661843, now seen corresponding path program 149 times [2020-10-09 10:38:06,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:06,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212188662] [2020-10-09 10:38:06,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:06,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:06,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212188662] [2020-10-09 10:38:06,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892585126] [2020-10-09 10:38:06,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-10-09 10:38:06,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:38:06,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:06,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:06,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:06,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:06,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:06,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:06,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568503796] [2020-10-09 10:38:06,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:06,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:06,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:06,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:06,459 INFO L87 Difference]: Start difference. First operand 262 states and 671 transitions. Second operand 17 states. [2020-10-09 10:38:06,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:06,793 INFO L93 Difference]: Finished difference Result 306 states and 753 transitions. [2020-10-09 10:38:06,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:38:06,794 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:06,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:06,794 INFO L225 Difference]: With dead ends: 306 [2020-10-09 10:38:06,795 INFO L226 Difference]: Without dead ends: 303 [2020-10-09 10:38:06,795 INFO L673 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 [2020-10-09 10:38:06,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-09 10:38:06,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 260. [2020-10-09 10:38:06,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-09 10:38:06,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 665 transitions. [2020-10-09 10:38:06,799 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 665 transitions. Word has length 14 [2020-10-09 10:38:06,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:06,799 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 665 transitions. [2020-10-09 10:38:06,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:06,799 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 665 transitions. [2020-10-09 10:38:06,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:06,799 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:06,799 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:07,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-10-09 10:38:07,000 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:07,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:07,001 INFO L82 PathProgramCache]: Analyzing trace with hash -770999714, now seen corresponding path program 150 times [2020-10-09 10:38:07,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:07,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176844189] [2020-10-09 10:38:07,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:07,103 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:07,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176844189] [2020-10-09 10:38:07,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454111217] [2020-10-09 10:38:07,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-10-09 10:38:07,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:38:07,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:07,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 10:38:07,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:07,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:07,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-09 10:38:07,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325851500] [2020-10-09 10:38:07,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:38:07,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:07,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:38:07,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:38:07,185 INFO L87 Difference]: Start difference. First operand 260 states and 665 transitions. Second operand 11 states. [2020-10-09 10:38:07,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:07,336 INFO L93 Difference]: Finished difference Result 269 states and 677 transitions. [2020-10-09 10:38:07,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:38:07,337 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-09 10:38:07,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:07,337 INFO L225 Difference]: With dead ends: 269 [2020-10-09 10:38:07,338 INFO L226 Difference]: Without dead ends: 267 [2020-10-09 10:38:07,338 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-10-09 10:38:07,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-09 10:38:07,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 256. [2020-10-09 10:38:07,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-09 10:38:07,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 659 transitions. [2020-10-09 10:38:07,344 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 659 transitions. Word has length 14 [2020-10-09 10:38:07,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:07,344 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 659 transitions. [2020-10-09 10:38:07,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:38:07,344 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 659 transitions. [2020-10-09 10:38:07,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:07,345 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:07,345 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:07,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:07,553 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:07,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:07,554 INFO L82 PathProgramCache]: Analyzing trace with hash -770977394, now seen corresponding path program 151 times [2020-10-09 10:38:07,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:07,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071766900] [2020-10-09 10:38:07,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:07,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:07,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071766900] [2020-10-09 10:38:07,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496911733] [2020-10-09 10:38:07,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-10-09 10:38:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:07,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:07,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:07,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:38:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:07,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:07,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:07,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815035748] [2020-10-09 10:38:07,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:07,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:07,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:07,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:07,875 INFO L87 Difference]: Start difference. First operand 256 states and 659 transitions. Second operand 17 states. [2020-10-09 10:38:08,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:08,319 INFO L93 Difference]: Finished difference Result 298 states and 754 transitions. [2020-10-09 10:38:08,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:38:08,320 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:08,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:08,321 INFO L225 Difference]: With dead ends: 298 [2020-10-09 10:38:08,321 INFO L226 Difference]: Without dead ends: 294 [2020-10-09 10:38:08,321 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:38:08,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-09 10:38:08,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 257. [2020-10-09 10:38:08,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-09 10:38:08,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 662 transitions. [2020-10-09 10:38:08,324 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 662 transitions. Word has length 14 [2020-10-09 10:38:08,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:08,325 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 662 transitions. [2020-10-09 10:38:08,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:08,325 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 662 transitions. [2020-10-09 10:38:08,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:08,325 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:08,325 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:08,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-09 10:38:08,526 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:08,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:08,527 INFO L82 PathProgramCache]: Analyzing trace with hash -770969923, now seen corresponding path program 152 times [2020-10-09 10:38:08,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:08,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674733014] [2020-10-09 10:38:08,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:08,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:08,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674733014] [2020-10-09 10:38:08,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644658821] [2020-10-09 10:38:08,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-10-09 10:38:08,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:38:08,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:08,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:08,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:08,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:08,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:08,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239540690] [2020-10-09 10:38:08,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:08,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:08,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:08,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:08,851 INFO L87 Difference]: Start difference. First operand 257 states and 662 transitions. Second operand 17 states. [2020-10-09 10:38:09,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:09,240 INFO L93 Difference]: Finished difference Result 313 states and 786 transitions. [2020-10-09 10:38:09,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:38:09,241 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:09,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:09,241 INFO L225 Difference]: With dead ends: 313 [2020-10-09 10:38:09,242 INFO L226 Difference]: Without dead ends: 310 [2020-10-09 10:38:09,242 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:38:09,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-09 10:38:09,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 259. [2020-10-09 10:38:09,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-09 10:38:09,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 669 transitions. [2020-10-09 10:38:09,246 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 669 transitions. Word has length 14 [2020-10-09 10:38:09,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:09,246 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 669 transitions. [2020-10-09 10:38:09,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:09,246 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 669 transitions. [2020-10-09 10:38:09,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:09,246 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:09,246 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:09,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:09,447 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:09,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:09,448 INFO L82 PathProgramCache]: Analyzing trace with hash -770948564, now seen corresponding path program 153 times [2020-10-09 10:38:09,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:09,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664320623] [2020-10-09 10:38:09,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:09,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:09,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:09,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664320623] [2020-10-09 10:38:09,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453601945] [2020-10-09 10:38:09,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-10-09 10:38:09,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:38:09,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:09,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:38:09,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:09,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:38:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:09,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:09,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:09,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465382971] [2020-10-09 10:38:09,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:09,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:09,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:09,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:09,760 INFO L87 Difference]: Start difference. First operand 259 states and 669 transitions. Second operand 17 states. [2020-10-09 10:38:10,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:10,325 INFO L93 Difference]: Finished difference Result 314 states and 795 transitions. [2020-10-09 10:38:10,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:38:10,326 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:10,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:10,326 INFO L225 Difference]: With dead ends: 314 [2020-10-09 10:38:10,326 INFO L226 Difference]: Without dead ends: 309 [2020-10-09 10:38:10,327 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=273, Invalid=597, Unknown=0, NotChecked=0, Total=870 [2020-10-09 10:38:10,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-09 10:38:10,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 259. [2020-10-09 10:38:10,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-09 10:38:10,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 668 transitions. [2020-10-09 10:38:10,331 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 668 transitions. Word has length 14 [2020-10-09 10:38:10,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:10,331 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 668 transitions. [2020-10-09 10:38:10,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:10,331 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 668 transitions. [2020-10-09 10:38:10,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:10,331 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:10,331 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:10,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:10,534 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:10,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:10,535 INFO L82 PathProgramCache]: Analyzing trace with hash -770947603, now seen corresponding path program 154 times [2020-10-09 10:38:10,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:10,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199497631] [2020-10-09 10:38:10,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:10,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:10,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199497631] [2020-10-09 10:38:10,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713069983] [2020-10-09 10:38:10,628 INFO L93 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:10,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:38:10,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:10,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:10,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:10,823 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:38:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:10,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:10,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:10,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201983426] [2020-10-09 10:38:10,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:10,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:10,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:10,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:10,858 INFO L87 Difference]: Start difference. First operand 259 states and 668 transitions. Second operand 17 states. [2020-10-09 10:38:11,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:11,404 INFO L93 Difference]: Finished difference Result 333 states and 837 transitions. [2020-10-09 10:38:11,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:38:11,405 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:11,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:11,406 INFO L225 Difference]: With dead ends: 333 [2020-10-09 10:38:11,406 INFO L226 Difference]: Without dead ends: 328 [2020-10-09 10:38:11,406 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:38:11,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-09 10:38:11,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 259. [2020-10-09 10:38:11,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-09 10:38:11,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 671 transitions. [2020-10-09 10:38:11,411 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 671 transitions. Word has length 14 [2020-10-09 10:38:11,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:11,411 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 671 transitions. [2020-10-09 10:38:11,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:11,411 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 671 transitions. [2020-10-09 10:38:11,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:11,412 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:11,412 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:11,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2020-10-09 10:38:11,612 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:11,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:11,613 INFO L82 PathProgramCache]: Analyzing trace with hash -770739283, now seen corresponding path program 155 times [2020-10-09 10:38:11,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:11,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829675261] [2020-10-09 10:38:11,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:11,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:11,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829675261] [2020-10-09 10:38:11,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216892614] [2020-10-09 10:38:11,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-10-09 10:38:11,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:38:11,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:11,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:11,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:11,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:11,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:11,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:11,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468903729] [2020-10-09 10:38:11,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:11,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:11,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:11,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:11,997 INFO L87 Difference]: Start difference. First operand 259 states and 671 transitions. Second operand 17 states. [2020-10-09 10:38:12,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:12,409 INFO L93 Difference]: Finished difference Result 350 states and 873 transitions. [2020-10-09 10:38:12,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:38:12,410 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:12,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:12,411 INFO L225 Difference]: With dead ends: 350 [2020-10-09 10:38:12,411 INFO L226 Difference]: Without dead ends: 346 [2020-10-09 10:38:12,412 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:38:12,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-09 10:38:12,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 261. [2020-10-09 10:38:12,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-09 10:38:12,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 678 transitions. [2020-10-09 10:38:12,415 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 678 transitions. Word has length 14 [2020-10-09 10:38:12,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:12,415 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 678 transitions. [2020-10-09 10:38:12,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:12,415 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 678 transitions. [2020-10-09 10:38:12,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:12,416 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:12,416 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:12,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:12,616 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:12,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:12,617 INFO L82 PathProgramCache]: Analyzing trace with hash -770076193, now seen corresponding path program 156 times [2020-10-09 10:38:12,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:12,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430697449] [2020-10-09 10:38:12,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:12,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:12,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:12,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430697449] [2020-10-09 10:38:12,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158239304] [2020-10-09 10:38:12,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-10-09 10:38:12,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:38:12,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:12,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:12,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:12,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:12,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:12,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:12,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316442109] [2020-10-09 10:38:12,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:12,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:12,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:12,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:12,969 INFO L87 Difference]: Start difference. First operand 261 states and 678 transitions. Second operand 17 states. [2020-10-09 10:38:13,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:13,525 INFO L93 Difference]: Finished difference Result 362 states and 911 transitions. [2020-10-09 10:38:13,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:38:13,526 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:13,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:13,526 INFO L225 Difference]: With dead ends: 362 [2020-10-09 10:38:13,526 INFO L226 Difference]: Without dead ends: 358 [2020-10-09 10:38:13,526 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2020-10-09 10:38:13,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-09 10:38:13,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 265. [2020-10-09 10:38:13,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-09 10:38:13,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 692 transitions. [2020-10-09 10:38:13,531 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 692 transitions. Word has length 14 [2020-10-09 10:38:13,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:13,531 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 692 transitions. [2020-10-09 10:38:13,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:13,531 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 692 transitions. [2020-10-09 10:38:13,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:13,531 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:13,532 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:13,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:13,732 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:13,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:13,733 INFO L82 PathProgramCache]: Analyzing trace with hash -770054834, now seen corresponding path program 157 times [2020-10-09 10:38:13,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:13,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39895661] [2020-10-09 10:38:13,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:13,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39895661] [2020-10-09 10:38:13,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763783493] [2020-10-09 10:38:13,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-10-09 10:38:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:13,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:13,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:14,055 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:38:14,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:14,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:14,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:14,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444156471] [2020-10-09 10:38:14,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:14,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:14,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:14,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:14,096 INFO L87 Difference]: Start difference. First operand 265 states and 692 transitions. Second operand 17 states. [2020-10-09 10:38:14,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:14,794 INFO L93 Difference]: Finished difference Result 322 states and 822 transitions. [2020-10-09 10:38:14,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:38:14,795 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:14,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:14,796 INFO L225 Difference]: With dead ends: 322 [2020-10-09 10:38:14,796 INFO L226 Difference]: Without dead ends: 316 [2020-10-09 10:38:14,796 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=358, Invalid=698, Unknown=0, NotChecked=0, Total=1056 [2020-10-09 10:38:14,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-09 10:38:14,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 265. [2020-10-09 10:38:14,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-09 10:38:14,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 690 transitions. [2020-10-09 10:38:14,800 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 690 transitions. Word has length 14 [2020-10-09 10:38:14,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:14,800 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 690 transitions. [2020-10-09 10:38:14,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:14,800 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 690 transitions. [2020-10-09 10:38:14,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:14,801 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:14,801 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:15,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:15,002 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:15,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:15,002 INFO L82 PathProgramCache]: Analyzing trace with hash -770053873, now seen corresponding path program 158 times [2020-10-09 10:38:15,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:15,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762588] [2020-10-09 10:38:15,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:15,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762588] [2020-10-09 10:38:15,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43366878] [2020-10-09 10:38:15,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-10-09 10:38:15,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:38:15,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:15,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:15,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:17,359 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:38:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:17,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:17,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:17,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454096349] [2020-10-09 10:38:17,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:17,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:17,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:17,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=185, Unknown=1, NotChecked=0, Total=272 [2020-10-09 10:38:17,411 INFO L87 Difference]: Start difference. First operand 265 states and 690 transitions. Second operand 17 states. [2020-10-09 10:38:21,685 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-10-09 10:38:21,877 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-09 10:38:25,996 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-09 10:38:26,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:26,569 INFO L93 Difference]: Finished difference Result 395 states and 997 transitions. [2020-10-09 10:38:26,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 10:38:26,570 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:26,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:26,571 INFO L225 Difference]: With dead ends: 395 [2020-10-09 10:38:26,571 INFO L226 Difference]: Without dead ends: 386 [2020-10-09 10:38:26,571 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=370, Invalid=819, Unknown=1, NotChecked=0, Total=1190 [2020-10-09 10:38:26,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-10-09 10:38:26,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 262. [2020-10-09 10:38:26,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-09 10:38:26,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 685 transitions. [2020-10-09 10:38:26,576 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 685 transitions. Word has length 14 [2020-10-09 10:38:26,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:26,576 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 685 transitions. [2020-10-09 10:38:26,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:26,576 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 685 transitions. [2020-10-09 10:38:26,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:26,577 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:26,577 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:26,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:26,778 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:26,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:26,779 INFO L82 PathProgramCache]: Analyzing trace with hash -770025043, now seen corresponding path program 159 times [2020-10-09 10:38:26,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:26,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328558761] [2020-10-09 10:38:26,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:26,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:26,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:26,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328558761] [2020-10-09 10:38:26,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697120094] [2020-10-09 10:38:26,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-10-09 10:38:26,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:38:26,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:26,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:26,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:27,093 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:38:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:27,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:27,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:27,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569594886] [2020-10-09 10:38:27,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:27,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:27,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:27,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:27,125 INFO L87 Difference]: Start difference. First operand 262 states and 685 transitions. Second operand 17 states. [2020-10-09 10:38:27,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:27,804 INFO L93 Difference]: Finished difference Result 358 states and 909 transitions. [2020-10-09 10:38:27,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:38:27,805 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:27,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:27,806 INFO L225 Difference]: With dead ends: 358 [2020-10-09 10:38:27,806 INFO L226 Difference]: Without dead ends: 353 [2020-10-09 10:38:27,806 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=338, Invalid=718, Unknown=0, NotChecked=0, Total=1056 [2020-10-09 10:38:27,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-10-09 10:38:27,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 262. [2020-10-09 10:38:27,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-09 10:38:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 685 transitions. [2020-10-09 10:38:27,810 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 685 transitions. Word has length 14 [2020-10-09 10:38:27,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:27,810 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 685 transitions. [2020-10-09 10:38:27,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:27,810 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 685 transitions. [2020-10-09 10:38:27,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:27,811 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:27,811 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:28,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:28,012 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:28,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:28,012 INFO L82 PathProgramCache]: Analyzing trace with hash -763589443, now seen corresponding path program 160 times [2020-10-09 10:38:28,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:28,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675889095] [2020-10-09 10:38:28,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:28,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:28,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675889095] [2020-10-09 10:38:28,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753330855] [2020-10-09 10:38:28,106 INFO L93 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:28,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:38:28,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:28,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:28,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:28,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:28,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:28,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:28,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200909882] [2020-10-09 10:38:28,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:28,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:28,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:28,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:28,376 INFO L87 Difference]: Start difference. First operand 262 states and 685 transitions. Second operand 17 states. [2020-10-09 10:38:28,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:28,788 INFO L93 Difference]: Finished difference Result 350 states and 871 transitions. [2020-10-09 10:38:28,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:38:28,788 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:28,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:28,789 INFO L225 Difference]: With dead ends: 350 [2020-10-09 10:38:28,789 INFO L226 Difference]: Without dead ends: 347 [2020-10-09 10:38:28,789 INFO L673 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 [2020-10-09 10:38:28,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-09 10:38:28,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 265. [2020-10-09 10:38:28,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-09 10:38:28,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 696 transitions. [2020-10-09 10:38:28,793 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 696 transitions. Word has length 14 [2020-10-09 10:38:28,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:28,794 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 696 transitions. [2020-10-09 10:38:28,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:28,794 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 696 transitions. [2020-10-09 10:38:28,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:28,794 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:28,794 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:28,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:28,995 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:28,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:28,995 INFO L82 PathProgramCache]: Analyzing trace with hash -763588482, now seen corresponding path program 161 times [2020-10-09 10:38:28,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:28,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743733132] [2020-10-09 10:38:28,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:29,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:29,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743733132] [2020-10-09 10:38:29,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960182072] [2020-10-09 10:38:29,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:29,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:38:29,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:29,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:29,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:32,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:32,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:32,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568740054] [2020-10-09 10:38:32,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:32,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:32,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:32,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2020-10-09 10:38:32,121 INFO L87 Difference]: Start difference. First operand 265 states and 696 transitions. Second operand 17 states. [2020-10-09 10:38:36,416 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-09 10:38:42,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:42,811 INFO L93 Difference]: Finished difference Result 380 states and 945 transitions. [2020-10-09 10:38:42,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:38:42,811 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:42,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:42,812 INFO L225 Difference]: With dead ends: 380 [2020-10-09 10:38:42,812 INFO L226 Difference]: Without dead ends: 375 [2020-10-09 10:38:42,813 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=193, Invalid=508, Unknown=1, NotChecked=0, Total=702 [2020-10-09 10:38:42,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-10-09 10:38:42,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 266. [2020-10-09 10:38:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-09 10:38:42,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 698 transitions. [2020-10-09 10:38:42,817 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 698 transitions. Word has length 14 [2020-10-09 10:38:42,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:42,817 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 698 transitions. [2020-10-09 10:38:42,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:42,817 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 698 transitions. [2020-10-09 10:38:42,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:42,817 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:42,817 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:43,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-09 10:38:43,018 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:43,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:43,019 INFO L82 PathProgramCache]: Analyzing trace with hash -763559652, now seen corresponding path program 162 times [2020-10-09 10:38:43,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:43,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981446933] [2020-10-09 10:38:43,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:43,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:43,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981446933] [2020-10-09 10:38:43,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450080917] [2020-10-09 10:38:43,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:43,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:38:43,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:43,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:43,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:43,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:43,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:43,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254430633] [2020-10-09 10:38:43,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:43,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:43,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:43,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:43,405 INFO L87 Difference]: Start difference. First operand 266 states and 698 transitions. Second operand 17 states. [2020-10-09 10:38:43,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:43,860 INFO L93 Difference]: Finished difference Result 366 states and 912 transitions. [2020-10-09 10:38:43,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:38:43,861 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:43,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:43,861 INFO L225 Difference]: With dead ends: 366 [2020-10-09 10:38:43,861 INFO L226 Difference]: Without dead ends: 362 [2020-10-09 10:38:43,862 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:38:43,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-10-09 10:38:43,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 264. [2020-10-09 10:38:43,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-09 10:38:43,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 692 transitions. [2020-10-09 10:38:43,865 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 692 transitions. Word has length 14 [2020-10-09 10:38:43,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:43,866 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 692 transitions. [2020-10-09 10:38:43,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:43,866 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 692 transitions. [2020-10-09 10:38:43,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:43,866 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:43,866 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:44,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-10-09 10:38:44,068 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:44,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:44,068 INFO L82 PathProgramCache]: Analyzing trace with hash -743033653, now seen corresponding path program 163 times [2020-10-09 10:38:44,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:44,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795715175] [2020-10-09 10:38:44,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:44,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:44,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795715175] [2020-10-09 10:38:44,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67790854] [2020-10-09 10:38:44,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:44,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:44,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:45,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:45,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:45,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:45,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167584017] [2020-10-09 10:38:45,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:45,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:45,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:45,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:45,653 INFO L87 Difference]: Start difference. First operand 264 states and 692 transitions. Second operand 17 states. [2020-10-09 10:38:46,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:46,339 INFO L93 Difference]: Finished difference Result 357 states and 890 transitions. [2020-10-09 10:38:46,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 10:38:46,340 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:46,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:46,340 INFO L225 Difference]: With dead ends: 357 [2020-10-09 10:38:46,341 INFO L226 Difference]: Without dead ends: 354 [2020-10-09 10:38:46,341 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:38:46,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-10-09 10:38:46,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 266. [2020-10-09 10:38:46,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-09 10:38:46,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 700 transitions. [2020-10-09 10:38:46,346 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 700 transitions. Word has length 14 [2020-10-09 10:38:46,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:46,346 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 700 transitions. [2020-10-09 10:38:46,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:46,346 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 700 transitions. [2020-10-09 10:38:46,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:46,346 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:46,347 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:46,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2020-10-09 10:38:46,550 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:46,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:46,551 INFO L82 PathProgramCache]: Analyzing trace with hash -743032692, now seen corresponding path program 164 times [2020-10-09 10:38:46,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:46,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190396538] [2020-10-09 10:38:46,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:46,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:46,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190396538] [2020-10-09 10:38:46,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637440972] [2020-10-09 10:38:46,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:46,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:38:46,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:46,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:46,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:47,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:47,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:47,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:47,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683612554] [2020-10-09 10:38:47,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:47,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:47,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:47,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:47,588 INFO L87 Difference]: Start difference. First operand 266 states and 700 transitions. Second operand 17 states. [2020-10-09 10:38:51,971 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-09 10:39:06,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:06,664 INFO L93 Difference]: Finished difference Result 401 states and 995 transitions. [2020-10-09 10:39:06,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 10:39:06,665 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:06,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:06,666 INFO L225 Difference]: With dead ends: 401 [2020-10-09 10:39:06,666 INFO L226 Difference]: Without dead ends: 396 [2020-10-09 10:39:06,666 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=289, Invalid=699, Unknown=4, NotChecked=0, Total=992 [2020-10-09 10:39:06,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-10-09 10:39:06,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 269. [2020-10-09 10:39:06,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-09 10:39:06,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 709 transitions. [2020-10-09 10:39:06,670 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 709 transitions. Word has length 14 [2020-10-09 10:39:06,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:06,671 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 709 transitions. [2020-10-09 10:39:06,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:06,671 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 709 transitions. [2020-10-09 10:39:06,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:06,671 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:06,671 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:06,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:06,872 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:06,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:06,872 INFO L82 PathProgramCache]: Analyzing trace with hash -742370563, now seen corresponding path program 165 times [2020-10-09 10:39:06,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:06,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132177610] [2020-10-09 10:39:06,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:06,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132177610] [2020-10-09 10:39:06,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132487923] [2020-10-09 10:39:06,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:07,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:39:07,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:07,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:07,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:07,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:07,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:07,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:07,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736815301] [2020-10-09 10:39:07,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:07,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:07,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:07,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:07,236 INFO L87 Difference]: Start difference. First operand 269 states and 709 transitions. Second operand 17 states. [2020-10-09 10:39:07,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:07,930 INFO L93 Difference]: Finished difference Result 352 states and 890 transitions. [2020-10-09 10:39:07,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 10:39:07,931 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:07,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:07,932 INFO L225 Difference]: With dead ends: 352 [2020-10-09 10:39:07,932 INFO L226 Difference]: Without dead ends: 349 [2020-10-09 10:39:07,933 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:39:07,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-10-09 10:39:07,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 271. [2020-10-09 10:39:07,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-09 10:39:07,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 716 transitions. [2020-10-09 10:39:07,936 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 716 transitions. Word has length 14 [2020-10-09 10:39:07,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:07,936 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 716 transitions. [2020-10-09 10:39:07,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:07,937 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 716 transitions. [2020-10-09 10:39:07,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:07,937 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:07,937 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:08,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:08,138 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:08,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:08,138 INFO L82 PathProgramCache]: Analyzing trace with hash -742349204, now seen corresponding path program 166 times [2020-10-09 10:39:08,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:08,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235472809] [2020-10-09 10:39:08,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:08,237 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:08,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235472809] [2020-10-09 10:39:08,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325814963] [2020-10-09 10:39:08,237 INFO L93 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:08,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:39:08,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:08,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:08,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:08,457 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:39:08,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:08,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:08,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:08,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603375944] [2020-10-09 10:39:08,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:08,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:08,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:08,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:08,504 INFO L87 Difference]: Start difference. First operand 271 states and 716 transitions. Second operand 17 states. [2020-10-09 10:39:09,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:09,355 INFO L93 Difference]: Finished difference Result 323 states and 827 transitions. [2020-10-09 10:39:09,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:39:09,356 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:09,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:09,356 INFO L225 Difference]: With dead ends: 323 [2020-10-09 10:39:09,356 INFO L226 Difference]: Without dead ends: 316 [2020-10-09 10:39:09,356 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=394, Invalid=796, Unknown=0, NotChecked=0, Total=1190 [2020-10-09 10:39:09,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-09 10:39:09,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 271. [2020-10-09 10:39:09,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-09 10:39:09,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 713 transitions. [2020-10-09 10:39:09,361 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 713 transitions. Word has length 14 [2020-10-09 10:39:09,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:09,361 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 713 transitions. [2020-10-09 10:39:09,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:09,361 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 713 transitions. [2020-10-09 10:39:09,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:09,361 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:09,361 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:09,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2020-10-09 10:39:09,562 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:09,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:09,563 INFO L82 PathProgramCache]: Analyzing trace with hash -742348243, now seen corresponding path program 167 times [2020-10-09 10:39:09,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:09,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905854819] [2020-10-09 10:39:09,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:09,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:09,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905854819] [2020-10-09 10:39:09,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28168979] [2020-10-09 10:39:09,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:09,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:39:09,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:09,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:09,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:09,907 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:39:09,908 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:39:09,910 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:39:09,911 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:39:09,913 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:39:09,914 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:39:09,916 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:39:09,917 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:39:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:09,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:09,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:09,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194941193] [2020-10-09 10:39:09,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:09,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:09,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:09,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:09,973 INFO L87 Difference]: Start difference. First operand 271 states and 713 transitions. Second operand 17 states. [2020-10-09 10:39:10,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:10,991 INFO L93 Difference]: Finished difference Result 384 states and 973 transitions. [2020-10-09 10:39:10,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:39:10,992 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:10,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:10,993 INFO L225 Difference]: With dead ends: 384 [2020-10-09 10:39:10,993 INFO L226 Difference]: Without dead ends: 379 [2020-10-09 10:39:10,993 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=411, Invalid=921, Unknown=0, NotChecked=0, Total=1332 [2020-10-09 10:39:10,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-10-09 10:39:11,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 269. [2020-10-09 10:39:11,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-09 10:39:11,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 707 transitions. [2020-10-09 10:39:11,004 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 707 transitions. Word has length 14 [2020-10-09 10:39:11,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:11,004 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 707 transitions. [2020-10-09 10:39:11,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:11,004 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 707 transitions. [2020-10-09 10:39:11,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:11,004 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:11,004 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:11,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:11,205 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:11,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:11,206 INFO L82 PathProgramCache]: Analyzing trace with hash -742340772, now seen corresponding path program 168 times [2020-10-09 10:39:11,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:11,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890319280] [2020-10-09 10:39:11,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:11,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:11,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890319280] [2020-10-09 10:39:11,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310423907] [2020-10-09 10:39:11,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:11,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:39:11,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:11,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:11,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:13,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:13,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:13,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:13,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148769857] [2020-10-09 10:39:13,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:13,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:13,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:13,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=196, Unknown=1, NotChecked=0, Total=272 [2020-10-09 10:39:13,687 INFO L87 Difference]: Start difference. First operand 269 states and 707 transitions. Second operand 17 states. [2020-10-09 10:39:18,003 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-09 10:39:22,225 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-09 10:39:22,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:22,765 INFO L93 Difference]: Finished difference Result 403 states and 1011 transitions. [2020-10-09 10:39:22,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-09 10:39:22,767 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:22,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:22,767 INFO L225 Difference]: With dead ends: 403 [2020-10-09 10:39:22,768 INFO L226 Difference]: Without dead ends: 398 [2020-10-09 10:39:22,768 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=348, Invalid=841, Unknown=1, NotChecked=0, Total=1190 [2020-10-09 10:39:22,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-10-09 10:39:22,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 273. [2020-10-09 10:39:22,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-09 10:39:22,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 721 transitions. [2020-10-09 10:39:22,772 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 721 transitions. Word has length 14 [2020-10-09 10:39:22,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:22,772 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 721 transitions. [2020-10-09 10:39:22,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:22,772 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 721 transitions. [2020-10-09 10:39:22,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:22,772 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:22,772 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:22,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2020-10-09 10:39:22,973 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:22,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:22,974 INFO L82 PathProgramCache]: Analyzing trace with hash -742319413, now seen corresponding path program 169 times [2020-10-09 10:39:22,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:22,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868384706] [2020-10-09 10:39:22,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:23,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:23,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868384706] [2020-10-09 10:39:23,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926020527] [2020-10-09 10:39:23,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:23,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:23,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:23,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:26,046 WARN L860 $PredicateComparison]: unable to prove that (exists ((aux_div_aux_mod_v_~j~0_491_43_92 Int) (v_~i~0_529 Int) (aux_div_v_~j~0_491_43 Int)) (let ((.cse1 (* 2 aux_div_aux_mod_v_~j~0_491_43_92)) (.cse0 (* 2 aux_div_v_~j~0_491_43))) (and (<= aux_div_v_~j~0_491_43 1) (<= (+ c_~j~0 .cse0) (* 2 v_~i~0_529)) (<= (+ .cse1 .cse0 1) v_~i~0_529) (<= c_~i~0 (+ v_~i~0_529 c_~j~0)) (<= aux_div_aux_mod_v_~j~0_491_43_92 1) (<= c_~j~0 (+ .cse1 v_~i~0_529 2)) (<= v_~i~0_529 (+ .cse1 .cse0 3))))) is different from true [2020-10-09 10:39:26,051 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:39:26,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:39:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:26,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:26,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:26,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752112182] [2020-10-09 10:39:26,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:26,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:26,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:26,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=162, Unknown=2, NotChecked=28, Total=272 [2020-10-09 10:39:26,111 INFO L87 Difference]: Start difference. First operand 273 states and 721 transitions. Second operand 17 states. [2020-10-09 10:39:26,585 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-09 10:39:30,719 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-09 10:39:36,452 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-09 10:39:39,693 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-10-09 10:39:48,384 WARN L193 SmtUtils]: Spent 773.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2020-10-09 10:39:48,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:48,442 INFO L93 Difference]: Finished difference Result 441 states and 1132 transitions. [2020-10-09 10:39:48,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 10:39:48,443 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:48,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:48,443 INFO L225 Difference]: With dead ends: 441 [2020-10-09 10:39:48,444 INFO L226 Difference]: Without dead ends: 434 [2020-10-09 10:39:48,444 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=482, Invalid=1071, Unknown=11, NotChecked=76, Total=1640 [2020-10-09 10:39:48,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-10-09 10:39:48,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 274. [2020-10-09 10:39:48,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-09 10:39:48,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 726 transitions. [2020-10-09 10:39:48,449 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 726 transitions. Word has length 14 [2020-10-09 10:39:48,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:48,449 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 726 transitions. [2020-10-09 10:39:48,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:48,449 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 726 transitions. [2020-10-09 10:39:48,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:48,454 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:48,454 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:48,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:48,655 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:48,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:48,656 INFO L82 PathProgramCache]: Analyzing trace with hash -742318452, now seen corresponding path program 170 times [2020-10-09 10:39:48,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:48,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843971684] [2020-10-09 10:39:48,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:48,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:48,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:48,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843971684] [2020-10-09 10:39:48,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600713090] [2020-10-09 10:39:48,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:48,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:39:48,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:48,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:48,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:51,065 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:39:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:51,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:51,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:51,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309720528] [2020-10-09 10:39:51,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:51,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:51,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:51,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=189, Unknown=1, NotChecked=0, Total=272 [2020-10-09 10:39:51,109 INFO L87 Difference]: Start difference. First operand 274 states and 726 transitions. Second operand 17 states. [2020-10-09 10:39:52,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:52,519 INFO L93 Difference]: Finished difference Result 425 states and 1076 transitions. [2020-10-09 10:39:52,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:39:52,520 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:52,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:52,520 INFO L225 Difference]: With dead ends: 425 [2020-10-09 10:39:52,520 INFO L226 Difference]: Without dead ends: 415 [2020-10-09 10:39:52,520 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=425, Invalid=980, Unknown=1, NotChecked=0, Total=1406 [2020-10-09 10:39:52,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2020-10-09 10:39:52,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 268. [2020-10-09 10:39:52,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-09 10:39:52,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 712 transitions. [2020-10-09 10:39:52,524 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 712 transitions. Word has length 14 [2020-10-09 10:39:52,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:52,524 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 712 transitions. [2020-10-09 10:39:52,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:52,524 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 712 transitions. [2020-10-09 10:39:52,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:52,525 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:52,525 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:52,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:52,727 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:52,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:52,728 INFO L82 PathProgramCache]: Analyzing trace with hash -742110132, now seen corresponding path program 171 times [2020-10-09 10:39:52,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:52,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203533469] [2020-10-09 10:39:52,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:52,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:52,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203533469] [2020-10-09 10:39:52,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538982024] [2020-10-09 10:39:52,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:52,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:39:52,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:52,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:52,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:53,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:53,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:53,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:53,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921713878] [2020-10-09 10:39:53,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:53,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:53,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:53,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:53,113 INFO L87 Difference]: Start difference. First operand 268 states and 712 transitions. Second operand 17 states. [2020-10-09 10:39:53,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:53,575 INFO L93 Difference]: Finished difference Result 368 states and 929 transitions. [2020-10-09 10:39:53,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:39:53,576 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:53,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:53,576 INFO L225 Difference]: With dead ends: 368 [2020-10-09 10:39:53,577 INFO L226 Difference]: Without dead ends: 364 [2020-10-09 10:39:53,577 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:39:53,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-10-09 10:39:53,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 267. [2020-10-09 10:39:53,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-09 10:39:53,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 709 transitions. [2020-10-09 10:39:53,580 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 709 transitions. Word has length 14 [2020-10-09 10:39:53,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:53,580 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 709 transitions. [2020-10-09 10:39:53,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:53,580 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 709 transitions. [2020-10-09 10:39:53,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:53,581 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:53,581 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:53,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-09 10:39:53,782 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:53,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:53,782 INFO L82 PathProgramCache]: Analyzing trace with hash -741447042, now seen corresponding path program 172 times [2020-10-09 10:39:53,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:53,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319858304] [2020-10-09 10:39:53,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:53,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319858304] [2020-10-09 10:39:53,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781471110] [2020-10-09 10:39:53,884 INFO L93 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:53,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:39:53,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:53,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:53,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:54,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:54,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:54,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279642676] [2020-10-09 10:39:54,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:54,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:54,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:54,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:54,205 INFO L87 Difference]: Start difference. First operand 267 states and 709 transitions. Second operand 17 states. [2020-10-09 10:39:54,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:54,949 INFO L93 Difference]: Finished difference Result 384 states and 970 transitions. [2020-10-09 10:39:54,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:39:54,951 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:54,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:54,952 INFO L225 Difference]: With dead ends: 384 [2020-10-09 10:39:54,952 INFO L226 Difference]: Without dead ends: 380 [2020-10-09 10:39:54,952 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:39:54,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-09 10:39:54,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 268. [2020-10-09 10:39:54,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-09 10:39:54,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 711 transitions. [2020-10-09 10:39:54,956 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 711 transitions. Word has length 14 [2020-10-09 10:39:54,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:54,956 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 711 transitions. [2020-10-09 10:39:54,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:54,956 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 711 transitions. [2020-10-09 10:39:54,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:54,957 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:54,957 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:55,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-09 10:39:55,158 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:55,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:55,158 INFO L82 PathProgramCache]: Analyzing trace with hash -741424722, now seen corresponding path program 173 times [2020-10-09 10:39:55,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:55,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235132223] [2020-10-09 10:39:55,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:55,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235132223] [2020-10-09 10:39:55,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165846538] [2020-10-09 10:39:55,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:55,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:39:55,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:55,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:55,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:55,508 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:39:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:55,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:55,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:55,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160423242] [2020-10-09 10:39:55,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:55,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:55,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:55,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:55,535 INFO L87 Difference]: Start difference. First operand 268 states and 711 transitions. Second operand 17 states. [2020-10-09 10:39:56,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:56,727 INFO L93 Difference]: Finished difference Result 416 states and 1051 transitions. [2020-10-09 10:39:56,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:39:56,728 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:56,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:56,728 INFO L225 Difference]: With dead ends: 416 [2020-10-09 10:39:56,728 INFO L226 Difference]: Without dead ends: 410 [2020-10-09 10:39:56,729 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2020-10-09 10:39:56,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-10-09 10:39:56,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 266. [2020-10-09 10:39:56,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-09 10:39:56,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 704 transitions. [2020-10-09 10:39:56,733 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 704 transitions. Word has length 14 [2020-10-09 10:39:56,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:56,733 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 704 transitions. [2020-10-09 10:39:56,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:56,734 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 704 transitions. [2020-10-09 10:39:56,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:56,734 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:56,734 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:56,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-09 10:39:56,939 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:56,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:56,939 INFO L82 PathProgramCache]: Analyzing trace with hash -541944403, now seen corresponding path program 174 times [2020-10-09 10:39:56,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:56,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546042134] [2020-10-09 10:39:56,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:56,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:57,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546042134] [2020-10-09 10:39:57,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426895682] [2020-10-09 10:39:57,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:57,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:39:57,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:57,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:57,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:57,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:57,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:57,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:57,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283347866] [2020-10-09 10:39:57,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:57,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:57,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:57,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:57,276 INFO L87 Difference]: Start difference. First operand 266 states and 704 transitions. Second operand 17 states. [2020-10-09 10:39:57,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:57,710 INFO L93 Difference]: Finished difference Result 355 states and 889 transitions. [2020-10-09 10:39:57,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:39:57,710 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:57,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:57,711 INFO L225 Difference]: With dead ends: 355 [2020-10-09 10:39:57,711 INFO L226 Difference]: Without dead ends: 352 [2020-10-09 10:39:57,711 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:39:57,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-09 10:39:57,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 270. [2020-10-09 10:39:57,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-09 10:39:57,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 718 transitions. [2020-10-09 10:39:57,715 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 718 transitions. Word has length 14 [2020-10-09 10:39:57,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:57,715 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 718 transitions. [2020-10-09 10:39:57,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:57,715 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 718 transitions. [2020-10-09 10:39:57,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:57,716 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:57,716 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:57,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-10-09 10:39:57,917 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:57,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:57,917 INFO L82 PathProgramCache]: Analyzing trace with hash -541943442, now seen corresponding path program 175 times [2020-10-09 10:39:57,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:57,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838026877] [2020-10-09 10:39:57,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:58,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838026877] [2020-10-09 10:39:58,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233721211] [2020-10-09 10:39:58,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:58,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:58,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:58,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:58,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:58,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441818477] [2020-10-09 10:39:58,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:58,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:58,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:58,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:58,268 INFO L87 Difference]: Start difference. First operand 270 states and 718 transitions. Second operand 17 states. [2020-10-09 10:39:58,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:58,711 INFO L93 Difference]: Finished difference Result 390 states and 972 transitions. [2020-10-09 10:39:58,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:39:58,713 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:58,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:58,713 INFO L225 Difference]: With dead ends: 390 [2020-10-09 10:39:58,714 INFO L226 Difference]: Without dead ends: 385 [2020-10-09 10:39:58,714 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:39:58,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-10-09 10:39:58,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 271. [2020-10-09 10:39:58,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-09 10:39:58,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 721 transitions. [2020-10-09 10:39:58,718 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 721 transitions. Word has length 14 [2020-10-09 10:39:58,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:58,718 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 721 transitions. [2020-10-09 10:39:58,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:58,718 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 721 transitions. [2020-10-09 10:39:58,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:58,719 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:58,719 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:58,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-09 10:39:58,919 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:58,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:58,920 INFO L82 PathProgramCache]: Analyzing trace with hash -541914612, now seen corresponding path program 176 times [2020-10-09 10:39:58,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:58,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164353031] [2020-10-09 10:39:58,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:59,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164353031] [2020-10-09 10:39:59,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680387362] [2020-10-09 10:39:59,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:59,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:39:59,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:59,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:59,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:59,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:59,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:59,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839461600] [2020-10-09 10:39:59,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:59,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:59,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:59,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:59,256 INFO L87 Difference]: Start difference. First operand 271 states and 721 transitions. Second operand 17 states. [2020-10-09 10:39:59,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:59,652 INFO L93 Difference]: Finished difference Result 392 states and 981 transitions. [2020-10-09 10:39:59,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:39:59,652 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:59,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:59,653 INFO L225 Difference]: With dead ends: 392 [2020-10-09 10:39:59,653 INFO L226 Difference]: Without dead ends: 387 [2020-10-09 10:39:59,653 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:39:59,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-10-09 10:39:59,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 270. [2020-10-09 10:39:59,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-09 10:39:59,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 718 transitions. [2020-10-09 10:39:59,658 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 718 transitions. Word has length 14 [2020-10-09 10:39:59,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:59,658 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 718 transitions. [2020-10-09 10:39:59,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:59,659 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 718 transitions. [2020-10-09 10:39:59,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:59,659 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:59,659 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:59,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2020-10-09 10:39:59,860 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:59,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:59,860 INFO L82 PathProgramCache]: Analyzing trace with hash -540990130, now seen corresponding path program 177 times [2020-10-09 10:39:59,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:59,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550444233] [2020-10-09 10:39:59,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:59,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:59,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550444233] [2020-10-09 10:39:59,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137790786] [2020-10-09 10:39:59,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:00,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:40:00,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:00,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:00,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:00,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:00,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:00,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:00,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292308685] [2020-10-09 10:40:00,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:00,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:00,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:00,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:00,232 INFO L87 Difference]: Start difference. First operand 270 states and 718 transitions. Second operand 17 states. [2020-10-09 10:40:00,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:00,578 INFO L93 Difference]: Finished difference Result 359 states and 898 transitions. [2020-10-09 10:40:00,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:40:00,578 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:00,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:00,579 INFO L225 Difference]: With dead ends: 359 [2020-10-09 10:40:00,579 INFO L226 Difference]: Without dead ends: 343 [2020-10-09 10:40:00,579 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:40:00,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-09 10:40:00,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 268. [2020-10-09 10:40:00,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-09 10:40:00,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 710 transitions. [2020-10-09 10:40:00,583 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 710 transitions. Word has length 14 [2020-10-09 10:40:00,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:00,584 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 710 transitions. [2020-10-09 10:40:00,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:00,584 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 710 transitions. [2020-10-09 10:40:00,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:00,584 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:00,584 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:00,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:00,785 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:00,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:00,785 INFO L82 PathProgramCache]: Analyzing trace with hash 95285087, now seen corresponding path program 178 times [2020-10-09 10:40:00,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:00,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944353231] [2020-10-09 10:40:00,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:00,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944353231] [2020-10-09 10:40:00,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401254099] [2020-10-09 10:40:00,889 INFO L93 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:00,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:40:00,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:00,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:00,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:01,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:01,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:01,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:01,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555914370] [2020-10-09 10:40:01,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:01,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:01,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:01,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:01,124 INFO L87 Difference]: Start difference. First operand 268 states and 710 transitions. Second operand 17 states. [2020-10-09 10:40:01,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:01,829 INFO L93 Difference]: Finished difference Result 369 states and 917 transitions. [2020-10-09 10:40:01,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:40:01,830 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:01,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:01,831 INFO L225 Difference]: With dead ends: 369 [2020-10-09 10:40:01,831 INFO L226 Difference]: Without dead ends: 366 [2020-10-09 10:40:01,831 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2020-10-09 10:40:01,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-10-09 10:40:01,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 271. [2020-10-09 10:40:01,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-09 10:40:01,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 721 transitions. [2020-10-09 10:40:01,835 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 721 transitions. Word has length 14 [2020-10-09 10:40:01,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:01,835 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 721 transitions. [2020-10-09 10:40:01,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:01,835 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 721 transitions. [2020-10-09 10:40:01,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:01,835 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:01,835 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:02,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2020-10-09 10:40:02,036 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:02,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:02,037 INFO L82 PathProgramCache]: Analyzing trace with hash 95286048, now seen corresponding path program 179 times [2020-10-09 10:40:02,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:02,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383472756] [2020-10-09 10:40:02,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:02,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383472756] [2020-10-09 10:40:02,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347893889] [2020-10-09 10:40:02,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:02,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:40:02,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:02,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:02,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:02,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:02,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:02,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414780109] [2020-10-09 10:40:02,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:02,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:02,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:02,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:02,390 INFO L87 Difference]: Start difference. First operand 271 states and 721 transitions. Second operand 17 states. [2020-10-09 10:40:03,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:03,086 INFO L93 Difference]: Finished difference Result 425 states and 1047 transitions. [2020-10-09 10:40:03,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:40:03,086 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:03,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:03,087 INFO L225 Difference]: With dead ends: 425 [2020-10-09 10:40:03,087 INFO L226 Difference]: Without dead ends: 410 [2020-10-09 10:40:03,088 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056 [2020-10-09 10:40:03,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-10-09 10:40:03,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 276. [2020-10-09 10:40:03,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-09 10:40:03,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 733 transitions. [2020-10-09 10:40:03,092 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 733 transitions. Word has length 14 [2020-10-09 10:40:03,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:03,092 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 733 transitions. [2020-10-09 10:40:03,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:03,092 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 733 transitions. [2020-10-09 10:40:03,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:03,092 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:03,092 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:03,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:03,293 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:03,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:03,294 INFO L82 PathProgramCache]: Analyzing trace with hash 95314878, now seen corresponding path program 180 times [2020-10-09 10:40:03,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:03,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413916165] [2020-10-09 10:40:03,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:03,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:03,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413916165] [2020-10-09 10:40:03,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075731385] [2020-10-09 10:40:03,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:03,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:40:03,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:03,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:03,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:03,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:03,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:03,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:03,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235588664] [2020-10-09 10:40:03,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:03,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:03,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:03,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:03,699 INFO L87 Difference]: Start difference. First operand 276 states and 733 transitions. Second operand 17 states. [2020-10-09 10:40:04,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:04,466 INFO L93 Difference]: Finished difference Result 404 states and 1006 transitions. [2020-10-09 10:40:04,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 10:40:04,468 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:04,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:04,469 INFO L225 Difference]: With dead ends: 404 [2020-10-09 10:40:04,469 INFO L226 Difference]: Without dead ends: 399 [2020-10-09 10:40:04,469 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=274, Invalid=718, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:40:04,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2020-10-09 10:40:04,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 274. [2020-10-09 10:40:04,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-09 10:40:04,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 728 transitions. [2020-10-09 10:40:04,473 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 728 transitions. Word has length 14 [2020-10-09 10:40:04,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:04,473 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 728 transitions. [2020-10-09 10:40:04,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:04,473 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 728 transitions. [2020-10-09 10:40:04,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:04,474 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:04,474 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:04,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:04,675 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:04,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:04,675 INFO L82 PathProgramCache]: Analyzing trace with hash 115840877, now seen corresponding path program 181 times [2020-10-09 10:40:04,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:04,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995933316] [2020-10-09 10:40:04,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:04,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:04,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995933316] [2020-10-09 10:40:04,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553317261] [2020-10-09 10:40:04,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:04,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:04,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:04,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:05,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:05,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:05,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860782017] [2020-10-09 10:40:05,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:05,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:05,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:05,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:05,001 INFO L87 Difference]: Start difference. First operand 274 states and 728 transitions. Second operand 17 states. [2020-10-09 10:40:05,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:05,794 INFO L93 Difference]: Finished difference Result 369 states and 920 transitions. [2020-10-09 10:40:05,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:40:05,795 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:05,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:05,796 INFO L225 Difference]: With dead ends: 369 [2020-10-09 10:40:05,796 INFO L226 Difference]: Without dead ends: 366 [2020-10-09 10:40:05,796 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-09 10:40:05,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-10-09 10:40:05,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 276. [2020-10-09 10:40:05,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-09 10:40:05,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 736 transitions. [2020-10-09 10:40:05,800 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 736 transitions. Word has length 14 [2020-10-09 10:40:05,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:05,800 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 736 transitions. [2020-10-09 10:40:05,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:05,800 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 736 transitions. [2020-10-09 10:40:05,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:05,801 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:05,801 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:06,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:06,002 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:06,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:06,002 INFO L82 PathProgramCache]: Analyzing trace with hash 115841838, now seen corresponding path program 182 times [2020-10-09 10:40:06,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:06,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482029344] [2020-10-09 10:40:06,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:06,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:06,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482029344] [2020-10-09 10:40:06,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012963996] [2020-10-09 10:40:06,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:06,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:40:06,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:06,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:06,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:06,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:06,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:06,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772814368] [2020-10-09 10:40:06,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:06,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:06,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:06,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:06,346 INFO L87 Difference]: Start difference. First operand 276 states and 736 transitions. Second operand 17 states. [2020-10-09 10:40:07,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:07,153 INFO L93 Difference]: Finished difference Result 401 states and 999 transitions. [2020-10-09 10:40:07,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-09 10:40:07,153 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:07,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:07,154 INFO L225 Difference]: With dead ends: 401 [2020-10-09 10:40:07,154 INFO L226 Difference]: Without dead ends: 396 [2020-10-09 10:40:07,154 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-09 10:40:07,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-10-09 10:40:07,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 278. [2020-10-09 10:40:07,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-09 10:40:07,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 742 transitions. [2020-10-09 10:40:07,159 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 742 transitions. Word has length 14 [2020-10-09 10:40:07,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:07,159 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 742 transitions. [2020-10-09 10:40:07,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:07,159 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 742 transitions. [2020-10-09 10:40:07,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:07,160 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:07,160 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:07,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-09 10:40:07,360 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:07,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:07,361 INFO L82 PathProgramCache]: Analyzing trace with hash 116503967, now seen corresponding path program 183 times [2020-10-09 10:40:07,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:07,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700577408] [2020-10-09 10:40:07,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:07,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:07,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700577408] [2020-10-09 10:40:07,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351558309] [2020-10-09 10:40:07,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:07,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:40:07,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:07,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 10:40:07,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:07,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:07,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-10-09 10:40:07,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798340234] [2020-10-09 10:40:07,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 10:40:07,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:07,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 10:40:07,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-10-09 10:40:07,629 INFO L87 Difference]: Start difference. First operand 278 states and 742 transitions. Second operand 16 states. [2020-10-09 10:40:08,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:08,365 INFO L93 Difference]: Finished difference Result 360 states and 898 transitions. [2020-10-09 10:40:08,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:40:08,366 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2020-10-09 10:40:08,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:08,366 INFO L225 Difference]: With dead ends: 360 [2020-10-09 10:40:08,367 INFO L226 Difference]: Without dead ends: 357 [2020-10-09 10:40:08,367 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=282, Invalid=710, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:40:08,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-09 10:40:08,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 280. [2020-10-09 10:40:08,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-09 10:40:08,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 749 transitions. [2020-10-09 10:40:08,372 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 749 transitions. Word has length 14 [2020-10-09 10:40:08,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:08,372 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 749 transitions. [2020-10-09 10:40:08,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 10:40:08,372 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 749 transitions. [2020-10-09 10:40:08,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:08,372 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:08,372 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:08,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:08,573 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:08,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:08,574 INFO L82 PathProgramCache]: Analyzing trace with hash 116525326, now seen corresponding path program 184 times [2020-10-09 10:40:08,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:08,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076012934] [2020-10-09 10:40:08,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:08,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:08,683 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:08,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076012934] [2020-10-09 10:40:08,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321333531] [2020-10-09 10:40:08,684 INFO L93 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:08,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:40:08,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:08,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:08,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:08,879 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:40:08,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:08,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:08,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:08,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991196193] [2020-10-09 10:40:08,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:08,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:08,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:08,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:08,894 INFO L87 Difference]: Start difference. First operand 280 states and 749 transitions. Second operand 17 states. [2020-10-09 10:40:09,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:09,614 INFO L93 Difference]: Finished difference Result 316 states and 812 transitions. [2020-10-09 10:40:09,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 10:40:09,615 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:09,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:09,616 INFO L225 Difference]: With dead ends: 316 [2020-10-09 10:40:09,616 INFO L226 Difference]: Without dead ends: 308 [2020-10-09 10:40:09,616 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=436, Invalid=896, Unknown=0, NotChecked=0, Total=1332 [2020-10-09 10:40:09,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-10-09 10:40:09,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 280. [2020-10-09 10:40:09,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-09 10:40:09,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 745 transitions. [2020-10-09 10:40:09,620 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 745 transitions. Word has length 14 [2020-10-09 10:40:09,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:09,622 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 745 transitions. [2020-10-09 10:40:09,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:09,622 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 745 transitions. [2020-10-09 10:40:09,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:09,623 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:09,623 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:09,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-09 10:40:09,832 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:09,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:09,833 INFO L82 PathProgramCache]: Analyzing trace with hash 116526287, now seen corresponding path program 185 times [2020-10-09 10:40:09,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:09,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240354498] [2020-10-09 10:40:09,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:09,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:09,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240354498] [2020-10-09 10:40:09,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327722434] [2020-10-09 10:40:09,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:09,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:40:09,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:09,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:09,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:10,130 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:40:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:10,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:10,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:10,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910053809] [2020-10-09 10:40:10,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:10,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:10,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:10,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:10,184 INFO L87 Difference]: Start difference. First operand 280 states and 745 transitions. Second operand 17 states. [2020-10-09 10:40:11,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:11,203 INFO L93 Difference]: Finished difference Result 392 states and 995 transitions. [2020-10-09 10:40:11,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 10:40:11,205 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:11,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:11,206 INFO L225 Difference]: With dead ends: 392 [2020-10-09 10:40:11,206 INFO L226 Difference]: Without dead ends: 387 [2020-10-09 10:40:11,206 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=487, Invalid=1153, Unknown=0, NotChecked=0, Total=1640 [2020-10-09 10:40:11,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-10-09 10:40:11,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 278. [2020-10-09 10:40:11,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-09 10:40:11,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 739 transitions. [2020-10-09 10:40:11,210 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 739 transitions. Word has length 14 [2020-10-09 10:40:11,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:11,211 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 739 transitions. [2020-10-09 10:40:11,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:11,211 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 739 transitions. [2020-10-09 10:40:11,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:11,211 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:11,211 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:11,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-09 10:40:11,412 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:11,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:11,413 INFO L82 PathProgramCache]: Analyzing trace with hash 116533758, now seen corresponding path program 186 times [2020-10-09 10:40:11,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:11,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473247587] [2020-10-09 10:40:11,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:11,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:11,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:11,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473247587] [2020-10-09 10:40:11,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970583829] [2020-10-09 10:40:11,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:11,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:40:11,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:11,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:11,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:11,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:11,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:11,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645181363] [2020-10-09 10:40:11,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:11,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:11,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:11,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:11,754 INFO L87 Difference]: Start difference. First operand 278 states and 739 transitions. Second operand 17 states. [2020-10-09 10:40:12,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:12,699 INFO L93 Difference]: Finished difference Result 409 states and 1032 transitions. [2020-10-09 10:40:12,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-09 10:40:12,700 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:12,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:12,701 INFO L225 Difference]: With dead ends: 409 [2020-10-09 10:40:12,701 INFO L226 Difference]: Without dead ends: 404 [2020-10-09 10:40:12,701 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2020-10-09 10:40:12,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-09 10:40:12,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 282. [2020-10-09 10:40:12,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-09 10:40:12,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 753 transitions. [2020-10-09 10:40:12,705 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 753 transitions. Word has length 14 [2020-10-09 10:40:12,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:12,705 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 753 transitions. [2020-10-09 10:40:12,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:12,705 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 753 transitions. [2020-10-09 10:40:12,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:12,706 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:12,706 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:12,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:12,907 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:12,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:12,907 INFO L82 PathProgramCache]: Analyzing trace with hash 116555117, now seen corresponding path program 187 times [2020-10-09 10:40:12,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:12,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346055729] [2020-10-09 10:40:12,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:13,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346055729] [2020-10-09 10:40:13,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881153720] [2020-10-09 10:40:13,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:13,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:13,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:13,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:13,235 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:40:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:13,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:13,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:13,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450204568] [2020-10-09 10:40:13,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:13,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:13,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:13,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:13,286 INFO L87 Difference]: Start difference. First operand 282 states and 753 transitions. Second operand 17 states. [2020-10-09 10:40:14,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:14,358 INFO L93 Difference]: Finished difference Result 409 states and 1039 transitions. [2020-10-09 10:40:14,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 10:40:14,359 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:14,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:14,359 INFO L225 Difference]: With dead ends: 409 [2020-10-09 10:40:14,359 INFO L226 Difference]: Without dead ends: 404 [2020-10-09 10:40:14,360 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2020-10-09 10:40:14,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-09 10:40:14,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 282. [2020-10-09 10:40:14,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-09 10:40:14,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 753 transitions. [2020-10-09 10:40:14,364 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 753 transitions. Word has length 14 [2020-10-09 10:40:14,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:14,365 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 753 transitions. [2020-10-09 10:40:14,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:14,365 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 753 transitions. [2020-10-09 10:40:14,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:14,365 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:14,365 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:14,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-09 10:40:14,566 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:14,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:14,566 INFO L82 PathProgramCache]: Analyzing trace with hash 116556078, now seen corresponding path program 188 times [2020-10-09 10:40:14,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:14,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949157707] [2020-10-09 10:40:14,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:14,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949157707] [2020-10-09 10:40:14,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22563385] [2020-10-09 10:40:14,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:14,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:40:14,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:14,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:14,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:14,880 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:40:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:14,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:14,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:14,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27167339] [2020-10-09 10:40:14,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:14,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:14,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:14,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:14,905 INFO L87 Difference]: Start difference. First operand 282 states and 753 transitions. Second operand 17 states. [2020-10-09 10:40:16,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:16,208 INFO L93 Difference]: Finished difference Result 436 states and 1104 transitions. [2020-10-09 10:40:16,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 10:40:16,209 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:16,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:16,209 INFO L225 Difference]: With dead ends: 436 [2020-10-09 10:40:16,209 INFO L226 Difference]: Without dead ends: 426 [2020-10-09 10:40:16,210 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-10-09 10:40:16,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-09 10:40:16,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 275. [2020-10-09 10:40:16,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-09 10:40:16,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 734 transitions. [2020-10-09 10:40:16,214 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 734 transitions. Word has length 14 [2020-10-09 10:40:16,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:16,215 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 734 transitions. [2020-10-09 10:40:16,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:16,215 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 734 transitions. [2020-10-09 10:40:16,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:16,215 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:16,215 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:16,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2020-10-09 10:40:16,416 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:16,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:16,416 INFO L82 PathProgramCache]: Analyzing trace with hash 116764398, now seen corresponding path program 189 times [2020-10-09 10:40:16,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:16,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277641627] [2020-10-09 10:40:16,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:16,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277641627] [2020-10-09 10:40:16,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110118689] [2020-10-09 10:40:16,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:16,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:40:16,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:16,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:16,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:16,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:16,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:16,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:16,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048795364] [2020-10-09 10:40:16,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:16,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:16,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:16,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:16,760 INFO L87 Difference]: Start difference. First operand 275 states and 734 transitions. Second operand 17 states. [2020-10-09 10:40:17,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:17,486 INFO L93 Difference]: Finished difference Result 421 states and 1054 transitions. [2020-10-09 10:40:17,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:40:17,488 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:17,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:17,488 INFO L225 Difference]: With dead ends: 421 [2020-10-09 10:40:17,489 INFO L226 Difference]: Without dead ends: 407 [2020-10-09 10:40:17,489 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=314, Invalid=808, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:40:17,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-10-09 10:40:17,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 277. [2020-10-09 10:40:17,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-09 10:40:17,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 743 transitions. [2020-10-09 10:40:17,494 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 743 transitions. Word has length 14 [2020-10-09 10:40:17,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:17,494 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 743 transitions. [2020-10-09 10:40:17,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:17,494 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 743 transitions. [2020-10-09 10:40:17,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:17,495 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:17,495 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:17,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:17,696 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:17,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:17,696 INFO L82 PathProgramCache]: Analyzing trace with hash 117427488, now seen corresponding path program 190 times [2020-10-09 10:40:17,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:17,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964159160] [2020-10-09 10:40:17,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:17,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:17,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964159160] [2020-10-09 10:40:17,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579219255] [2020-10-09 10:40:17,830 INFO L93 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:17,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:40:17,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:17,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:17,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:18,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:18,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:18,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:18,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027972957] [2020-10-09 10:40:18,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:18,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:18,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:18,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:18,135 INFO L87 Difference]: Start difference. First operand 277 states and 743 transitions. Second operand 17 states. [2020-10-09 10:40:18,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:18,992 INFO L93 Difference]: Finished difference Result 410 states and 1043 transitions. [2020-10-09 10:40:18,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:40:18,994 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:18,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:18,995 INFO L225 Difference]: With dead ends: 410 [2020-10-09 10:40:18,995 INFO L226 Difference]: Without dead ends: 405 [2020-10-09 10:40:18,995 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=396, Invalid=936, Unknown=0, NotChecked=0, Total=1332 [2020-10-09 10:40:18,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-10-09 10:40:18,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 281. [2020-10-09 10:40:18,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-10-09 10:40:18,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 757 transitions. [2020-10-09 10:40:18,999 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 757 transitions. Word has length 14 [2020-10-09 10:40:19,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:19,000 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 757 transitions. [2020-10-09 10:40:19,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:19,000 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 757 transitions. [2020-10-09 10:40:19,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:19,000 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:19,000 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:19,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:19,201 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:19,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:19,202 INFO L82 PathProgramCache]: Analyzing trace with hash 117448847, now seen corresponding path program 191 times [2020-10-09 10:40:19,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:19,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996537076] [2020-10-09 10:40:19,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:19,314 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:19,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996537076] [2020-10-09 10:40:19,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268313560] [2020-10-09 10:40:19,315 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:19,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:40:19,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:19,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:19,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:19,513 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:40:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:19,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:19,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:19,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818140704] [2020-10-09 10:40:19,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:19,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:19,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:19,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:19,529 INFO L87 Difference]: Start difference. First operand 281 states and 757 transitions. Second operand 17 states. [2020-10-09 10:40:20,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:20,600 INFO L93 Difference]: Finished difference Result 431 states and 1100 transitions. [2020-10-09 10:40:20,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 10:40:20,601 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:20,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:20,602 INFO L225 Difference]: With dead ends: 431 [2020-10-09 10:40:20,602 INFO L226 Difference]: Without dead ends: 421 [2020-10-09 10:40:20,603 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-10-09 10:40:20,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-10-09 10:40:20,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 282. [2020-10-09 10:40:20,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-09 10:40:20,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 762 transitions. [2020-10-09 10:40:20,607 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 762 transitions. Word has length 14 [2020-10-09 10:40:20,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:20,607 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 762 transitions. [2020-10-09 10:40:20,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:20,607 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 762 transitions. [2020-10-09 10:40:20,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:20,607 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:20,608 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:20,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:20,808 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:20,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:20,809 INFO L82 PathProgramCache]: Analyzing trace with hash 117449808, now seen corresponding path program 192 times [2020-10-09 10:40:20,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:20,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041480924] [2020-10-09 10:40:20,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:20,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:20,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041480924] [2020-10-09 10:40:20,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736815690] [2020-10-09 10:40:20,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:20,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:40:20,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:20,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:20,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:21,110 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:40:21,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:21,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:21,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:21,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536209598] [2020-10-09 10:40:21,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:21,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:21,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:21,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:21,124 INFO L87 Difference]: Start difference. First operand 282 states and 762 transitions. Second operand 17 states. [2020-10-09 10:40:22,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:22,100 INFO L93 Difference]: Finished difference Result 457 states and 1163 transitions. [2020-10-09 10:40:22,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-09 10:40:22,101 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:22,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:22,102 INFO L225 Difference]: With dead ends: 457 [2020-10-09 10:40:22,102 INFO L226 Difference]: Without dead ends: 447 [2020-10-09 10:40:22,102 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-10-09 10:40:22,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-10-09 10:40:22,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 278. [2020-10-09 10:40:22,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-09 10:40:22,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 748 transitions. [2020-10-09 10:40:22,107 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 748 transitions. Word has length 14 [2020-10-09 10:40:22,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:22,107 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 748 transitions. [2020-10-09 10:40:22,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:22,107 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 748 transitions. [2020-10-09 10:40:22,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:22,108 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:22,108 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:22,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:22,309 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:22,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:22,309 INFO L82 PathProgramCache]: Analyzing trace with hash 117478638, now seen corresponding path program 193 times [2020-10-09 10:40:22,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:22,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231367955] [2020-10-09 10:40:22,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:22,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231367955] [2020-10-09 10:40:22,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987238063] [2020-10-09 10:40:22,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:22,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:22,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:22,621 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:40:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:22,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:22,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:22,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398782992] [2020-10-09 10:40:22,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:22,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:22,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:22,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:22,645 INFO L87 Difference]: Start difference. First operand 278 states and 748 transitions. Second operand 17 states. [2020-10-09 10:40:23,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:23,743 INFO L93 Difference]: Finished difference Result 441 states and 1123 transitions. [2020-10-09 10:40:23,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-09 10:40:23,744 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:23,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:23,744 INFO L225 Difference]: With dead ends: 441 [2020-10-09 10:40:23,744 INFO L226 Difference]: Without dead ends: 431 [2020-10-09 10:40:23,745 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-10-09 10:40:23,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-10-09 10:40:23,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 277. [2020-10-09 10:40:23,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-09 10:40:23,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 744 transitions. [2020-10-09 10:40:23,749 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 744 transitions. Word has length 14 [2020-10-09 10:40:23,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:23,750 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 744 transitions. [2020-10-09 10:40:23,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:23,750 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 744 transitions. [2020-10-09 10:40:23,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:23,750 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:23,750 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:23,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:23,951 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:23,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:23,951 INFO L82 PathProgramCache]: Analyzing trace with hash 144470028, now seen corresponding path program 194 times [2020-10-09 10:40:23,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:23,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997460310] [2020-10-09 10:40:23,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:24,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997460310] [2020-10-09 10:40:24,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750688190] [2020-10-09 10:40:24,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:24,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:40:24,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:24,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:24,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:24,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:24,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:24,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002965590] [2020-10-09 10:40:24,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:24,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:24,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:24,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:24,326 INFO L87 Difference]: Start difference. First operand 277 states and 744 transitions. Second operand 17 states. [2020-10-09 10:40:25,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:25,238 INFO L93 Difference]: Finished difference Result 401 states and 1008 transitions. [2020-10-09 10:40:25,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:40:25,239 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:25,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:25,239 INFO L225 Difference]: With dead ends: 401 [2020-10-09 10:40:25,239 INFO L226 Difference]: Without dead ends: 397 [2020-10-09 10:40:25,240 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-09 10:40:25,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-10-09 10:40:25,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 276. [2020-10-09 10:40:25,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-09 10:40:25,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 741 transitions. [2020-10-09 10:40:25,245 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 741 transitions. Word has length 14 [2020-10-09 10:40:25,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:25,245 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 741 transitions. [2020-10-09 10:40:25,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:25,246 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 741 transitions. [2020-10-09 10:40:25,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:25,246 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:25,246 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:25,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-09 10:40:25,456 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:25,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:25,457 INFO L82 PathProgramCache]: Analyzing trace with hash 145133118, now seen corresponding path program 195 times [2020-10-09 10:40:25,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:25,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197933259] [2020-10-09 10:40:25,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:25,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197933259] [2020-10-09 10:40:25,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953068564] [2020-10-09 10:40:25,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:25,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:40:25,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:25,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:40:25,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:25,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:25,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:25,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142922328] [2020-10-09 10:40:25,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:25,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:25,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:25,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:25,836 INFO L87 Difference]: Start difference. First operand 276 states and 741 transitions. Second operand 17 states. [2020-10-09 10:40:26,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:26,932 INFO L93 Difference]: Finished difference Result 402 states and 1016 transitions. [2020-10-09 10:40:26,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-09 10:40:26,933 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:26,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:26,934 INFO L225 Difference]: With dead ends: 402 [2020-10-09 10:40:26,934 INFO L226 Difference]: Without dead ends: 398 [2020-10-09 10:40:26,934 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-09 10:40:26,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-10-09 10:40:26,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 277. [2020-10-09 10:40:26,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-09 10:40:26,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 743 transitions. [2020-10-09 10:40:26,938 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 743 transitions. Word has length 14 [2020-10-09 10:40:26,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:26,938 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 743 transitions. [2020-10-09 10:40:26,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:26,938 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 743 transitions. [2020-10-09 10:40:26,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:26,939 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:26,939 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:27,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-09 10:40:27,140 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:27,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:27,140 INFO L82 PathProgramCache]: Analyzing trace with hash 145155438, now seen corresponding path program 196 times [2020-10-09 10:40:27,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:27,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359788615] [2020-10-09 10:40:27,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:27,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359788615] [2020-10-09 10:40:27,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73386923] [2020-10-09 10:40:27,263 INFO L93 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:27,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:40:27,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:27,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:27,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:27,510 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:40:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:27,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:27,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:27,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365400047] [2020-10-09 10:40:27,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:27,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:27,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:27,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:27,539 INFO L87 Difference]: Start difference. First operand 277 states and 743 transitions. Second operand 17 states. [2020-10-09 10:40:29,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:29,076 INFO L93 Difference]: Finished difference Result 433 states and 1104 transitions. [2020-10-09 10:40:29,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 10:40:29,077 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:29,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:29,078 INFO L225 Difference]: With dead ends: 433 [2020-10-09 10:40:29,078 INFO L226 Difference]: Without dead ends: 427 [2020-10-09 10:40:29,078 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-10-09 10:40:29,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-10-09 10:40:29,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 275. [2020-10-09 10:40:29,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-09 10:40:29,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 736 transitions. [2020-10-09 10:40:29,083 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 736 transitions. Word has length 14 [2020-10-09 10:40:29,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:29,083 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 736 transitions. [2020-10-09 10:40:29,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:29,083 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 736 transitions. [2020-10-09 10:40:29,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:29,084 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:29,084 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:29,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-10-09 10:40:29,287 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:29,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:29,287 INFO L82 PathProgramCache]: Analyzing trace with hash 145184268, now seen corresponding path program 197 times [2020-10-09 10:40:29,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:29,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050088892] [2020-10-09 10:40:29,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:29,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050088892] [2020-10-09 10:40:29,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956066715] [2020-10-09 10:40:29,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:29,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:40:29,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:29,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:29,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:33,754 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:40:37,120 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 42 DAG size of output: 19 [2020-10-09 10:40:37,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:37,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:37,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-09 10:40:37,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634002487] [2020-10-09 10:40:37,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-09 10:40:37,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:37,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-09 10:40:37,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=220, Unknown=3, NotChecked=0, Total=306 [2020-10-09 10:40:37,123 INFO L87 Difference]: Start difference. First operand 275 states and 736 transitions. Second operand 18 states. [2020-10-09 10:40:41,306 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-09 10:40:45,803 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-09 10:40:46,320 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 23 [2020-10-09 10:40:52,701 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2020-10-09 10:40:54,878 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-09 10:41:11,689 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-10-09 10:41:16,064 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-10-09 10:41:52,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:41:52,288 INFO L93 Difference]: Finished difference Result 443 states and 1112 transitions. [2020-10-09 10:41:52,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 10:41:52,289 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-09 10:41:52,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:41:52,290 INFO L225 Difference]: With dead ends: 443 [2020-10-09 10:41:52,290 INFO L226 Difference]: Without dead ends: 437 [2020-10-09 10:41:52,291 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 52.4s TimeCoverageRelationStatistics Valid=560, Invalid=1408, Unknown=12, NotChecked=0, Total=1980 [2020-10-09 10:41:52,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-09 10:41:52,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 273. [2020-10-09 10:41:52,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-09 10:41:52,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 726 transitions. [2020-10-09 10:41:52,295 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 726 transitions. Word has length 14 [2020-10-09 10:41:52,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:41:52,296 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 726 transitions. [2020-10-09 10:41:52,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-09 10:41:52,296 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 726 transitions. [2020-10-09 10:41:52,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:41:52,296 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:41:52,296 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:41:52,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-09 10:41:52,497 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:41:52,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:41:52,498 INFO L82 PathProgramCache]: Analyzing trace with hash 146086430, now seen corresponding path program 198 times [2020-10-09 10:41:52,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:41:52,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350681257] [2020-10-09 10:41:52,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:41:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:41:52,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:52,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350681257] [2020-10-09 10:41:52,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163872547] [2020-10-09 10:41:52,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:52,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:41:52,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:41:52,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:41:52,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:41:52,843 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:52,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:41:52,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:41:52,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109491570] [2020-10-09 10:41:52,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:41:52,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:41:52,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:41:52,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:41:52,845 INFO L87 Difference]: Start difference. First operand 273 states and 726 transitions. Second operand 17 states. [2020-10-09 10:41:53,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:41:53,246 INFO L93 Difference]: Finished difference Result 351 states and 887 transitions. [2020-10-09 10:41:53,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:41:53,247 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:41:53,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:41:53,248 INFO L225 Difference]: With dead ends: 351 [2020-10-09 10:41:53,248 INFO L226 Difference]: Without dead ends: 338 [2020-10-09 10:41:53,248 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:41:53,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-10-09 10:41:53,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 274. [2020-10-09 10:41:53,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-09 10:41:53,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 727 transitions. [2020-10-09 10:41:53,253 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 727 transitions. Word has length 14 [2020-10-09 10:41:53,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:41:53,253 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 727 transitions. [2020-10-09 10:41:53,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:41:53,253 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 727 transitions. [2020-10-09 10:41:53,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:41:53,254 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:41:53,254 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:41:53,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2020-10-09 10:41:53,455 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:41:53,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:41:53,455 INFO L82 PathProgramCache]: Analyzing trace with hash 146108750, now seen corresponding path program 199 times [2020-10-09 10:41:53,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:41:53,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120409732] [2020-10-09 10:41:53,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:41:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:41:53,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:53,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120409732] [2020-10-09 10:41:53,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113197834] [2020-10-09 10:41:53,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:53,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:41:53,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:41:53,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:41:53,761 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:41:53,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:53,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:41:53,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:41:53,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5831032] [2020-10-09 10:41:53,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:41:53,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:41:53,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:41:53,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:41:53,780 INFO L87 Difference]: Start difference. First operand 274 states and 727 transitions. Second operand 17 states. [2020-10-09 10:41:54,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:41:54,262 INFO L93 Difference]: Finished difference Result 354 states and 891 transitions. [2020-10-09 10:41:54,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:41:54,263 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:41:54,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:41:54,264 INFO L225 Difference]: With dead ends: 354 [2020-10-09 10:41:54,264 INFO L226 Difference]: Without dead ends: 330 [2020-10-09 10:41:54,264 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:41:54,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-09 10:41:54,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 267. [2020-10-09 10:41:54,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-09 10:41:54,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 713 transitions. [2020-10-09 10:41:54,268 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 713 transitions. Word has length 14 [2020-10-09 10:41:54,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:41:54,268 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 713 transitions. [2020-10-09 10:41:54,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:41:54,268 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 713 transitions. [2020-10-09 10:41:54,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:41:54,269 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:41:54,269 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:41:54,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:54,469 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:41:54,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:41:54,470 INFO L82 PathProgramCache]: Analyzing trace with hash 2034084541, now seen corresponding path program 200 times [2020-10-09 10:41:54,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:41:54,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857970558] [2020-10-09 10:41:54,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:41:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:41:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:54,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857970558] [2020-10-09 10:41:54,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841960459] [2020-10-09 10:41:54,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:54,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:41:54,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:41:54,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:41:54,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:41:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:54,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:41:54,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:41:54,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573114176] [2020-10-09 10:41:54,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:41:54,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:41:54,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:41:54,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:41:54,899 INFO L87 Difference]: Start difference. First operand 267 states and 713 transitions. Second operand 17 states. [2020-10-09 10:41:55,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:41:55,493 INFO L93 Difference]: Finished difference Result 347 states and 876 transitions. [2020-10-09 10:41:55,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:41:55,495 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:41:55,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:41:55,496 INFO L225 Difference]: With dead ends: 347 [2020-10-09 10:41:55,497 INFO L226 Difference]: Without dead ends: 344 [2020-10-09 10:41:55,497 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:41:55,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-09 10:41:55,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 270. [2020-10-09 10:41:55,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-09 10:41:55,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 722 transitions. [2020-10-09 10:41:55,504 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 722 transitions. Word has length 14 [2020-10-09 10:41:55,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:41:55,504 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 722 transitions. [2020-10-09 10:41:55,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:41:55,504 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 722 transitions. [2020-10-09 10:41:55,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:41:55,505 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:41:55,505 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:41:55,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2020-10-09 10:41:55,718 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:41:55,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:41:55,719 INFO L82 PathProgramCache]: Analyzing trace with hash 2034085502, now seen corresponding path program 201 times [2020-10-09 10:41:55,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:41:55,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655400173] [2020-10-09 10:41:55,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:41:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:41:55,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:55,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655400173] [2020-10-09 10:41:55,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473826684] [2020-10-09 10:41:55,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:56,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:41:56,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:41:56,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:41:56,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:41:56,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:56,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:41:56,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:41:56,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552557187] [2020-10-09 10:41:56,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:41:56,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:41:56,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:41:56,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:41:56,365 INFO L87 Difference]: Start difference. First operand 270 states and 722 transitions. Second operand 17 states. [2020-10-09 10:41:57,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:41:57,086 INFO L93 Difference]: Finished difference Result 367 states and 918 transitions. [2020-10-09 10:41:57,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:41:57,088 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:41:57,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:41:57,119 INFO L225 Difference]: With dead ends: 367 [2020-10-09 10:41:57,119 INFO L226 Difference]: Without dead ends: 363 [2020-10-09 10:41:57,120 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:41:57,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-09 10:41:57,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 269. [2020-10-09 10:41:57,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-09 10:41:57,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 719 transitions. [2020-10-09 10:41:57,127 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 719 transitions. Word has length 14 [2020-10-09 10:41:57,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:41:57,127 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 719 transitions. [2020-10-09 10:41:57,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:41:57,128 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 719 transitions. [2020-10-09 10:41:57,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:41:57,129 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:41:57,129 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:41:57,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:57,341 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:41:57,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:41:57,342 INFO L82 PathProgramCache]: Analyzing trace with hash 2034114332, now seen corresponding path program 202 times [2020-10-09 10:41:57,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:41:57,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607528834] [2020-10-09 10:41:57,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:41:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:41:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:57,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607528834] [2020-10-09 10:41:57,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021192173] [2020-10-09 10:41:57,547 INFO L93 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:57,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:41:57,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:41:57,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:41:57,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:00,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:00,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:00,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:00,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579208955] [2020-10-09 10:42:00,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:00,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:00,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:00,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:00,854 INFO L87 Difference]: Start difference. First operand 269 states and 719 transitions. Second operand 17 states. [2020-10-09 10:42:01,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:01,495 INFO L93 Difference]: Finished difference Result 391 states and 972 transitions. [2020-10-09 10:42:01,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:42:01,496 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:01,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:01,497 INFO L225 Difference]: With dead ends: 391 [2020-10-09 10:42:01,497 INFO L226 Difference]: Without dead ends: 386 [2020-10-09 10:42:01,497 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:42:01,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-10-09 10:42:01,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 274. [2020-10-09 10:42:01,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-09 10:42:01,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 732 transitions. [2020-10-09 10:42:01,502 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 732 transitions. Word has length 14 [2020-10-09 10:42:01,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:01,502 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 732 transitions. [2020-10-09 10:42:01,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:01,502 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 732 transitions. [2020-10-09 10:42:01,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:01,503 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:01,503 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:01,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:01,703 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:01,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:01,704 INFO L82 PathProgramCache]: Analyzing trace with hash 2035009023, now seen corresponding path program 203 times [2020-10-09 10:42:01,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:01,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981112976] [2020-10-09 10:42:01,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:01,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981112976] [2020-10-09 10:42:01,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825135233] [2020-10-09 10:42:01,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:01,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:42:01,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:01,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:01,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:02,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:02,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:02,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035521014] [2020-10-09 10:42:02,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:02,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:02,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:02,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:02,088 INFO L87 Difference]: Start difference. First operand 274 states and 732 transitions. Second operand 17 states. [2020-10-09 10:42:02,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:02,536 INFO L93 Difference]: Finished difference Result 391 states and 967 transitions. [2020-10-09 10:42:02,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:42:02,537 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:02,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:02,538 INFO L225 Difference]: With dead ends: 391 [2020-10-09 10:42:02,538 INFO L226 Difference]: Without dead ends: 373 [2020-10-09 10:42:02,538 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:42:02,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-10-09 10:42:02,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 274. [2020-10-09 10:42:02,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-09 10:42:02,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 728 transitions. [2020-10-09 10:42:02,542 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 728 transitions. Word has length 14 [2020-10-09 10:42:02,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:02,542 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 728 transitions. [2020-10-09 10:42:02,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:02,542 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 728 transitions. [2020-10-09 10:42:02,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:02,543 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:02,543 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:02,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:02,744 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:02,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:02,744 INFO L82 PathProgramCache]: Analyzing trace with hash 2062713692, now seen corresponding path program 204 times [2020-10-09 10:42:02,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:02,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856386500] [2020-10-09 10:42:02,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:02,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:02,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856386500] [2020-10-09 10:42:02,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686510168] [2020-10-09 10:42:02,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:02,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:42:02,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:02,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:02,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:03,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:03,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:03,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:03,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036854841] [2020-10-09 10:42:03,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:03,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:03,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:03,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:03,137 INFO L87 Difference]: Start difference. First operand 274 states and 728 transitions. Second operand 17 states. [2020-10-09 10:42:03,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:03,622 INFO L93 Difference]: Finished difference Result 362 states and 910 transitions. [2020-10-09 10:42:03,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:42:03,623 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:03,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:03,624 INFO L225 Difference]: With dead ends: 362 [2020-10-09 10:42:03,624 INFO L226 Difference]: Without dead ends: 357 [2020-10-09 10:42:03,624 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:42:03,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-09 10:42:03,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 271. [2020-10-09 10:42:03,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-09 10:42:03,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 721 transitions. [2020-10-09 10:42:03,629 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 721 transitions. Word has length 14 [2020-10-09 10:42:03,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:03,629 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 721 transitions. [2020-10-09 10:42:03,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:03,630 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 721 transitions. [2020-10-09 10:42:03,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:03,630 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:03,630 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:03,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-09 10:42:03,835 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:03,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:03,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2063667004, now seen corresponding path program 205 times [2020-10-09 10:42:03,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:03,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461853224] [2020-10-09 10:42:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:04,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461853224] [2020-10-09 10:42:04,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49302316] [2020-10-09 10:42:04,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:04,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:04,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:04,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:04,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:04,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:04,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750205047] [2020-10-09 10:42:04,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:04,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:04,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:04,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:04,247 INFO L87 Difference]: Start difference. First operand 271 states and 721 transitions. Second operand 17 states. [2020-10-09 10:42:04,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:04,487 INFO L93 Difference]: Finished difference Result 339 states and 853 transitions. [2020-10-09 10:42:04,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:42:04,488 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:04,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:04,489 INFO L225 Difference]: With dead ends: 339 [2020-10-09 10:42:04,489 INFO L226 Difference]: Without dead ends: 326 [2020-10-09 10:42:04,490 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-10-09 10:42:04,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-09 10:42:04,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 265. [2020-10-09 10:42:04,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-09 10:42:04,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 709 transitions. [2020-10-09 10:42:04,493 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 709 transitions. Word has length 14 [2020-10-09 10:42:04,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:04,494 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 709 transitions. [2020-10-09 10:42:04,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:04,494 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 709 transitions. [2020-10-09 10:42:04,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:04,494 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:04,494 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:04,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-09 10:42:04,696 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:04,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:04,697 INFO L82 PathProgramCache]: Analyzing trace with hash 313362251, now seen corresponding path program 206 times [2020-10-09 10:42:04,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:04,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955294561] [2020-10-09 10:42:04,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:04,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955294561] [2020-10-09 10:42:04,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126743250] [2020-10-09 10:42:04,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:04,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:42:04,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:04,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:04,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:05,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:05,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:05,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362651279] [2020-10-09 10:42:05,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:05,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:05,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:05,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:05,093 INFO L87 Difference]: Start difference. First operand 265 states and 709 transitions. Second operand 17 states. [2020-10-09 10:42:05,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:05,480 INFO L93 Difference]: Finished difference Result 346 states and 872 transitions. [2020-10-09 10:42:05,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:42:05,482 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:05,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:05,482 INFO L225 Difference]: With dead ends: 346 [2020-10-09 10:42:05,482 INFO L226 Difference]: Without dead ends: 343 [2020-10-09 10:42:05,483 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:42:05,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-09 10:42:05,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 267. [2020-10-09 10:42:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-09 10:42:05,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 715 transitions. [2020-10-09 10:42:05,487 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 715 transitions. Word has length 14 [2020-10-09 10:42:05,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:05,487 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 715 transitions. [2020-10-09 10:42:05,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:05,487 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 715 transitions. [2020-10-09 10:42:05,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:05,487 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:05,487 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:05,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-10-09 10:42:05,688 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:05,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:05,689 INFO L82 PathProgramCache]: Analyzing trace with hash 313363212, now seen corresponding path program 207 times [2020-10-09 10:42:05,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:05,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100655218] [2020-10-09 10:42:05,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:05,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:05,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100655218] [2020-10-09 10:42:05,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696402114] [2020-10-09 10:42:05,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:05,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:42:05,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:05,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:05,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:06,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:06,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:06,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:06,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102383409] [2020-10-09 10:42:06,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:06,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:06,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:06,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:06,078 INFO L87 Difference]: Start difference. First operand 267 states and 715 transitions. Second operand 17 states. [2020-10-09 10:42:06,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:06,503 INFO L93 Difference]: Finished difference Result 361 states and 905 transitions. [2020-10-09 10:42:06,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:42:06,504 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:06,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:06,505 INFO L225 Difference]: With dead ends: 361 [2020-10-09 10:42:06,505 INFO L226 Difference]: Without dead ends: 357 [2020-10-09 10:42:06,505 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:42:06,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-09 10:42:06,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 266. [2020-10-09 10:42:06,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-09 10:42:06,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 712 transitions. [2020-10-09 10:42:06,509 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 712 transitions. Word has length 14 [2020-10-09 10:42:06,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:06,509 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 712 transitions. [2020-10-09 10:42:06,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:06,510 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 712 transitions. [2020-10-09 10:42:06,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:06,510 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:06,510 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:06,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-10-09 10:42:06,711 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:06,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:06,711 INFO L82 PathProgramCache]: Analyzing trace with hash 313392042, now seen corresponding path program 208 times [2020-10-09 10:42:06,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:06,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619942538] [2020-10-09 10:42:06,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:06,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619942538] [2020-10-09 10:42:06,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444518154] [2020-10-09 10:42:06,825 INFO L93 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:06,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:42:06,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:06,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:06,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:07,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:07,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:07,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662703314] [2020-10-09 10:42:07,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:07,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:07,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:07,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:07,300 INFO L87 Difference]: Start difference. First operand 266 states and 712 transitions. Second operand 17 states. [2020-10-09 10:42:07,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:07,994 INFO L93 Difference]: Finished difference Result 401 states and 990 transitions. [2020-10-09 10:42:07,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:42:07,995 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:07,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:07,996 INFO L225 Difference]: With dead ends: 401 [2020-10-09 10:42:07,996 INFO L226 Difference]: Without dead ends: 388 [2020-10-09 10:42:07,996 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:42:07,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-10-09 10:42:08,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 271. [2020-10-09 10:42:08,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-09 10:42:08,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 725 transitions. [2020-10-09 10:42:08,001 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 725 transitions. Word has length 14 [2020-10-09 10:42:08,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:08,001 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 725 transitions. [2020-10-09 10:42:08,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:08,001 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 725 transitions. [2020-10-09 10:42:08,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:08,001 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:08,002 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:08,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-10-09 10:42:08,202 INFO L429 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:08,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:08,203 INFO L82 PathProgramCache]: Analyzing trace with hash 314286733, now seen corresponding path program 209 times [2020-10-09 10:42:08,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:08,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851940425] [2020-10-09 10:42:08,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:08,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:08,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:08,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851940425] [2020-10-09 10:42:08,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859901671] [2020-10-09 10:42:08,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:08,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:42:08,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:08,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:08,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:08,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:08,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:08,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:08,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60744436] [2020-10-09 10:42:08,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:08,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:08,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:08,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:08,572 INFO L87 Difference]: Start difference. First operand 271 states and 725 transitions. Second operand 17 states. [2020-10-09 10:42:09,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:09,090 INFO L93 Difference]: Finished difference Result 381 states and 946 transitions. [2020-10-09 10:42:09,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 10:42:09,091 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:09,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:09,092 INFO L225 Difference]: With dead ends: 381 [2020-10-09 10:42:09,092 INFO L226 Difference]: Without dead ends: 363 [2020-10-09 10:42:09,092 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:42:09,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-09 10:42:09,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 270. [2020-10-09 10:42:09,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-09 10:42:09,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 719 transitions. [2020-10-09 10:42:09,097 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 719 transitions. Word has length 14 [2020-10-09 10:42:09,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:09,097 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 719 transitions. [2020-10-09 10:42:09,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:09,097 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 719 transitions. [2020-10-09 10:42:09,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:09,098 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:09,098 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:09,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2020-10-09 10:42:09,298 INFO L429 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:09,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:09,299 INFO L82 PathProgramCache]: Analyzing trace with hash 950591741, now seen corresponding path program 210 times [2020-10-09 10:42:09,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:09,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145388475] [2020-10-09 10:42:09,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:09,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:09,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145388475] [2020-10-09 10:42:09,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824263901] [2020-10-09 10:42:09,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:09,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-09 10:42:09,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:09,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:09,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:09,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:09,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:09,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146699251] [2020-10-09 10:42:09,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:09,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:09,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:09,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:09,670 INFO L87 Difference]: Start difference. First operand 270 states and 719 transitions. Second operand 17 states. [2020-10-09 10:42:10,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:10,203 INFO L93 Difference]: Finished difference Result 354 states and 884 transitions. [2020-10-09 10:42:10,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 10:42:10,204 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:10,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:10,205 INFO L225 Difference]: With dead ends: 354 [2020-10-09 10:42:10,205 INFO L226 Difference]: Without dead ends: 351 [2020-10-09 10:42:10,205 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:42:10,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-10-09 10:42:10,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 271. [2020-10-09 10:42:10,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-09 10:42:10,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 722 transitions. [2020-10-09 10:42:10,209 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 722 transitions. Word has length 14 [2020-10-09 10:42:10,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:10,210 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 722 transitions. [2020-10-09 10:42:10,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:10,210 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 722 transitions. [2020-10-09 10:42:10,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:10,210 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:10,210 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:10,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-10-09 10:42:10,411 INFO L429 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:10,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:10,411 INFO L82 PathProgramCache]: Analyzing trace with hash 950592702, now seen corresponding path program 211 times [2020-10-09 10:42:10,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:10,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899172399] [2020-10-09 10:42:10,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:10,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:10,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899172399] [2020-10-09 10:42:10,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889938138] [2020-10-09 10:42:10,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:10,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:10,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:10,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:10,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:10,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283771260] [2020-10-09 10:42:10,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:10,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:10,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:10,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:10,794 INFO L87 Difference]: Start difference. First operand 271 states and 722 transitions. Second operand 17 states. [2020-10-09 10:42:11,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:11,307 INFO L93 Difference]: Finished difference Result 359 states and 897 transitions. [2020-10-09 10:42:11,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:42:11,309 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:11,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:11,309 INFO L225 Difference]: With dead ends: 359 [2020-10-09 10:42:11,309 INFO L226 Difference]: Without dead ends: 355 [2020-10-09 10:42:11,309 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:42:11,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-10-09 10:42:11,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 270. [2020-10-09 10:42:11,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-09 10:42:11,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 719 transitions. [2020-10-09 10:42:11,314 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 719 transitions. Word has length 14 [2020-10-09 10:42:11,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:11,314 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 719 transitions. [2020-10-09 10:42:11,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:11,314 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 719 transitions. [2020-10-09 10:42:11,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:11,315 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:11,315 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:11,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2020-10-09 10:42:11,515 INFO L429 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:11,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:11,516 INFO L82 PathProgramCache]: Analyzing trace with hash 950621532, now seen corresponding path program 212 times [2020-10-09 10:42:11,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:11,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012213709] [2020-10-09 10:42:11,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:11,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:11,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012213709] [2020-10-09 10:42:11,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94662358] [2020-10-09 10:42:11,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:11,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:42:11,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:11,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:11,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:11,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:11,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:11,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515338840] [2020-10-09 10:42:11,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:11,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:11,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:11,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:11,963 INFO L87 Difference]: Start difference. First operand 270 states and 719 transitions. Second operand 17 states. [2020-10-09 10:42:12,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:12,746 INFO L93 Difference]: Finished difference Result 386 states and 956 transitions. [2020-10-09 10:42:12,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:42:12,747 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:12,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:12,747 INFO L225 Difference]: With dead ends: 386 [2020-10-09 10:42:12,747 INFO L226 Difference]: Without dead ends: 381 [2020-10-09 10:42:12,748 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:42:12,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-10-09 10:42:12,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 269. [2020-10-09 10:42:12,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-09 10:42:12,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 715 transitions. [2020-10-09 10:42:12,752 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 715 transitions. Word has length 14 [2020-10-09 10:42:12,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:12,752 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 715 transitions. [2020-10-09 10:42:12,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:12,752 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 715 transitions. [2020-10-09 10:42:12,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:12,753 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:12,753 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:12,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:12,953 INFO L429 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:12,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:12,954 INFO L82 PathProgramCache]: Analyzing trace with hash 971147531, now seen corresponding path program 213 times [2020-10-09 10:42:12,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:12,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30555491] [2020-10-09 10:42:12,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:13,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30555491] [2020-10-09 10:42:13,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415750678] [2020-10-09 10:42:13,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:13,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-09 10:42:13,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:13,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:13,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:13,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:13,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:13,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927862579] [2020-10-09 10:42:13,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:13,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:13,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:13,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:13,328 INFO L87 Difference]: Start difference. First operand 269 states and 715 transitions. Second operand 17 states. [2020-10-09 10:42:13,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:13,998 INFO L93 Difference]: Finished difference Result 348 states and 872 transitions. [2020-10-09 10:42:13,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 10:42:13,999 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:13,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:14,000 INFO L225 Difference]: With dead ends: 348 [2020-10-09 10:42:14,000 INFO L226 Difference]: Without dead ends: 345 [2020-10-09 10:42:14,000 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2020-10-09 10:42:14,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-09 10:42:14,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 269. [2020-10-09 10:42:14,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-09 10:42:14,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 715 transitions. [2020-10-09 10:42:14,005 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 715 transitions. Word has length 14 [2020-10-09 10:42:14,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:14,005 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 715 transitions. [2020-10-09 10:42:14,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:14,005 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 715 transitions. [2020-10-09 10:42:14,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:14,005 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:14,006 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:14,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:14,206 INFO L429 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:14,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:14,207 INFO L82 PathProgramCache]: Analyzing trace with hash 971148492, now seen corresponding path program 214 times [2020-10-09 10:42:14,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:14,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888015101] [2020-10-09 10:42:14,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:14,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888015101] [2020-10-09 10:42:14,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004038985] [2020-10-09 10:42:14,325 INFO L93 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:14,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:42:14,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:14,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:14,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:14,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:14,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:14,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690962699] [2020-10-09 10:42:14,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:14,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:14,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:14,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:14,594 INFO L87 Difference]: Start difference. First operand 269 states and 715 transitions. Second operand 17 states. [2020-10-09 10:42:15,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:15,252 INFO L93 Difference]: Finished difference Result 350 states and 873 transitions. [2020-10-09 10:42:15,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 10:42:15,253 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:15,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:15,254 INFO L225 Difference]: With dead ends: 350 [2020-10-09 10:42:15,254 INFO L226 Difference]: Without dead ends: 346 [2020-10-09 10:42:15,255 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=277, Invalid=715, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:42:15,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-09 10:42:15,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 269. [2020-10-09 10:42:15,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-09 10:42:15,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 714 transitions. [2020-10-09 10:42:15,259 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 714 transitions. Word has length 14 [2020-10-09 10:42:15,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:15,259 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 714 transitions. [2020-10-09 10:42:15,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:15,259 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 714 transitions. [2020-10-09 10:42:15,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:15,260 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:15,260 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:15,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:15,471 INFO L429 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:15,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:15,471 INFO L82 PathProgramCache]: Analyzing trace with hash 971810621, now seen corresponding path program 215 times [2020-10-09 10:42:15,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:15,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160055667] [2020-10-09 10:42:15,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:15,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:15,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160055667] [2020-10-09 10:42:15,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238195619] [2020-10-09 10:42:15,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:15,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-09 10:42:15,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:15,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:15,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:15,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:15,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:15,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254341928] [2020-10-09 10:42:15,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:15,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:15,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:15,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:15,838 INFO L87 Difference]: Start difference. First operand 269 states and 714 transitions. Second operand 17 states. [2020-10-09 10:42:16,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:16,594 INFO L93 Difference]: Finished difference Result 334 states and 840 transitions. [2020-10-09 10:42:16,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 10:42:16,595 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:16,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:16,596 INFO L225 Difference]: With dead ends: 334 [2020-10-09 10:42:16,596 INFO L226 Difference]: Without dead ends: 331 [2020-10-09 10:42:16,596 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=324, Invalid=798, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:42:16,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-09 10:42:16,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 269. [2020-10-09 10:42:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-09 10:42:16,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 713 transitions. [2020-10-09 10:42:16,600 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 713 transitions. Word has length 14 [2020-10-09 10:42:16,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:16,600 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 713 transitions. [2020-10-09 10:42:16,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:16,600 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 713 transitions. [2020-10-09 10:42:16,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:16,600 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:16,600 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:16,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-10-09 10:42:16,801 INFO L429 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:16,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:16,802 INFO L82 PathProgramCache]: Analyzing trace with hash 971831980, now seen corresponding path program 216 times [2020-10-09 10:42:16,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:16,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529872588] [2020-10-09 10:42:16,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:16,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529872588] [2020-10-09 10:42:16,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107616563] [2020-10-09 10:42:16,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:16,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:42:16,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:16,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:16,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:17,138 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:42:17,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:17,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:17,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:17,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39895592] [2020-10-09 10:42:17,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:17,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:17,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:17,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:17,157 INFO L87 Difference]: Start difference. First operand 269 states and 713 transitions. Second operand 17 states. [2020-10-09 10:42:17,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:17,639 INFO L93 Difference]: Finished difference Result 284 states and 731 transitions. [2020-10-09 10:42:17,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:42:17,641 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:17,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:17,641 INFO L225 Difference]: With dead ends: 284 [2020-10-09 10:42:17,641 INFO L226 Difference]: Without dead ends: 274 [2020-10-09 10:42:17,642 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:42:17,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-09 10:42:17,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 261. [2020-10-09 10:42:17,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-09 10:42:17,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 686 transitions. [2020-10-09 10:42:17,646 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 686 transitions. Word has length 14 [2020-10-09 10:42:17,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:17,646 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 686 transitions. [2020-10-09 10:42:17,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:17,646 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 686 transitions. [2020-10-09 10:42:17,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:17,646 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:17,647 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:17,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:17,847 INFO L429 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:17,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:17,848 INFO L82 PathProgramCache]: Analyzing trace with hash 971832941, now seen corresponding path program 217 times [2020-10-09 10:42:17,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:17,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057676014] [2020-10-09 10:42:17,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:17,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057676014] [2020-10-09 10:42:17,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572968677] [2020-10-09 10:42:17,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:18,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:18,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:18,208 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:42:18,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:18,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:18,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:18,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276692083] [2020-10-09 10:42:18,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:18,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:18,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:18,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:18,261 INFO L87 Difference]: Start difference. First operand 261 states and 686 transitions. Second operand 17 states. [2020-10-09 10:42:19,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:19,254 INFO L93 Difference]: Finished difference Result 365 states and 917 transitions. [2020-10-09 10:42:19,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:42:19,256 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:19,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:19,256 INFO L225 Difference]: With dead ends: 365 [2020-10-09 10:42:19,257 INFO L226 Difference]: Without dead ends: 360 [2020-10-09 10:42:19,257 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2020-10-09 10:42:19,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-10-09 10:42:19,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 259. [2020-10-09 10:42:19,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-09 10:42:19,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 680 transitions. [2020-10-09 10:42:19,261 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 680 transitions. Word has length 14 [2020-10-09 10:42:19,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:19,261 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 680 transitions. [2020-10-09 10:42:19,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:19,262 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 680 transitions. [2020-10-09 10:42:19,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:19,262 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:19,262 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:19,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-10-09 10:42:19,463 INFO L429 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:19,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:19,463 INFO L82 PathProgramCache]: Analyzing trace with hash 971840412, now seen corresponding path program 218 times [2020-10-09 10:42:19,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:19,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801877270] [2020-10-09 10:42:19,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:19,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801877270] [2020-10-09 10:42:19,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904542039] [2020-10-09 10:42:19,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:19,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:42:19,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:19,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:19,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:19,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:19,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:19,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527734965] [2020-10-09 10:42:19,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:19,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:19,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:19,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:19,890 INFO L87 Difference]: Start difference. First operand 259 states and 680 transitions. Second operand 17 states. [2020-10-09 10:42:20,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:20,679 INFO L93 Difference]: Finished difference Result 357 states and 889 transitions. [2020-10-09 10:42:20,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-09 10:42:20,680 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:20,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:20,681 INFO L225 Difference]: With dead ends: 357 [2020-10-09 10:42:20,681 INFO L226 Difference]: Without dead ends: 353 [2020-10-09 10:42:20,682 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2020-10-09 10:42:20,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-10-09 10:42:20,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 261. [2020-10-09 10:42:20,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-09 10:42:20,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 687 transitions. [2020-10-09 10:42:20,686 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 687 transitions. Word has length 14 [2020-10-09 10:42:20,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:20,686 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 687 transitions. [2020-10-09 10:42:20,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:20,686 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 687 transitions. [2020-10-09 10:42:20,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:20,686 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:20,686 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:20,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-10-09 10:42:20,887 INFO L429 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:20,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:20,888 INFO L82 PathProgramCache]: Analyzing trace with hash 971861771, now seen corresponding path program 219 times [2020-10-09 10:42:20,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:20,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379317953] [2020-10-09 10:42:20,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:21,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379317953] [2020-10-09 10:42:21,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037058074] [2020-10-09 10:42:21,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:21,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:42:21,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:21,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:21,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:21,245 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:42:21,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:21,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:21,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:21,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155750301] [2020-10-09 10:42:21,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:21,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:21,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:21,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:21,289 INFO L87 Difference]: Start difference. First operand 261 states and 687 transitions. Second operand 17 states. [2020-10-09 10:42:22,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:22,408 INFO L93 Difference]: Finished difference Result 385 states and 962 transitions. [2020-10-09 10:42:22,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:42:22,409 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:22,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:22,410 INFO L225 Difference]: With dead ends: 385 [2020-10-09 10:42:22,410 INFO L226 Difference]: Without dead ends: 380 [2020-10-09 10:42:22,410 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=419, Invalid=987, Unknown=0, NotChecked=0, Total=1406 [2020-10-09 10:42:22,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-09 10:42:22,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 261. [2020-10-09 10:42:22,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-09 10:42:22,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 687 transitions. [2020-10-09 10:42:22,420 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 687 transitions. Word has length 14 [2020-10-09 10:42:22,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:22,420 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 687 transitions. [2020-10-09 10:42:22,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:22,420 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 687 transitions. [2020-10-09 10:42:22,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:22,421 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:22,421 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:22,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:22,621 INFO L429 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:22,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:22,622 INFO L82 PathProgramCache]: Analyzing trace with hash 971862732, now seen corresponding path program 220 times [2020-10-09 10:42:22,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:22,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342100852] [2020-10-09 10:42:22,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:22,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342100852] [2020-10-09 10:42:22,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721581942] [2020-10-09 10:42:22,751 INFO L93 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:22,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:42:22,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:22,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:22,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:22,986 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:42:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:23,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:23,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:23,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238417630] [2020-10-09 10:42:23,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:23,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:23,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:23,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:23,013 INFO L87 Difference]: Start difference. First operand 261 states and 687 transitions. Second operand 17 states. [2020-10-09 10:42:24,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:24,179 INFO L93 Difference]: Finished difference Result 385 states and 962 transitions. [2020-10-09 10:42:24,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:42:24,181 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:24,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:24,181 INFO L225 Difference]: With dead ends: 385 [2020-10-09 10:42:24,181 INFO L226 Difference]: Without dead ends: 379 [2020-10-09 10:42:24,182 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=476, Invalid=1084, Unknown=0, NotChecked=0, Total=1560 [2020-10-09 10:42:24,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-10-09 10:42:24,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 257. [2020-10-09 10:42:24,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-09 10:42:24,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 674 transitions. [2020-10-09 10:42:24,186 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 674 transitions. Word has length 14 [2020-10-09 10:42:24,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:24,186 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 674 transitions. [2020-10-09 10:42:24,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:24,186 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 674 transitions. [2020-10-09 10:42:24,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:24,187 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:24,187 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:24,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:24,388 INFO L429 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:24,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:24,388 INFO L82 PathProgramCache]: Analyzing trace with hash 972071052, now seen corresponding path program 221 times [2020-10-09 10:42:24,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:24,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379974108] [2020-10-09 10:42:24,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:24,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379974108] [2020-10-09 10:42:24,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996777812] [2020-10-09 10:42:24,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:24,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:42:24,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:24,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:24,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:25,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:25,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:25,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:25,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143022963] [2020-10-09 10:42:25,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:25,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:25,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:25,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:25,805 INFO L87 Difference]: Start difference. First operand 257 states and 674 transitions. Second operand 17 states. [2020-10-09 10:42:26,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:26,823 INFO L93 Difference]: Finished difference Result 398 states and 973 transitions. [2020-10-09 10:42:26,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:42:26,825 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:26,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:26,825 INFO L225 Difference]: With dead ends: 398 [2020-10-09 10:42:26,826 INFO L226 Difference]: Without dead ends: 380 [2020-10-09 10:42:26,826 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2020-10-09 10:42:26,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-09 10:42:26,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 264. [2020-10-09 10:42:26,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-09 10:42:26,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 694 transitions. [2020-10-09 10:42:26,830 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 694 transitions. Word has length 14 [2020-10-09 10:42:26,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:26,830 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 694 transitions. [2020-10-09 10:42:26,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:26,830 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 694 transitions. [2020-10-09 10:42:26,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:26,831 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:26,831 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:27,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2020-10-09 10:42:27,032 INFO L429 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:27,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:27,032 INFO L82 PathProgramCache]: Analyzing trace with hash 972734142, now seen corresponding path program 222 times [2020-10-09 10:42:27,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:27,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749909639] [2020-10-09 10:42:27,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:27,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749909639] [2020-10-09 10:42:27,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643846989] [2020-10-09 10:42:27,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:27,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:42:27,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:27,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:27,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:27,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:27,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:27,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:27,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227416498] [2020-10-09 10:42:27,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:27,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:27,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:27,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:27,493 INFO L87 Difference]: Start difference. First operand 264 states and 694 transitions. Second operand 17 states. [2020-10-09 10:42:28,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:28,633 INFO L93 Difference]: Finished difference Result 380 states and 942 transitions. [2020-10-09 10:42:28,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:42:28,634 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:28,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:28,635 INFO L225 Difference]: With dead ends: 380 [2020-10-09 10:42:28,635 INFO L226 Difference]: Without dead ends: 375 [2020-10-09 10:42:28,636 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2020-10-09 10:42:28,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-10-09 10:42:28,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 268. [2020-10-09 10:42:28,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-09 10:42:28,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 708 transitions. [2020-10-09 10:42:28,641 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 708 transitions. Word has length 14 [2020-10-09 10:42:28,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:28,641 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 708 transitions. [2020-10-09 10:42:28,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:28,641 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 708 transitions. [2020-10-09 10:42:28,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:28,642 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:28,642 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:28,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:28,851 INFO L429 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:28,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:28,852 INFO L82 PathProgramCache]: Analyzing trace with hash 972755501, now seen corresponding path program 223 times [2020-10-09 10:42:28,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:28,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827597493] [2020-10-09 10:42:28,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:28,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:28,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:28,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827597493] [2020-10-09 10:42:28,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375076853] [2020-10-09 10:42:28,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:29,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:29,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:29,214 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:42:29,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:29,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:29,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:29,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304975556] [2020-10-09 10:42:29,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:29,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:29,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:29,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:29,266 INFO L87 Difference]: Start difference. First operand 268 states and 708 transitions. Second operand 17 states. [2020-10-09 10:42:30,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:30,761 INFO L93 Difference]: Finished difference Result 376 states and 942 transitions. [2020-10-09 10:42:30,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 10:42:30,762 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:30,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:30,763 INFO L225 Difference]: With dead ends: 376 [2020-10-09 10:42:30,763 INFO L226 Difference]: Without dead ends: 367 [2020-10-09 10:42:30,763 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=528, Invalid=1278, Unknown=0, NotChecked=0, Total=1806 [2020-10-09 10:42:30,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-10-09 10:42:30,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 270. [2020-10-09 10:42:30,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-09 10:42:30,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 718 transitions. [2020-10-09 10:42:30,767 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 718 transitions. Word has length 14 [2020-10-09 10:42:30,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:30,768 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 718 transitions. [2020-10-09 10:42:30,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:30,768 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 718 transitions. [2020-10-09 10:42:30,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:30,768 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:30,768 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:30,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable251 [2020-10-09 10:42:30,969 INFO L429 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:30,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:30,970 INFO L82 PathProgramCache]: Analyzing trace with hash 972756462, now seen corresponding path program 224 times [2020-10-09 10:42:30,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:30,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834177641] [2020-10-09 10:42:30,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:31,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:31,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834177641] [2020-10-09 10:42:31,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957768082] [2020-10-09 10:42:31,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:31,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:42:31,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:31,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:31,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:35,486 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:42:35,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:35,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:35,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:35,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038268554] [2020-10-09 10:42:35,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:35,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:35,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:35,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=190, Unknown=2, NotChecked=0, Total=272 [2020-10-09 10:42:35,570 INFO L87 Difference]: Start difference. First operand 270 states and 718 transitions. Second operand 17 states. [2020-10-09 10:42:40,372 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-09 10:42:44,517 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-09 10:42:48,758 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-09 10:42:53,004 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-10-09 10:42:55,096 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-09 10:43:01,633 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-09 10:43:02,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:02,323 INFO L93 Difference]: Finished difference Result 424 states and 1059 transitions. [2020-10-09 10:43:02,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-09 10:43:02,324 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:43:02,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:02,325 INFO L225 Difference]: With dead ends: 424 [2020-10-09 10:43:02,325 INFO L226 Difference]: Without dead ends: 414 [2020-10-09 10:43:02,325 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=530, Invalid=1274, Unknown=2, NotChecked=0, Total=1806 [2020-10-09 10:43:02,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-10-09 10:43:02,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 264. [2020-10-09 10:43:02,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-09 10:43:02,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 700 transitions. [2020-10-09 10:43:02,329 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 700 transitions. Word has length 14 [2020-10-09 10:43:02,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:02,330 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 700 transitions. [2020-10-09 10:43:02,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:43:02,330 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 700 transitions. [2020-10-09 10:43:02,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:02,330 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:02,330 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:02,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:02,531 INFO L429 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:02,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:02,532 INFO L82 PathProgramCache]: Analyzing trace with hash 972785292, now seen corresponding path program 225 times [2020-10-09 10:43:02,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:02,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816311345] [2020-10-09 10:43:02,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:02,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:02,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816311345] [2020-10-09 10:43:02,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739758871] [2020-10-09 10:43:02,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:02,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:43:02,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:02,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:02,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:02,926 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:43:02,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:02,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:02,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:43:02,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840712431] [2020-10-09 10:43:02,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:43:02,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:02,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:43:02,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:43:02,956 INFO L87 Difference]: Start difference. First operand 264 states and 700 transitions. Second operand 17 states. [2020-10-09 10:43:04,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:04,768 INFO L93 Difference]: Finished difference Result 424 states and 1057 transitions. [2020-10-09 10:43:04,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 10:43:04,769 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:43:04,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:04,770 INFO L225 Difference]: With dead ends: 424 [2020-10-09 10:43:04,770 INFO L226 Difference]: Without dead ends: 414 [2020-10-09 10:43:04,771 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-10-09 10:43:04,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-10-09 10:43:04,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 263. [2020-10-09 10:43:04,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-09 10:43:04,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 696 transitions. [2020-10-09 10:43:04,776 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 696 transitions. Word has length 14 [2020-10-09 10:43:04,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:04,776 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 696 transitions. [2020-10-09 10:43:04,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:43:04,776 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 696 transitions. [2020-10-09 10:43:04,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:04,776 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:04,777 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:04,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:04,977 INFO L429 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:04,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:04,978 INFO L82 PathProgramCache]: Analyzing trace with hash 979221853, now seen corresponding path program 226 times [2020-10-09 10:43:04,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:04,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803845139] [2020-10-09 10:43:04,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:04,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:05,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:05,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803845139] [2020-10-09 10:43:05,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779547170] [2020-10-09 10:43:05,110 INFO L93 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:05,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:43:05,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:05,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:05,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:05,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:05,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:43:05,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622818678] [2020-10-09 10:43:05,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:43:05,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:05,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:43:05,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:43:05,375 INFO L87 Difference]: Start difference. First operand 263 states and 696 transitions. Second operand 17 states. [2020-10-09 10:43:06,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:06,042 INFO L93 Difference]: Finished difference Result 374 states and 921 transitions. [2020-10-09 10:43:06,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 10:43:06,044 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:43:06,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:06,045 INFO L225 Difference]: With dead ends: 374 [2020-10-09 10:43:06,045 INFO L226 Difference]: Without dead ends: 360 [2020-10-09 10:43:06,045 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:43:06,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-10-09 10:43:06,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 263. [2020-10-09 10:43:06,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-09 10:43:06,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 696 transitions. [2020-10-09 10:43:06,049 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 696 transitions. Word has length 14 [2020-10-09 10:43:06,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:06,049 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 696 transitions. [2020-10-09 10:43:06,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:43:06,049 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 696 transitions. [2020-10-09 10:43:06,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:06,050 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:06,050 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:06,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:06,256 INFO L429 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:06,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:06,257 INFO L82 PathProgramCache]: Analyzing trace with hash 999776682, now seen corresponding path program 227 times [2020-10-09 10:43:06,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:06,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700855745] [2020-10-09 10:43:06,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:06,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:06,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:06,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700855745] [2020-10-09 10:43:06,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743988365] [2020-10-09 10:43:06,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:06,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:43:06,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:06,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:06,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:06,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:06,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:06,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:43:06,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030436284] [2020-10-09 10:43:06,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:43:06,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:06,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:43:06,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:43:06,663 INFO L87 Difference]: Start difference. First operand 263 states and 696 transitions. Second operand 17 states. [2020-10-09 10:43:07,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:07,691 INFO L93 Difference]: Finished difference Result 399 states and 977 transitions. [2020-10-09 10:43:07,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-09 10:43:07,703 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:43:07,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:07,704 INFO L225 Difference]: With dead ends: 399 [2020-10-09 10:43:07,704 INFO L226 Difference]: Without dead ends: 394 [2020-10-09 10:43:07,704 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=389, Invalid=943, Unknown=0, NotChecked=0, Total=1332 [2020-10-09 10:43:07,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-10-09 10:43:07,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 256. [2020-10-09 10:43:07,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-09 10:43:07,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 681 transitions. [2020-10-09 10:43:07,709 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 681 transitions. Word has length 14 [2020-10-09 10:43:07,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:07,709 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 681 transitions. [2020-10-09 10:43:07,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:43:07,709 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 681 transitions. [2020-10-09 10:43:07,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:07,710 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:07,710 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:07,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-10-09 10:43:07,920 INFO L429 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:07,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:07,921 INFO L82 PathProgramCache]: Analyzing trace with hash 999777643, now seen corresponding path program 228 times [2020-10-09 10:43:07,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:07,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892493493] [2020-10-09 10:43:07,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:08,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892493493] [2020-10-09 10:43:08,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472112975] [2020-10-09 10:43:08,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:08,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:43:08,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:08,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:08,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:08,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:08,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:08,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:43:08,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345410601] [2020-10-09 10:43:08,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:43:08,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:08,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:43:08,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:43:08,313 INFO L87 Difference]: Start difference. First operand 256 states and 681 transitions. Second operand 17 states. [2020-10-09 10:43:09,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:09,169 INFO L93 Difference]: Finished difference Result 396 states and 966 transitions. [2020-10-09 10:43:09,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:43:09,171 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:43:09,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:09,172 INFO L225 Difference]: With dead ends: 396 [2020-10-09 10:43:09,172 INFO L226 Difference]: Without dead ends: 382 [2020-10-09 10:43:09,172 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=316, Invalid=806, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:43:09,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-10-09 10:43:09,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 254. [2020-10-09 10:43:09,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-09 10:43:09,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 675 transitions. [2020-10-09 10:43:09,176 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 675 transitions. Word has length 14 [2020-10-09 10:43:09,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:09,176 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 675 transitions. [2020-10-09 10:43:09,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:43:09,176 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 675 transitions. [2020-10-09 10:43:09,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:09,177 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:09,177 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:09,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-10-09 10:43:09,378 INFO L429 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:09,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:09,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1000439772, now seen corresponding path program 229 times [2020-10-09 10:43:09,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:09,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299947975] [2020-10-09 10:43:09,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:09,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299947975] [2020-10-09 10:43:09,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5290199] [2020-10-09 10:43:09,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:09,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:09,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:09,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:09,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:09,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:43:09,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700319677] [2020-10-09 10:43:09,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:43:09,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:09,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:43:09,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:43:09,867 INFO L87 Difference]: Start difference. First operand 254 states and 675 transitions. Second operand 17 states. [2020-10-09 10:43:11,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:11,135 INFO L93 Difference]: Finished difference Result 380 states and 942 transitions. [2020-10-09 10:43:11,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-09 10:43:11,136 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:43:11,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:11,137 INFO L225 Difference]: With dead ends: 380 [2020-10-09 10:43:11,137 INFO L226 Difference]: Without dead ends: 375 [2020-10-09 10:43:11,137 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2020-10-09 10:43:11,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-10-09 10:43:11,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 256. [2020-10-09 10:43:11,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-09 10:43:11,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 681 transitions. [2020-10-09 10:43:11,141 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 681 transitions. Word has length 14 [2020-10-09 10:43:11,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:11,141 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 681 transitions. [2020-10-09 10:43:11,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:43:11,142 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 681 transitions. [2020-10-09 10:43:11,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:11,142 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:11,142 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:11,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2020-10-09 10:43:11,344 INFO L429 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:11,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:11,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1000461131, now seen corresponding path program 230 times [2020-10-09 10:43:11,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:11,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505996860] [2020-10-09 10:43:11,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:11,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:11,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505996860] [2020-10-09 10:43:11,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569305219] [2020-10-09 10:43:11,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:11,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:43:11,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:11,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:11,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:11,686 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:43:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:11,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:11,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:43:11,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987288495] [2020-10-09 10:43:11,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:43:11,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:11,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:43:11,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:43:11,709 INFO L87 Difference]: Start difference. First operand 256 states and 681 transitions. Second operand 17 states. [2020-10-09 10:43:12,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:12,736 INFO L93 Difference]: Finished difference Result 352 states and 887 transitions. [2020-10-09 10:43:12,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 10:43:12,737 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:43:12,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:12,738 INFO L225 Difference]: With dead ends: 352 [2020-10-09 10:43:12,738 INFO L226 Difference]: Without dead ends: 342 [2020-10-09 10:43:12,738 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=482, Invalid=1240, Unknown=0, NotChecked=0, Total=1722 [2020-10-09 10:43:12,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-10-09 10:43:12,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 253. [2020-10-09 10:43:12,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-09 10:43:12,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 667 transitions. [2020-10-09 10:43:12,742 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 667 transitions. Word has length 14 [2020-10-09 10:43:12,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:12,743 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 667 transitions. [2020-10-09 10:43:12,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:43:12,743 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 667 transitions. [2020-10-09 10:43:12,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:12,743 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:12,743 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:12,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-10-09 10:43:12,944 INFO L429 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:12,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:12,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1000462092, now seen corresponding path program 231 times [2020-10-09 10:43:12,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:12,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106391624] [2020-10-09 10:43:12,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:13,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106391624] [2020-10-09 10:43:13,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451682502] [2020-10-09 10:43:13,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:13,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:43:13,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:13,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:13,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:13,329 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:43:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:13,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:13,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:43:13,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013289112] [2020-10-09 10:43:13,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:43:13,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:13,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:43:13,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:43:13,385 INFO L87 Difference]: Start difference. First operand 253 states and 667 transitions. Second operand 17 states. [2020-10-09 10:43:14,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:14,695 INFO L93 Difference]: Finished difference Result 421 states and 1043 transitions. [2020-10-09 10:43:14,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-09 10:43:14,696 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:43:14,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:14,697 INFO L225 Difference]: With dead ends: 421 [2020-10-09 10:43:14,697 INFO L226 Difference]: Without dead ends: 410 [2020-10-09 10:43:14,697 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-10-09 10:43:14,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-10-09 10:43:14,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 249. [2020-10-09 10:43:14,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-09 10:43:14,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 653 transitions. [2020-10-09 10:43:14,701 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 653 transitions. Word has length 14 [2020-10-09 10:43:14,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:14,702 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 653 transitions. [2020-10-09 10:43:14,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:43:14,702 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 653 transitions. [2020-10-09 10:43:14,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:14,702 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:14,702 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:14,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2020-10-09 10:43:14,903 INFO L429 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:14,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:14,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1000469563, now seen corresponding path program 232 times [2020-10-09 10:43:14,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:14,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469526100] [2020-10-09 10:43:14,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:15,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469526100] [2020-10-09 10:43:15,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932517551] [2020-10-09 10:43:15,043 INFO L93 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:15,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:43:15,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:15,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:15,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:15,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:15,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:43:15,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026658747] [2020-10-09 10:43:15,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:43:15,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:15,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:43:15,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:43:15,292 INFO L87 Difference]: Start difference. First operand 249 states and 653 transitions. Second operand 17 states. [2020-10-09 10:43:16,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:16,265 INFO L93 Difference]: Finished difference Result 402 states and 976 transitions. [2020-10-09 10:43:16,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-09 10:43:16,266 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:43:16,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:16,267 INFO L225 Difference]: With dead ends: 402 [2020-10-09 10:43:16,267 INFO L226 Difference]: Without dead ends: 389 [2020-10-09 10:43:16,267 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=412, Invalid=994, Unknown=0, NotChecked=0, Total=1406 [2020-10-09 10:43:16,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-10-09 10:43:16,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 251. [2020-10-09 10:43:16,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-09 10:43:16,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 658 transitions. [2020-10-09 10:43:16,271 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 658 transitions. Word has length 14 [2020-10-09 10:43:16,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:16,272 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 658 transitions. [2020-10-09 10:43:16,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:43:16,272 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 658 transitions. [2020-10-09 10:43:16,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:16,272 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:16,272 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:16,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:16,473 INFO L429 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:16,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:16,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1000490922, now seen corresponding path program 233 times [2020-10-09 10:43:16,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:16,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742910377] [2020-10-09 10:43:16,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:16,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742910377] [2020-10-09 10:43:16,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239300075] [2020-10-09 10:43:16,618 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:16,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:43:16,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:16,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:16,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:16,843 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:43:16,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:16,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:16,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:43:16,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403579257] [2020-10-09 10:43:16,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:43:16,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:16,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:43:16,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:43:16,862 INFO L87 Difference]: Start difference. First operand 251 states and 658 transitions. Second operand 17 states. [2020-10-09 10:43:18,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:18,012 INFO L93 Difference]: Finished difference Result 422 states and 1042 transitions. [2020-10-09 10:43:18,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-09 10:43:18,014 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:43:18,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:18,015 INFO L225 Difference]: With dead ends: 422 [2020-10-09 10:43:18,015 INFO L226 Difference]: Without dead ends: 411 [2020-10-09 10:43:18,016 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-10-09 10:43:18,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-09 10:43:18,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 249. [2020-10-09 10:43:18,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-09 10:43:18,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 648 transitions. [2020-10-09 10:43:18,019 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 648 transitions. Word has length 14 [2020-10-09 10:43:18,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:18,020 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 648 transitions. [2020-10-09 10:43:18,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:43:18,020 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 648 transitions. [2020-10-09 10:43:18,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:18,020 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:18,020 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:18,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:18,221 INFO L429 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:18,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:18,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1000491883, now seen corresponding path program 234 times [2020-10-09 10:43:18,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:18,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580375337] [2020-10-09 10:43:18,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:18,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:18,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:18,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580375337] [2020-10-09 10:43:18,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280347867] [2020-10-09 10:43:18,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:18,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:43:18,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:18,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:18,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:18,646 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:43:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:18,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:18,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:43:18,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110707789] [2020-10-09 10:43:18,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:43:18,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:18,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:43:18,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:43:18,670 INFO L87 Difference]: Start difference. First operand 249 states and 648 transitions. Second operand 17 states. [2020-10-09 10:43:20,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:20,028 INFO L93 Difference]: Finished difference Result 424 states and 1036 transitions. [2020-10-09 10:43:20,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 10:43:20,036 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:43:20,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:20,036 INFO L225 Difference]: With dead ends: 424 [2020-10-09 10:43:20,036 INFO L226 Difference]: Without dead ends: 396 [2020-10-09 10:43:20,037 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-10-09 10:43:20,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-10-09 10:43:20,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 238. [2020-10-09 10:43:20,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-09 10:43:20,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 612 transitions. [2020-10-09 10:43:20,041 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 612 transitions. Word has length 14 [2020-10-09 10:43:20,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:20,041 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 612 transitions. [2020-10-09 10:43:20,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:43:20,041 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 612 transitions. [2020-10-09 10:43:20,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:20,041 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:20,041 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:20,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:20,242 INFO L429 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:20,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:20,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1001384652, now seen corresponding path program 235 times [2020-10-09 10:43:20,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:20,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087547039] [2020-10-09 10:43:20,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:20,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:20,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087547039] [2020-10-09 10:43:20,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054266433] [2020-10-09 10:43:20,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:20,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:20,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:20,639 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:43:20,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:20,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:20,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:43:20,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903056924] [2020-10-09 10:43:20,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:43:20,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:20,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:43:20,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:43:20,660 INFO L87 Difference]: Start difference. First operand 238 states and 612 transitions. Second operand 17 states. [2020-10-09 10:43:22,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:22,161 INFO L93 Difference]: Finished difference Result 369 states and 896 transitions. [2020-10-09 10:43:22,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 10:43:22,162 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:43:22,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:22,163 INFO L225 Difference]: With dead ends: 369 [2020-10-09 10:43:22,163 INFO L226 Difference]: Without dead ends: 359 [2020-10-09 10:43:22,163 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-10-09 10:43:22,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-09 10:43:22,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 228. [2020-10-09 10:43:22,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-09 10:43:22,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 568 transitions. [2020-10-09 10:43:22,168 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 568 transitions. Word has length 14 [2020-10-09 10:43:22,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:22,169 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 568 transitions. [2020-10-09 10:43:22,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:43:22,169 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 568 transitions. [2020-10-09 10:43:22,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:22,169 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:22,169 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:22,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable263 [2020-10-09 10:43:22,379 INFO L429 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:22,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:22,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1866754364, now seen corresponding path program 236 times [2020-10-09 10:43:22,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:22,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287451700] [2020-10-09 10:43:22,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:22,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:22,560 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:22,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287451700] [2020-10-09 10:43:22,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423987567] [2020-10-09 10:43:22,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:22,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:43:22,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:22,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:22,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:22,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:22,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:43:22,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826179869] [2020-10-09 10:43:22,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:43:22,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:22,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:43:22,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:43:22,869 INFO L87 Difference]: Start difference. First operand 228 states and 568 transitions. Second operand 17 states. [2020-10-09 10:43:23,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:23,250 INFO L93 Difference]: Finished difference Result 304 states and 714 transitions. [2020-10-09 10:43:23,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:43:23,252 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:43:23,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:23,252 INFO L225 Difference]: With dead ends: 304 [2020-10-09 10:43:23,253 INFO L226 Difference]: Without dead ends: 291 [2020-10-09 10:43:23,253 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:43:23,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-09 10:43:23,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 226. [2020-10-09 10:43:23,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-09 10:43:23,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 564 transitions. [2020-10-09 10:43:23,256 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 564 transitions. Word has length 14 [2020-10-09 10:43:23,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:23,256 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 564 transitions. [2020-10-09 10:43:23,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:43:23,257 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 564 transitions. [2020-10-09 10:43:23,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:23,257 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:23,257 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:23,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:23,458 INFO L429 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:23,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:23,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1888203884, now seen corresponding path program 237 times [2020-10-09 10:43:23,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:23,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224955198] [2020-10-09 10:43:23,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:23,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:23,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224955198] [2020-10-09 10:43:23,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403002138] [2020-10-09 10:43:23,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:23,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:43:23,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:23,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:23,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:23,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:23,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:43:23,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401166100] [2020-10-09 10:43:23,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:43:23,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:23,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:43:23,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:43:23,889 INFO L87 Difference]: Start difference. First operand 226 states and 564 transitions. Second operand 17 states. [2020-10-09 10:43:24,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:24,326 INFO L93 Difference]: Finished difference Result 300 states and 708 transitions. [2020-10-09 10:43:24,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:43:24,328 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:43:24,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:24,329 INFO L225 Difference]: With dead ends: 300 [2020-10-09 10:43:24,329 INFO L226 Difference]: Without dead ends: 287 [2020-10-09 10:43:24,329 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:43:24,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-09 10:43:24,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 224. [2020-10-09 10:43:24,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-09 10:43:24,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 562 transitions. [2020-10-09 10:43:24,336 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 562 transitions. Word has length 14 [2020-10-09 10:43:24,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:24,337 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 562 transitions. [2020-10-09 10:43:24,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:43:24,337 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 562 transitions. [2020-10-09 10:43:24,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:24,337 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:24,337 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:24,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2020-10-09 10:43:24,538 INFO L429 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:24,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:24,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1888866974, now seen corresponding path program 238 times [2020-10-09 10:43:24,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:24,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698753251] [2020-10-09 10:43:24,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:24,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698753251] [2020-10-09 10:43:24,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062278754] [2020-10-09 10:43:24,670 INFO L93 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:24,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:43:24,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:24,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:24,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:24,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:24,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:43:24,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571445888] [2020-10-09 10:43:24,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:43:24,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:24,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:43:24,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:43:24,999 INFO L87 Difference]: Start difference. First operand 224 states and 562 transitions. Second operand 17 states. [2020-10-09 10:43:25,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:25,505 INFO L93 Difference]: Finished difference Result 294 states and 701 transitions. [2020-10-09 10:43:25,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:43:25,506 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:43:25,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:25,507 INFO L225 Difference]: With dead ends: 294 [2020-10-09 10:43:25,507 INFO L226 Difference]: Without dead ends: 281 [2020-10-09 10:43:25,507 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:43:25,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-09 10:43:25,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 224. [2020-10-09 10:43:25,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-09 10:43:25,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 560 transitions. [2020-10-09 10:43:25,512 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 560 transitions. Word has length 14 [2020-10-09 10:43:25,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:25,512 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 560 transitions. [2020-10-09 10:43:25,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:43:25,512 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 560 transitions. [2020-10-09 10:43:25,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:25,512 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:25,513 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:25,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:25,718 INFO L429 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:25,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:25,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1888889294, now seen corresponding path program 239 times [2020-10-09 10:43:25,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:25,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267720132] [2020-10-09 10:43:25,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:25,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267720132] [2020-10-09 10:43:25,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042761018] [2020-10-09 10:43:25,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:25,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:43:25,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:25,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:25,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:26,131 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:43:27,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:27,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:27,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-09 10:43:27,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203422654] [2020-10-09 10:43:27,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-09 10:43:27,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:27,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-09 10:43:27,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=213, Unknown=1, NotChecked=0, Total=306 [2020-10-09 10:43:27,373 INFO L87 Difference]: Start difference. First operand 224 states and 560 transitions. Second operand 18 states. [2020-10-09 10:43:30,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:30,264 INFO L93 Difference]: Finished difference Result 303 states and 720 transitions. [2020-10-09 10:43:30,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:43:30,265 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-09 10:43:30,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:30,266 INFO L225 Difference]: With dead ends: 303 [2020-10-09 10:43:30,266 INFO L226 Difference]: Without dead ends: 286 [2020-10-09 10:43:30,266 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=307, Invalid=622, Unknown=1, NotChecked=0, Total=930 [2020-10-09 10:43:30,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-09 10:43:30,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 222. [2020-10-09 10:43:30,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-09 10:43:30,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 554 transitions. [2020-10-09 10:43:30,269 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 554 transitions. Word has length 14 [2020-10-09 10:43:30,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:30,270 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 554 transitions. [2020-10-09 10:43:30,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-09 10:43:30,270 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 554 transitions. [2020-10-09 10:43:30,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:30,270 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:30,270 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:30,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2020-10-09 10:43:30,471 INFO L429 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:30,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:30,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1888918124, now seen corresponding path program 240 times [2020-10-09 10:43:30,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:30,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048508780] [2020-10-09 10:43:30,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:30,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048508780] [2020-10-09 10:43:30,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783415870] [2020-10-09 10:43:30,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:30,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:43:30,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:30,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:30,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:30,862 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:43:30,882 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:30,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:30,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:43:30,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501840166] [2020-10-09 10:43:30,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:43:30,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:30,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:43:30,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:43:30,883 INFO L87 Difference]: Start difference. First operand 222 states and 554 transitions. Second operand 17 states. [2020-10-09 10:43:31,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:31,438 INFO L93 Difference]: Finished difference Result 287 states and 679 transitions. [2020-10-09 10:43:31,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:43:31,440 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:43:31,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:31,440 INFO L225 Difference]: With dead ends: 287 [2020-10-09 10:43:31,440 INFO L226 Difference]: Without dead ends: 271 [2020-10-09 10:43:31,441 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:43:31,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-09 10:43:31,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 216. [2020-10-09 10:43:31,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-09 10:43:31,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 535 transitions. [2020-10-09 10:43:31,444 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 535 transitions. Word has length 14 [2020-10-09 10:43:31,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:31,444 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 535 transitions. [2020-10-09 10:43:31,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:43:31,444 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 535 transitions. [2020-10-09 10:43:31,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:43:31,444 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:31,444 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:31,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:31,645 INFO L429 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:31,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:31,646 INFO L82 PathProgramCache]: Analyzing trace with hash 491278210, now seen corresponding path program 241 times [2020-10-09 10:43:31,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:31,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082615944] [2020-10-09 10:43:31,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:31,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:31,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082615944] [2020-10-09 10:43:31,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665444562] [2020-10-09 10:43:31,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:31,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:43:31,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:32,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:32,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:32,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:43:32,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048020734] [2020-10-09 10:43:32,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:43:32,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:32,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:43:32,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:43:32,183 INFO L87 Difference]: Start difference. First operand 216 states and 535 transitions. Second operand 19 states. [2020-10-09 10:43:32,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:32,513 INFO L93 Difference]: Finished difference Result 268 states and 633 transitions. [2020-10-09 10:43:32,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:43:32,514 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:43:32,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:32,515 INFO L225 Difference]: With dead ends: 268 [2020-10-09 10:43:32,515 INFO L226 Difference]: Without dead ends: 266 [2020-10-09 10:43:32,515 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=172, Invalid=380, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:43:32,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-09 10:43:32,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 227. [2020-10-09 10:43:32,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-09 10:43:32,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 563 transitions. [2020-10-09 10:43:32,518 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 563 transitions. Word has length 15 [2020-10-09 10:43:32,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:32,519 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 563 transitions. [2020-10-09 10:43:32,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:43:32,519 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 563 transitions. [2020-10-09 10:43:32,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:43:32,519 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:32,519 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:32,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-10-09 10:43:32,720 INFO L429 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:32,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:32,720 INFO L82 PathProgramCache]: Analyzing trace with hash 491307040, now seen corresponding path program 242 times [2020-10-09 10:43:32,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:32,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697466462] [2020-10-09 10:43:32,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:32,906 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:32,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697466462] [2020-10-09 10:43:32,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578714562] [2020-10-09 10:43:32,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:32,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:43:32,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:32,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:43:32,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:33,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:33,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:43:33,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357358411] [2020-10-09 10:43:33,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:43:33,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:33,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:43:33,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:43:33,333 INFO L87 Difference]: Start difference. First operand 227 states and 563 transitions. Second operand 19 states. [2020-10-09 10:43:33,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:33,818 INFO L93 Difference]: Finished difference Result 295 states and 691 transitions. [2020-10-09 10:43:33,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:43:33,820 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:43:33,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:33,820 INFO L225 Difference]: With dead ends: 295 [2020-10-09 10:43:33,820 INFO L226 Difference]: Without dead ends: 292 [2020-10-09 10:43:33,821 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:43:33,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-09 10:43:33,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 229. [2020-10-09 10:43:33,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-09 10:43:33,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 569 transitions. [2020-10-09 10:43:33,824 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 569 transitions. Word has length 15 [2020-10-09 10:43:33,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:33,825 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 569 transitions. [2020-10-09 10:43:33,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:43:33,825 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 569 transitions. [2020-10-09 10:43:33,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:43:33,825 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:33,825 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:34,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2020-10-09 10:43:34,026 INFO L429 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:34,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:34,026 INFO L82 PathProgramCache]: Analyzing trace with hash 492200770, now seen corresponding path program 243 times [2020-10-09 10:43:34,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:34,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305686933] [2020-10-09 10:43:34,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:34,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:34,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:34,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305686933] [2020-10-09 10:43:34,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558746597] [2020-10-09 10:43:34,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:34,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:43:34,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:34,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:43:34,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:39,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:39,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:39,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:43:39,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442806049] [2020-10-09 10:43:39,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:43:39,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:39,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:43:39,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:43:39,218 INFO L87 Difference]: Start difference. First operand 229 states and 569 transitions. Second operand 19 states. [2020-10-09 10:43:39,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:39,784 INFO L93 Difference]: Finished difference Result 294 states and 687 transitions. [2020-10-09 10:43:39,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 10:43:39,785 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:43:39,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:39,786 INFO L225 Difference]: With dead ends: 294 [2020-10-09 10:43:39,786 INFO L226 Difference]: Without dead ends: 292 [2020-10-09 10:43:39,786 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=244, Invalid=458, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:43:39,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-09 10:43:39,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 231. [2020-10-09 10:43:39,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-09 10:43:39,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 575 transitions. [2020-10-09 10:43:39,790 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 575 transitions. Word has length 15 [2020-10-09 10:43:39,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:39,790 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 575 transitions. [2020-10-09 10:43:39,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:43:39,790 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 575 transitions. [2020-10-09 10:43:39,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:43:39,790 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:39,790 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:39,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:39,991 INFO L429 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:39,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:39,992 INFO L82 PathProgramCache]: Analyzing trace with hash 492201731, now seen corresponding path program 244 times [2020-10-09 10:43:39,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:39,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261699784] [2020-10-09 10:43:39,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:39,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:40,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261699784] [2020-10-09 10:43:40,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943125509] [2020-10-09 10:43:40,176 INFO L93 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:40,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:43:40,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:40,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:43:40,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:42,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:42,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:42,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:43:42,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355047518] [2020-10-09 10:43:42,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:43:42,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:42,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:43:42,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=236, Unknown=1, NotChecked=0, Total=342 [2020-10-09 10:43:42,804 INFO L87 Difference]: Start difference. First operand 231 states and 575 transitions. Second operand 19 states. [2020-10-09 10:43:47,064 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-09 10:43:47,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:47,530 INFO L93 Difference]: Finished difference Result 320 states and 746 transitions. [2020-10-09 10:43:47,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:43:47,531 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:43:47,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:47,532 INFO L225 Difference]: With dead ends: 320 [2020-10-09 10:43:47,532 INFO L226 Difference]: Without dead ends: 316 [2020-10-09 10:43:47,532 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=231, Invalid=470, Unknown=1, NotChecked=0, Total=702 [2020-10-09 10:43:47,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-09 10:43:47,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 232. [2020-10-09 10:43:47,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-09 10:43:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 578 transitions. [2020-10-09 10:43:47,536 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 578 transitions. Word has length 15 [2020-10-09 10:43:47,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:47,536 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 578 transitions. [2020-10-09 10:43:47,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:43:47,536 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 578 transitions. [2020-10-09 10:43:47,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:43:47,536 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:47,537 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:47,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:47,737 INFO L429 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:47,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:47,738 INFO L82 PathProgramCache]: Analyzing trace with hash 492230561, now seen corresponding path program 245 times [2020-10-09 10:43:47,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:47,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718889884] [2020-10-09 10:43:47,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:47,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718889884] [2020-10-09 10:43:47,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16420977] [2020-10-09 10:43:47,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:47,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:43:47,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:47,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:43:47,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:48,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:48,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:43:48,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215852559] [2020-10-09 10:43:48,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:43:48,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:48,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:43:48,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:43:48,383 INFO L87 Difference]: Start difference. First operand 232 states and 578 transitions. Second operand 19 states. [2020-10-09 10:43:49,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:49,006 INFO L93 Difference]: Finished difference Result 311 states and 727 transitions. [2020-10-09 10:43:49,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:43:49,008 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:43:49,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:49,008 INFO L225 Difference]: With dead ends: 311 [2020-10-09 10:43:49,009 INFO L226 Difference]: Without dead ends: 308 [2020-10-09 10:43:49,009 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:43:49,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-10-09 10:43:49,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 232. [2020-10-09 10:43:49,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-09 10:43:49,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 578 transitions. [2020-10-09 10:43:49,012 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 578 transitions. Word has length 15 [2020-10-09 10:43:49,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:49,013 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 578 transitions. [2020-10-09 10:43:49,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:43:49,013 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 578 transitions. [2020-10-09 10:43:49,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:43:49,013 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:49,013 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:49,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:49,214 INFO L429 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:49,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:49,214 INFO L82 PathProgramCache]: Analyzing trace with hash 519906400, now seen corresponding path program 246 times [2020-10-09 10:43:49,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:49,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151634975] [2020-10-09 10:43:49,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:49,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151634975] [2020-10-09 10:43:49,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418972035] [2020-10-09 10:43:49,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:49,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:43:49,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:49,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:43:49,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:49,826 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:49,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:49,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:43:49,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964378837] [2020-10-09 10:43:49,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:43:49,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:49,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:43:49,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:43:49,828 INFO L87 Difference]: Start difference. First operand 232 states and 578 transitions. Second operand 19 states. [2020-10-09 10:43:50,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:50,523 INFO L93 Difference]: Finished difference Result 299 states and 700 transitions. [2020-10-09 10:43:50,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:43:50,525 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:43:50,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:50,526 INFO L225 Difference]: With dead ends: 299 [2020-10-09 10:43:50,526 INFO L226 Difference]: Without dead ends: 297 [2020-10-09 10:43:50,526 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:43:50,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-09 10:43:50,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 235. [2020-10-09 10:43:50,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-09 10:43:50,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 587 transitions. [2020-10-09 10:43:50,530 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 587 transitions. Word has length 15 [2020-10-09 10:43:50,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:50,530 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 587 transitions. [2020-10-09 10:43:50,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:43:50,530 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 587 transitions. [2020-10-09 10:43:50,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:43:50,531 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:50,531 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:50,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:50,737 INFO L429 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:50,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:50,737 INFO L82 PathProgramCache]: Analyzing trace with hash 519907361, now seen corresponding path program 247 times [2020-10-09 10:43:50,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:50,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294978318] [2020-10-09 10:43:50,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:50,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294978318] [2020-10-09 10:43:50,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402123394] [2020-10-09 10:43:50,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:50,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:43:50,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:53,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:53,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:53,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:43:53,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315438687] [2020-10-09 10:43:53,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:43:53,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:53,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:43:53,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=238, Unknown=1, NotChecked=0, Total=342 [2020-10-09 10:43:53,437 INFO L87 Difference]: Start difference. First operand 235 states and 587 transitions. Second operand 19 states. [2020-10-09 10:43:54,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:54,380 INFO L93 Difference]: Finished difference Result 325 states and 758 transitions. [2020-10-09 10:43:54,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:43:54,382 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:43:54,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:54,383 INFO L225 Difference]: With dead ends: 325 [2020-10-09 10:43:54,383 INFO L226 Difference]: Without dead ends: 321 [2020-10-09 10:43:54,383 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=248, Invalid=507, Unknown=1, NotChecked=0, Total=756 [2020-10-09 10:43:54,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-10-09 10:43:54,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 235. [2020-10-09 10:43:54,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-09 10:43:54,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 587 transitions. [2020-10-09 10:43:54,387 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 587 transitions. Word has length 15 [2020-10-09 10:43:54,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:54,387 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 587 transitions. [2020-10-09 10:43:54,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:43:54,387 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 587 transitions. [2020-10-09 10:43:54,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:43:54,387 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:54,387 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:54,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2020-10-09 10:43:54,589 INFO L429 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:54,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:54,590 INFO L82 PathProgramCache]: Analyzing trace with hash 519936191, now seen corresponding path program 248 times [2020-10-09 10:43:54,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:54,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844890583] [2020-10-09 10:43:54,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:54,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844890583] [2020-10-09 10:43:54,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004660840] [2020-10-09 10:43:54,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:54,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:43:54,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:54,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:43:54,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:04,721 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-09 10:44:08,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:08,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:08,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:44:08,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774748159] [2020-10-09 10:44:08,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:44:08,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:08,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:44:08,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=235, Unknown=2, NotChecked=0, Total=342 [2020-10-09 10:44:08,013 INFO L87 Difference]: Start difference. First operand 235 states and 587 transitions. Second operand 19 states. [2020-10-09 10:44:12,268 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-09 10:44:25,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:25,150 INFO L93 Difference]: Finished difference Result 337 states and 786 transitions. [2020-10-09 10:44:25,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:44:25,152 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:44:25,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:25,153 INFO L225 Difference]: With dead ends: 337 [2020-10-09 10:44:25,153 INFO L226 Difference]: Without dead ends: 333 [2020-10-09 10:44:25,153 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=253, Invalid=500, Unknown=3, NotChecked=0, Total=756 [2020-10-09 10:44:25,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-10-09 10:44:25,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 236. [2020-10-09 10:44:25,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-09 10:44:25,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 590 transitions. [2020-10-09 10:44:25,157 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 590 transitions. Word has length 15 [2020-10-09 10:44:25,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:25,157 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 590 transitions. [2020-10-09 10:44:25,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:44:25,157 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 590 transitions. [2020-10-09 10:44:25,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:44:25,158 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:25,158 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:25,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:25,367 INFO L429 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:25,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:25,367 INFO L82 PathProgramCache]: Analyzing trace with hash 520830882, now seen corresponding path program 249 times [2020-10-09 10:44:25,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:25,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726958999] [2020-10-09 10:44:25,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:25,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726958999] [2020-10-09 10:44:25,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621243214] [2020-10-09 10:44:25,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:25,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:44:25,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:44:25,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:44:25,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:26,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:26,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:44:26,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761527322] [2020-10-09 10:44:26,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:44:26,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:26,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:44:26,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:44:26,975 INFO L87 Difference]: Start difference. First operand 236 states and 590 transitions. Second operand 19 states. [2020-10-09 10:44:27,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:27,790 INFO L93 Difference]: Finished difference Result 335 states and 781 transitions. [2020-10-09 10:44:27,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:44:27,792 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:44:27,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:27,793 INFO L225 Difference]: With dead ends: 335 [2020-10-09 10:44:27,793 INFO L226 Difference]: Without dead ends: 319 [2020-10-09 10:44:27,793 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:44:27,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-10-09 10:44:27,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 236. [2020-10-09 10:44:27,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-09 10:44:27,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 583 transitions. [2020-10-09 10:44:27,797 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 583 transitions. Word has length 15 [2020-10-09 10:44:27,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:27,797 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 583 transitions. [2020-10-09 10:44:27,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:44:27,797 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 583 transitions. [2020-10-09 10:44:27,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:44:27,797 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:27,797 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:27,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2020-10-09 10:44:27,998 INFO L429 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:27,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:27,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1378780930, now seen corresponding path program 250 times [2020-10-09 10:44:27,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:27,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917322605] [2020-10-09 10:44:27,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:28,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917322605] [2020-10-09 10:44:28,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467733514] [2020-10-09 10:44:28,194 INFO L93 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:28,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:44:28,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:44:28,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:44:28,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:28,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:28,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:44:28,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486950533] [2020-10-09 10:44:28,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:44:28,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:28,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:44:28,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:44:28,581 INFO L87 Difference]: Start difference. First operand 236 states and 583 transitions. Second operand 19 states. [2020-10-09 10:44:29,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:29,309 INFO L93 Difference]: Finished difference Result 297 states and 694 transitions. [2020-10-09 10:44:29,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:44:29,311 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:44:29,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:29,312 INFO L225 Difference]: With dead ends: 297 [2020-10-09 10:44:29,312 INFO L226 Difference]: Without dead ends: 295 [2020-10-09 10:44:29,313 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:44:29,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-09 10:44:29,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 240. [2020-10-09 10:44:29,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-09 10:44:29,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 594 transitions. [2020-10-09 10:44:29,316 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 594 transitions. Word has length 15 [2020-10-09 10:44:29,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:29,316 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 594 transitions. [2020-10-09 10:44:29,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:44:29,316 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 594 transitions. [2020-10-09 10:44:29,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:44:29,317 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:29,317 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:29,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:29,517 INFO L429 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:29,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:29,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1378781891, now seen corresponding path program 251 times [2020-10-09 10:44:29,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:29,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663782069] [2020-10-09 10:44:29,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:29,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:29,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663782069] [2020-10-09 10:44:29,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937364625] [2020-10-09 10:44:29,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:29,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:44:29,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:44:29,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:44:29,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:30,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:30,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:44:30,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623098213] [2020-10-09 10:44:30,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:44:30,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:30,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:44:30,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:44:30,107 INFO L87 Difference]: Start difference. First operand 240 states and 594 transitions. Second operand 19 states. [2020-10-09 10:44:30,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:30,826 INFO L93 Difference]: Finished difference Result 321 states and 746 transitions. [2020-10-09 10:44:30,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:44:30,827 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:44:30,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:30,828 INFO L225 Difference]: With dead ends: 321 [2020-10-09 10:44:30,828 INFO L226 Difference]: Without dead ends: 318 [2020-10-09 10:44:30,829 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2020-10-09 10:44:30,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-09 10:44:30,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 239. [2020-10-09 10:44:30,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-09 10:44:30,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 591 transitions. [2020-10-09 10:44:30,832 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 591 transitions. Word has length 15 [2020-10-09 10:44:30,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:30,832 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 591 transitions. [2020-10-09 10:44:30,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:44:30,833 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 591 transitions. [2020-10-09 10:44:30,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:44:30,833 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:30,833 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:31,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-10-09 10:44:31,044 INFO L429 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:31,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:31,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1378810721, now seen corresponding path program 252 times [2020-10-09 10:44:31,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:31,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915359761] [2020-10-09 10:44:31,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:31,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:31,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915359761] [2020-10-09 10:44:31,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474986707] [2020-10-09 10:44:31,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:31,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-09 10:44:31,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:44:31,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:44:31,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:31,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:31,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:44:31,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341839097] [2020-10-09 10:44:31,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:44:31,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:31,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:44:31,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:44:31,823 INFO L87 Difference]: Start difference. First operand 239 states and 591 transitions. Second operand 19 states. [2020-10-09 10:44:32,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:32,575 INFO L93 Difference]: Finished difference Result 332 states and 772 transitions. [2020-10-09 10:44:32,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:44:32,577 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:44:32,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:32,578 INFO L225 Difference]: With dead ends: 332 [2020-10-09 10:44:32,578 INFO L226 Difference]: Without dead ends: 328 [2020-10-09 10:44:32,579 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:44:32,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-09 10:44:32,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 238. [2020-10-09 10:44:32,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-09 10:44:32,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 588 transitions. [2020-10-09 10:44:32,583 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 588 transitions. Word has length 15 [2020-10-09 10:44:32,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:32,583 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 588 transitions. [2020-10-09 10:44:32,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:44:32,584 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 588 transitions. [2020-10-09 10:44:32,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:44:32,584 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:32,584 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:32,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:32,795 INFO L429 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:32,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:32,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1379704451, now seen corresponding path program 253 times [2020-10-09 10:44:32,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:32,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265422860] [2020-10-09 10:44:32,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:32,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265422860] [2020-10-09 10:44:32,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211925894] [2020-10-09 10:44:32,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:33,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:44:33,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:33,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:33,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:44:33,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196413173] [2020-10-09 10:44:33,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:44:33,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:33,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:44:33,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:44:33,366 INFO L87 Difference]: Start difference. First operand 238 states and 588 transitions. Second operand 19 states. [2020-10-09 10:44:34,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:34,126 INFO L93 Difference]: Finished difference Result 341 states and 793 transitions. [2020-10-09 10:44:34,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:44:34,128 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:44:34,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:34,129 INFO L225 Difference]: With dead ends: 341 [2020-10-09 10:44:34,129 INFO L226 Difference]: Without dead ends: 337 [2020-10-09 10:44:34,129 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:44:34,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-09 10:44:34,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 243. [2020-10-09 10:44:34,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-09 10:44:34,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 601 transitions. [2020-10-09 10:44:34,133 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 601 transitions. Word has length 15 [2020-10-09 10:44:34,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:34,133 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 601 transitions. [2020-10-09 10:44:34,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:44:34,133 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 601 transitions. [2020-10-09 10:44:34,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:44:34,134 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:34,134 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:34,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:34,334 INFO L429 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:34,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:34,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1379705412, now seen corresponding path program 254 times [2020-10-09 10:44:34,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:34,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91653969] [2020-10-09 10:44:34,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:34,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:34,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91653969] [2020-10-09 10:44:34,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876003240] [2020-10-09 10:44:34,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:34,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:44:34,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:44:34,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:44:34,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:34,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:34,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:34,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:44:34,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041292412] [2020-10-09 10:44:34,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:44:34,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:34,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:44:34,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:44:34,898 INFO L87 Difference]: Start difference. First operand 243 states and 601 transitions. Second operand 19 states. [2020-10-09 10:44:35,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:35,513 INFO L93 Difference]: Finished difference Result 341 states and 794 transitions. [2020-10-09 10:44:35,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:44:35,514 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:44:35,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:35,515 INFO L225 Difference]: With dead ends: 341 [2020-10-09 10:44:35,515 INFO L226 Difference]: Without dead ends: 326 [2020-10-09 10:44:35,515 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:44:35,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-09 10:44:35,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 244. [2020-10-09 10:44:35,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-09 10:44:35,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 601 transitions. [2020-10-09 10:44:35,519 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 601 transitions. Word has length 15 [2020-10-09 10:44:35,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:35,519 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 601 transitions. [2020-10-09 10:44:35,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:44:35,519 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 601 transitions. [2020-10-09 10:44:35,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:44:35,520 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:35,520 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:35,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2020-10-09 10:44:35,720 INFO L429 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:35,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:35,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1379734242, now seen corresponding path program 255 times [2020-10-09 10:44:35,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:35,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87537587] [2020-10-09 10:44:35,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:35,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87537587] [2020-10-09 10:44:35,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970301305] [2020-10-09 10:44:35,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:35,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:44:35,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:44:35,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:44:35,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:36,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:36,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:36,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:44:36,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365148082] [2020-10-09 10:44:36,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:44:36,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:36,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:44:36,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:44:36,295 INFO L87 Difference]: Start difference. First operand 244 states and 601 transitions. Second operand 19 states. [2020-10-09 10:44:37,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:37,116 INFO L93 Difference]: Finished difference Result 339 states and 790 transitions. [2020-10-09 10:44:37,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:44:37,117 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:44:37,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:37,118 INFO L225 Difference]: With dead ends: 339 [2020-10-09 10:44:37,118 INFO L226 Difference]: Without dead ends: 328 [2020-10-09 10:44:37,118 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:44:37,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-09 10:44:37,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 242. [2020-10-09 10:44:37,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-09 10:44:37,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 596 transitions. [2020-10-09 10:44:37,122 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 596 transitions. Word has length 15 [2020-10-09 10:44:37,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:37,122 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 596 transitions. [2020-10-09 10:44:37,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:44:37,122 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 596 transitions. [2020-10-09 10:44:37,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:44:37,123 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:37,123 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:37,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:37,323 INFO L429 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:37,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:37,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1407411042, now seen corresponding path program 256 times [2020-10-09 10:44:37,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:37,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972194964] [2020-10-09 10:44:37,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:37,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972194964] [2020-10-09 10:44:37,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076981469] [2020-10-09 10:44:37,523 INFO L93 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:37,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:44:37,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:44:37,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:44:37,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:37,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:37,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:44:37,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682670262] [2020-10-09 10:44:37,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:44:37,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:37,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:44:37,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:44:37,998 INFO L87 Difference]: Start difference. First operand 242 states and 596 transitions. Second operand 19 states. [2020-10-09 10:44:39,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:39,044 INFO L93 Difference]: Finished difference Result 344 states and 797 transitions. [2020-10-09 10:44:39,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:44:39,046 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:44:39,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:39,047 INFO L225 Difference]: With dead ends: 344 [2020-10-09 10:44:39,047 INFO L226 Difference]: Without dead ends: 331 [2020-10-09 10:44:39,048 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=318, Invalid=674, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:44:39,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-09 10:44:39,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 242. [2020-10-09 10:44:39,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-09 10:44:39,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 594 transitions. [2020-10-09 10:44:39,051 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 594 transitions. Word has length 15 [2020-10-09 10:44:39,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:39,051 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 594 transitions. [2020-10-09 10:44:39,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:44:39,051 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 594 transitions. [2020-10-09 10:44:39,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:44:39,052 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:39,052 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:39,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:39,252 INFO L429 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:39,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:39,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1407439872, now seen corresponding path program 257 times [2020-10-09 10:44:39,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:39,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747623483] [2020-10-09 10:44:39,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:39,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747623483] [2020-10-09 10:44:39,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918662663] [2020-10-09 10:44:39,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:39,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:44:39,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:44:39,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:44:39,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:44,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:44,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:44,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:44:44,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278008097] [2020-10-09 10:44:44,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:44:44,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:44,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:44:44,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=243, Unknown=2, NotChecked=0, Total=342 [2020-10-09 10:44:44,888 INFO L87 Difference]: Start difference. First operand 242 states and 594 transitions. Second operand 19 states. [2020-10-09 10:44:49,299 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-09 10:44:53,568 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-09 10:44:55,983 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-09 10:44:56,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:56,283 INFO L93 Difference]: Finished difference Result 327 states and 762 transitions. [2020-10-09 10:44:56,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:44:56,285 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:44:56,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:56,286 INFO L225 Difference]: With dead ends: 327 [2020-10-09 10:44:56,286 INFO L226 Difference]: Without dead ends: 323 [2020-10-09 10:44:56,286 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=292, Invalid=636, Unknown=2, NotChecked=0, Total=930 [2020-10-09 10:44:56,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-10-09 10:44:56,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 240. [2020-10-09 10:44:56,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-09 10:44:56,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 590 transitions. [2020-10-09 10:44:56,290 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 590 transitions. Word has length 15 [2020-10-09 10:44:56,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:56,290 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 590 transitions. [2020-10-09 10:44:56,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:44:56,290 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 590 transitions. [2020-10-09 10:44:56,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:44:56,290 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:56,290 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:56,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:56,491 INFO L429 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:56,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:56,492 INFO L82 PathProgramCache]: Analyzing trace with hash -2060879712, now seen corresponding path program 258 times [2020-10-09 10:44:56,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:56,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983134996] [2020-10-09 10:44:56,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:56,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983134996] [2020-10-09 10:44:56,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926871675] [2020-10-09 10:44:56,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:56,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-09 10:44:56,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:44:56,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:44:56,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:57,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:57,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:57,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:44:57,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932871701] [2020-10-09 10:44:57,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:44:57,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:57,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:44:57,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:44:57,067 INFO L87 Difference]: Start difference. First operand 240 states and 590 transitions. Second operand 19 states. [2020-10-09 10:44:57,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:57,676 INFO L93 Difference]: Finished difference Result 291 states and 682 transitions. [2020-10-09 10:44:57,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:44:57,678 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:44:57,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:57,679 INFO L225 Difference]: With dead ends: 291 [2020-10-09 10:44:57,679 INFO L226 Difference]: Without dead ends: 289 [2020-10-09 10:44:57,679 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:44:57,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-09 10:44:57,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 246. [2020-10-09 10:44:57,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-09 10:44:57,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 605 transitions. [2020-10-09 10:44:57,683 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 605 transitions. Word has length 15 [2020-10-09 10:44:57,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:57,683 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 605 transitions. [2020-10-09 10:44:57,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:44:57,683 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 605 transitions. [2020-10-09 10:44:57,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:44:57,683 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:57,683 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:57,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:57,884 INFO L429 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:57,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:57,885 INFO L82 PathProgramCache]: Analyzing trace with hash -2060878751, now seen corresponding path program 259 times [2020-10-09 10:44:57,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:57,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659544900] [2020-10-09 10:44:57,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:58,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:58,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659544900] [2020-10-09 10:44:58,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574710047] [2020-10-09 10:44:58,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:58,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:44:58,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:58,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:58,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:58,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:44:58,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897852245] [2020-10-09 10:44:58,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:44:58,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:58,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:44:58,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:44:58,476 INFO L87 Difference]: Start difference. First operand 246 states and 605 transitions. Second operand 19 states. [2020-10-09 10:44:59,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:59,108 INFO L93 Difference]: Finished difference Result 316 states and 735 transitions. [2020-10-09 10:44:59,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:44:59,110 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:44:59,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:59,111 INFO L225 Difference]: With dead ends: 316 [2020-10-09 10:44:59,111 INFO L226 Difference]: Without dead ends: 313 [2020-10-09 10:44:59,111 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:44:59,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-09 10:44:59,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 245. [2020-10-09 10:44:59,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-09 10:44:59,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 602 transitions. [2020-10-09 10:44:59,115 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 602 transitions. Word has length 15 [2020-10-09 10:44:59,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:59,115 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 602 transitions. [2020-10-09 10:44:59,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:44:59,115 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 602 transitions. [2020-10-09 10:44:59,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:44:59,115 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:59,115 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:59,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-10-09 10:44:59,316 INFO L429 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:59,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:59,317 INFO L82 PathProgramCache]: Analyzing trace with hash -2060849921, now seen corresponding path program 260 times [2020-10-09 10:44:59,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:59,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927648933] [2020-10-09 10:44:59,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:59,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927648933] [2020-10-09 10:44:59,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464101693] [2020-10-09 10:44:59,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:59,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:44:59,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:44:59,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:44:59,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:01,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:01,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:01,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:45:01,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60385286] [2020-10-09 10:45:01,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:45:01,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:01,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:45:01,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:45:01,632 INFO L87 Difference]: Start difference. First operand 245 states and 602 transitions. Second operand 19 states. [2020-10-09 10:45:02,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:02,332 INFO L93 Difference]: Finished difference Result 330 states and 766 transitions. [2020-10-09 10:45:02,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:45:02,334 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:45:02,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:02,335 INFO L225 Difference]: With dead ends: 330 [2020-10-09 10:45:02,335 INFO L226 Difference]: Without dead ends: 326 [2020-10-09 10:45:02,336 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:45:02,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-09 10:45:02,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 244. [2020-10-09 10:45:02,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-09 10:45:02,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 599 transitions. [2020-10-09 10:45:02,339 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 599 transitions. Word has length 15 [2020-10-09 10:45:02,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:02,339 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 599 transitions. [2020-10-09 10:45:02,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:45:02,339 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 599 transitions. [2020-10-09 10:45:02,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:45:02,339 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:02,339 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:02,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-10-09 10:45:02,540 INFO L429 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:02,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:02,540 INFO L82 PathProgramCache]: Analyzing trace with hash -2059956191, now seen corresponding path program 261 times [2020-10-09 10:45:02,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:02,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907095360] [2020-10-09 10:45:02,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:02,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:02,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907095360] [2020-10-09 10:45:02,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548642057] [2020-10-09 10:45:02,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:02,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-09 10:45:02,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:02,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:45:02,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:03,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:03,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:45:03,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378837148] [2020-10-09 10:45:03,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:45:03,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:03,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:45:03,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:45:03,213 INFO L87 Difference]: Start difference. First operand 244 states and 599 transitions. Second operand 19 states. [2020-10-09 10:45:04,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:04,082 INFO L93 Difference]: Finished difference Result 328 states and 761 transitions. [2020-10-09 10:45:04,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:45:04,084 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:45:04,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:04,084 INFO L225 Difference]: With dead ends: 328 [2020-10-09 10:45:04,084 INFO L226 Difference]: Without dead ends: 324 [2020-10-09 10:45:04,085 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2020-10-09 10:45:04,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-10-09 10:45:04,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 251. [2020-10-09 10:45:04,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-09 10:45:04,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 616 transitions. [2020-10-09 10:45:04,088 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 616 transitions. Word has length 15 [2020-10-09 10:45:04,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:04,089 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 616 transitions. [2020-10-09 10:45:04,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:45:04,089 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 616 transitions. [2020-10-09 10:45:04,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:45:04,089 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:04,089 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:04,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-10-09 10:45:04,290 INFO L429 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:04,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:04,291 INFO L82 PathProgramCache]: Analyzing trace with hash -2059955230, now seen corresponding path program 262 times [2020-10-09 10:45:04,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:04,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40539667] [2020-10-09 10:45:04,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:04,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40539667] [2020-10-09 10:45:04,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682888832] [2020-10-09 10:45:04,522 INFO L93 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:04,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:45:04,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:04,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:45:04,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:09,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:09,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:09,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:45:09,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751586591] [2020-10-09 10:45:09,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:45:09,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:09,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:45:09,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=243, Unknown=2, NotChecked=0, Total=342 [2020-10-09 10:45:09,231 INFO L87 Difference]: Start difference. First operand 251 states and 616 transitions. Second operand 19 states. [2020-10-09 10:45:13,719 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-09 10:45:17,903 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-09 10:45:20,186 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-09 10:45:20,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:20,607 INFO L93 Difference]: Finished difference Result 348 states and 801 transitions. [2020-10-09 10:45:20,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:45:20,609 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:45:20,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:20,610 INFO L225 Difference]: With dead ends: 348 [2020-10-09 10:45:20,610 INFO L226 Difference]: Without dead ends: 332 [2020-10-09 10:45:20,610 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=292, Invalid=636, Unknown=2, NotChecked=0, Total=930 [2020-10-09 10:45:20,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-10-09 10:45:20,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 254. [2020-10-09 10:45:20,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-09 10:45:20,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 619 transitions. [2020-10-09 10:45:20,614 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 619 transitions. Word has length 15 [2020-10-09 10:45:20,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:20,614 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 619 transitions. [2020-10-09 10:45:20,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:45:20,614 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 619 transitions. [2020-10-09 10:45:20,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:45:20,615 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:20,615 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:20,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:20,815 INFO L429 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:20,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:20,821 INFO L82 PathProgramCache]: Analyzing trace with hash -2059926400, now seen corresponding path program 263 times [2020-10-09 10:45:20,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:20,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243368105] [2020-10-09 10:45:20,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:21,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243368105] [2020-10-09 10:45:21,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779719251] [2020-10-09 10:45:21,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:21,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-09 10:45:21,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:21,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:45:21,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:21,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:21,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:45:21,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162105749] [2020-10-09 10:45:21,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:45:21,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:21,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:45:21,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:45:21,534 INFO L87 Difference]: Start difference. First operand 254 states and 619 transitions. Second operand 19 states. [2020-10-09 10:45:22,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:22,630 INFO L93 Difference]: Finished difference Result 342 states and 787 transitions. [2020-10-09 10:45:22,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:45:22,631 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:45:22,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:22,632 INFO L225 Difference]: With dead ends: 342 [2020-10-09 10:45:22,632 INFO L226 Difference]: Without dead ends: 331 [2020-10-09 10:45:22,632 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=342, Invalid=714, Unknown=0, NotChecked=0, Total=1056 [2020-10-09 10:45:22,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-09 10:45:22,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 250. [2020-10-09 10:45:22,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-09 10:45:22,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 611 transitions. [2020-10-09 10:45:22,637 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 611 transitions. Word has length 15 [2020-10-09 10:45:22,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:22,637 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 611 transitions. [2020-10-09 10:45:22,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:45:22,637 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 611 transitions. [2020-10-09 10:45:22,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:45:22,638 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:22,638 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:22,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2020-10-09 10:45:22,839 INFO L429 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:22,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:22,839 INFO L82 PathProgramCache]: Analyzing trace with hash -2032250561, now seen corresponding path program 264 times [2020-10-09 10:45:22,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:22,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947356671] [2020-10-09 10:45:22,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:22,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:23,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:23,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947356671] [2020-10-09 10:45:23,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013114388] [2020-10-09 10:45:23,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:23,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-09 10:45:23,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:23,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:45:23,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:23,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:23,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:45:23,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241638883] [2020-10-09 10:45:23,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:45:23,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:23,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:45:23,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:45:23,425 INFO L87 Difference]: Start difference. First operand 250 states and 611 transitions. Second operand 19 states. [2020-10-09 10:45:24,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:24,164 INFO L93 Difference]: Finished difference Result 326 states and 755 transitions. [2020-10-09 10:45:24,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:45:24,167 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:45:24,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:24,168 INFO L225 Difference]: With dead ends: 326 [2020-10-09 10:45:24,168 INFO L226 Difference]: Without dead ends: 322 [2020-10-09 10:45:24,168 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:45:24,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-09 10:45:24,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 255. [2020-10-09 10:45:24,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-09 10:45:24,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 623 transitions. [2020-10-09 10:45:24,175 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 623 transitions. Word has length 15 [2020-10-09 10:45:24,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:24,175 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 623 transitions. [2020-10-09 10:45:24,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:45:24,175 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 623 transitions. [2020-10-09 10:45:24,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:45:24,176 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:24,176 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:24,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2020-10-09 10:45:24,376 INFO L429 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:24,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:24,377 INFO L82 PathProgramCache]: Analyzing trace with hash -2032220770, now seen corresponding path program 265 times [2020-10-09 10:45:24,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:24,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66496462] [2020-10-09 10:45:24,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:24,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:24,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66496462] [2020-10-09 10:45:24,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308972612] [2020-10-09 10:45:24,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:24,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:45:24,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:24,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:24,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:24,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:45:24,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235726135] [2020-10-09 10:45:24,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:45:24,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:24,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:45:24,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:45:24,946 INFO L87 Difference]: Start difference. First operand 255 states and 623 transitions. Second operand 19 states. [2020-10-09 10:45:25,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:25,571 INFO L93 Difference]: Finished difference Result 341 states and 782 transitions. [2020-10-09 10:45:25,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:45:25,573 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:45:25,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:25,574 INFO L225 Difference]: With dead ends: 341 [2020-10-09 10:45:25,574 INFO L226 Difference]: Without dead ends: 330 [2020-10-09 10:45:25,574 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:45:25,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-09 10:45:25,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 251. [2020-10-09 10:45:25,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-09 10:45:25,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 615 transitions. [2020-10-09 10:45:25,577 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 615 transitions. Word has length 15 [2020-10-09 10:45:25,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:25,578 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 615 transitions. [2020-10-09 10:45:25,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:45:25,578 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 615 transitions. [2020-10-09 10:45:25,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:45:25,578 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:25,578 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:25,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:25,779 INFO L429 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:25,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:25,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1173375070, now seen corresponding path program 266 times [2020-10-09 10:45:25,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:25,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542364114] [2020-10-09 10:45:25,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:26,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:26,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542364114] [2020-10-09 10:45:26,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014744834] [2020-10-09 10:45:26,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:26,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:45:26,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:26,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:45:26,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:26,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:26,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:26,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:45:26,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625158513] [2020-10-09 10:45:26,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:45:26,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:26,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:45:26,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:45:26,555 INFO L87 Difference]: Start difference. First operand 251 states and 615 transitions. Second operand 19 states. [2020-10-09 10:45:27,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:27,356 INFO L93 Difference]: Finished difference Result 325 states and 750 transitions. [2020-10-09 10:45:27,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:45:27,358 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:45:27,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:27,359 INFO L225 Difference]: With dead ends: 325 [2020-10-09 10:45:27,359 INFO L226 Difference]: Without dead ends: 313 [2020-10-09 10:45:27,359 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:45:27,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-09 10:45:27,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 249. [2020-10-09 10:45:27,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-09 10:45:27,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 610 transitions. [2020-10-09 10:45:27,362 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 610 transitions. Word has length 15 [2020-10-09 10:45:27,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:27,362 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 610 transitions. [2020-10-09 10:45:27,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:45:27,363 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 610 transitions. [2020-10-09 10:45:27,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:45:27,363 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:27,363 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:27,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:27,564 INFO L429 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:27,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:27,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1173345279, now seen corresponding path program 267 times [2020-10-09 10:45:27,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:27,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727666516] [2020-10-09 10:45:27,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:27,816 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:27,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727666516] [2020-10-09 10:45:27,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027432801] [2020-10-09 10:45:27,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:27,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-09 10:45:27,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:27,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:45:27,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:29,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:29,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:45:29,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675771316] [2020-10-09 10:45:29,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:45:29,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:29,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:45:29,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:45:29,777 INFO L87 Difference]: Start difference. First operand 249 states and 610 transitions. Second operand 19 states. [2020-10-09 10:45:30,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:30,803 INFO L93 Difference]: Finished difference Result 320 states and 735 transitions. [2020-10-09 10:45:30,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:45:30,805 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:45:30,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:30,806 INFO L225 Difference]: With dead ends: 320 [2020-10-09 10:45:30,806 INFO L226 Difference]: Without dead ends: 307 [2020-10-09 10:45:30,807 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=291, Invalid=579, Unknown=0, NotChecked=0, Total=870 [2020-10-09 10:45:30,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-09 10:45:30,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 246. [2020-10-09 10:45:30,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-09 10:45:30,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 602 transitions. [2020-10-09 10:45:30,810 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 602 transitions. Word has length 15 [2020-10-09 10:45:30,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:30,810 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 602 transitions. [2020-10-09 10:45:30,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:45:30,810 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 602 transitions. [2020-10-09 10:45:30,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:45:30,810 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:30,811 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:31,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:31,011 INFO L429 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:31,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:31,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1143823359, now seen corresponding path program 268 times [2020-10-09 10:45:31,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:31,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411638917] [2020-10-09 10:45:31,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:31,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:31,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411638917] [2020-10-09 10:45:31,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844943600] [2020-10-09 10:45:31,301 INFO L93 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 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:31,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:45:31,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:31,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:45:31,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:31,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:31,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:31,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:45:31,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265179858] [2020-10-09 10:45:31,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:45:31,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:31,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:45:31,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:45:31,725 INFO L87 Difference]: Start difference. First operand 246 states and 602 transitions. Second operand 19 states. [2020-10-09 10:45:32,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:32,089 INFO L93 Difference]: Finished difference Result 300 states and 697 transitions. [2020-10-09 10:45:32,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:45:32,091 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:45:32,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:32,092 INFO L225 Difference]: With dead ends: 300 [2020-10-09 10:45:32,092 INFO L226 Difference]: Without dead ends: 289 [2020-10-09 10:45:32,092 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:45:32,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-09 10:45:32,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 248. [2020-10-09 10:45:32,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-09 10:45:32,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 604 transitions. [2020-10-09 10:45:32,096 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 604 transitions. Word has length 15 [2020-10-09 10:45:32,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:32,096 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 604 transitions. [2020-10-09 10:45:32,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:45:32,096 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 604 transitions. [2020-10-09 10:45:32,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:45:32,096 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:32,097 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:32,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable296 [2020-10-09 10:45:32,297 INFO L429 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:32,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:32,298 INFO L82 PathProgramCache]: Analyzing trace with hash 439566480, now seen corresponding path program 269 times [2020-10-09 10:45:32,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:32,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158399663] [2020-10-09 10:45:32,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:32,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:32,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158399663] [2020-10-09 10:45:32,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776467501] [2020-10-09 10:45:32,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:32,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:45:32,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:32,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:45:32,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:33,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:33,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:45:33,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468235468] [2020-10-09 10:45:33,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:45:33,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:33,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:45:33,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:45:33,030 INFO L87 Difference]: Start difference. First operand 248 states and 604 transitions. Second operand 19 states. [2020-10-09 10:45:33,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:33,500 INFO L93 Difference]: Finished difference Result 308 states and 716 transitions. [2020-10-09 10:45:33,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:45:33,502 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:45:33,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:33,503 INFO L225 Difference]: With dead ends: 308 [2020-10-09 10:45:33,503 INFO L226 Difference]: Without dead ends: 306 [2020-10-09 10:45:33,503 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:45:33,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-09 10:45:33,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 254. [2020-10-09 10:45:33,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-09 10:45:33,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 622 transitions. [2020-10-09 10:45:33,507 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 622 transitions. Word has length 15 [2020-10-09 10:45:33,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:33,507 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 622 transitions. [2020-10-09 10:45:33,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:45:33,507 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 622 transitions. [2020-10-09 10:45:33,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:45:33,507 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:33,507 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:33,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:33,708 INFO L429 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:33,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:33,708 INFO L82 PathProgramCache]: Analyzing trace with hash 439595310, now seen corresponding path program 270 times [2020-10-09 10:45:33,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:33,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359620275] [2020-10-09 10:45:33,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:34,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359620275] [2020-10-09 10:45:34,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655196089] [2020-10-09 10:45:34,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:34,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:45:34,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:34,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:45:34,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:34,992 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:34,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:34,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:45:34,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055347928] [2020-10-09 10:45:34,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:45:34,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:34,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:45:34,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:45:34,993 INFO L87 Difference]: Start difference. First operand 254 states and 622 transitions. Second operand 19 states. [2020-10-09 10:45:35,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:35,683 INFO L93 Difference]: Finished difference Result 335 states and 780 transitions. [2020-10-09 10:45:35,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:45:35,686 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:45:35,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:35,686 INFO L225 Difference]: With dead ends: 335 [2020-10-09 10:45:35,686 INFO L226 Difference]: Without dead ends: 332 [2020-10-09 10:45:35,687 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:45:35,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-10-09 10:45:35,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 252. [2020-10-09 10:45:35,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-09 10:45:35,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 616 transitions. [2020-10-09 10:45:35,690 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 616 transitions. Word has length 15 [2020-10-09 10:45:35,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:35,690 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 616 transitions. [2020-10-09 10:45:35,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:45:35,690 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 616 transitions. [2020-10-09 10:45:35,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:45:35,691 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:35,691 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:35,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2020-10-09 10:45:35,892 INFO L429 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:35,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:35,892 INFO L82 PathProgramCache]: Analyzing trace with hash 440489040, now seen corresponding path program 271 times [2020-10-09 10:45:35,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:35,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183927261] [2020-10-09 10:45:35,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:35,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:36,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183927261] [2020-10-09 10:45:36,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795204691] [2020-10-09 10:45:36,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:36,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:45:36,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:42,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:42,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:42,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:45:42,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260057915] [2020-10-09 10:45:42,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:45:42,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:42,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:45:42,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:45:42,293 INFO L87 Difference]: Start difference. First operand 252 states and 616 transitions. Second operand 19 states. [2020-10-09 10:45:43,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:43,159 INFO L93 Difference]: Finished difference Result 329 states and 762 transitions. [2020-10-09 10:45:43,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:45:43,161 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:45:43,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:43,162 INFO L225 Difference]: With dead ends: 329 [2020-10-09 10:45:43,162 INFO L226 Difference]: Without dead ends: 327 [2020-10-09 10:45:43,162 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:45:43,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-09 10:45:43,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 254. [2020-10-09 10:45:43,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-09 10:45:43,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 622 transitions. [2020-10-09 10:45:43,166 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 622 transitions. Word has length 15 [2020-10-09 10:45:43,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:43,166 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 622 transitions. [2020-10-09 10:45:43,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:45:43,166 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 622 transitions. [2020-10-09 10:45:43,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:45:43,167 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:43,167 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:43,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2020-10-09 10:45:43,367 INFO L429 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:43,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:43,368 INFO L82 PathProgramCache]: Analyzing trace with hash 440490001, now seen corresponding path program 272 times [2020-10-09 10:45:43,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:43,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607194912] [2020-10-09 10:45:43,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:43,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:43,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607194912] [2020-10-09 10:45:43,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173807479] [2020-10-09 10:45:43,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:43,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:45:43,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:43,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:45:43,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:47,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:47,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:45:47,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296645395] [2020-10-09 10:45:47,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:45:47,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:47,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:45:47,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=251, Unknown=1, NotChecked=0, Total=342 [2020-10-09 10:45:47,577 INFO L87 Difference]: Start difference. First operand 254 states and 622 transitions. Second operand 19 states. [2020-10-09 10:45:51,940 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-09 10:45:52,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:52,608 INFO L93 Difference]: Finished difference Result 362 states and 839 transitions. [2020-10-09 10:45:52,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:45:52,610 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:45:52,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:52,610 INFO L225 Difference]: With dead ends: 362 [2020-10-09 10:45:52,610 INFO L226 Difference]: Without dead ends: 358 [2020-10-09 10:45:52,611 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=256, Invalid=555, Unknown=1, NotChecked=0, Total=812 [2020-10-09 10:45:52,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-09 10:45:52,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 254. [2020-10-09 10:45:52,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-09 10:45:52,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 622 transitions. [2020-10-09 10:45:52,615 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 622 transitions. Word has length 15 [2020-10-09 10:45:52,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:52,615 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 622 transitions. [2020-10-09 10:45:52,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:45:52,615 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 622 transitions. [2020-10-09 10:45:52,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:45:52,615 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:52,615 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:52,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2020-10-09 10:45:52,816 INFO L429 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:52,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:52,817 INFO L82 PathProgramCache]: Analyzing trace with hash 440518831, now seen corresponding path program 273 times [2020-10-09 10:45:52,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:52,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394157864] [2020-10-09 10:45:52,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:53,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:53,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394157864] [2020-10-09 10:45:53,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825844288] [2020-10-09 10:45:53,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:53,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:45:53,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:53,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:45:53,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:53,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:53,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:45:53,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516899773] [2020-10-09 10:45:53,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:45:53,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:53,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:45:53,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:45:53,600 INFO L87 Difference]: Start difference. First operand 254 states and 622 transitions. Second operand 19 states. [2020-10-09 10:45:54,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:54,503 INFO L93 Difference]: Finished difference Result 348 states and 807 transitions. [2020-10-09 10:45:54,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:45:54,505 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:45:54,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:54,506 INFO L225 Difference]: With dead ends: 348 [2020-10-09 10:45:54,506 INFO L226 Difference]: Without dead ends: 345 [2020-10-09 10:45:54,506 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:45:54,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-09 10:45:54,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 250. [2020-10-09 10:45:54,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-09 10:45:54,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 610 transitions. [2020-10-09 10:45:54,510 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 610 transitions. Word has length 15 [2020-10-09 10:45:54,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:54,510 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 610 transitions. [2020-10-09 10:45:54,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:45:54,510 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 610 transitions. [2020-10-09 10:45:54,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:45:54,511 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:54,511 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:54,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2020-10-09 10:45:54,712 INFO L429 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:54,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:54,712 INFO L82 PathProgramCache]: Analyzing trace with hash 468194670, now seen corresponding path program 274 times [2020-10-09 10:45:54,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:54,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029615399] [2020-10-09 10:45:54,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:54,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:54,966 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:54,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029615399] [2020-10-09 10:45:54,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011923134] [2020-10-09 10:45:54,966 INFO L93 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 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:55,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:45:55,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:55,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:45:55,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:55,493 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:55,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:55,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:45:55,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885293182] [2020-10-09 10:45:55,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:45:55,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:55,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:45:55,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:45:55,494 INFO L87 Difference]: Start difference. First operand 250 states and 610 transitions. Second operand 19 states. [2020-10-09 10:45:56,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:56,612 INFO L93 Difference]: Finished difference Result 322 states and 743 transitions. [2020-10-09 10:45:56,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:45:56,614 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:45:56,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:56,615 INFO L225 Difference]: With dead ends: 322 [2020-10-09 10:45:56,615 INFO L226 Difference]: Without dead ends: 320 [2020-10-09 10:45:56,615 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=312, Invalid=680, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:45:56,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-09 10:45:56,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 253. [2020-10-09 10:45:56,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-09 10:45:56,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 619 transitions. [2020-10-09 10:45:56,619 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 619 transitions. Word has length 15 [2020-10-09 10:45:56,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:56,619 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 619 transitions. [2020-10-09 10:45:56,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:45:56,619 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 619 transitions. [2020-10-09 10:45:56,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:45:56,620 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:56,620 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:56,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2020-10-09 10:45:56,820 INFO L429 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:56,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:56,821 INFO L82 PathProgramCache]: Analyzing trace with hash 468195631, now seen corresponding path program 275 times [2020-10-09 10:45:56,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:56,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3892998] [2020-10-09 10:45:56,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:57,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3892998] [2020-10-09 10:45:57,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134443175] [2020-10-09 10:45:57,068 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:57,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:45:57,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:57,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:45:57,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:57,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:57,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:57,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:45:57,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683617904] [2020-10-09 10:45:57,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:45:57,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:57,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:45:57,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:45:57,573 INFO L87 Difference]: Start difference. First operand 253 states and 619 transitions. Second operand 19 states. [2020-10-09 10:45:58,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:58,677 INFO L93 Difference]: Finished difference Result 356 states and 822 transitions. [2020-10-09 10:45:58,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:45:58,679 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:45:58,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:58,680 INFO L225 Difference]: With dead ends: 356 [2020-10-09 10:45:58,680 INFO L226 Difference]: Without dead ends: 352 [2020-10-09 10:45:58,680 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=291, Invalid=639, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:45:58,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-09 10:45:58,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 253. [2020-10-09 10:45:58,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-09 10:45:58,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 619 transitions. [2020-10-09 10:45:58,684 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 619 transitions. Word has length 15 [2020-10-09 10:45:58,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:58,684 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 619 transitions. [2020-10-09 10:45:58,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:45:58,684 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 619 transitions. [2020-10-09 10:45:58,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:45:58,685 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:58,685 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:58,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2020-10-09 10:45:58,885 INFO L429 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:58,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:58,886 INFO L82 PathProgramCache]: Analyzing trace with hash 468224461, now seen corresponding path program 276 times [2020-10-09 10:45:58,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:58,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266244023] [2020-10-09 10:45:58,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:58,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:59,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266244023] [2020-10-09 10:45:59,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132145496] [2020-10-09 10:45:59,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:59,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:45:59,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:59,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:45:59,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:13,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:13,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:46:13,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627813192] [2020-10-09 10:46:13,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:46:13,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:13,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:46:13,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=250, Unknown=3, NotChecked=0, Total=342 [2020-10-09 10:46:13,682 INFO L87 Difference]: Start difference. First operand 253 states and 619 transitions. Second operand 19 states. [2020-10-09 10:46:18,038 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-09 10:46:28,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:28,959 INFO L93 Difference]: Finished difference Result 372 states and 857 transitions. [2020-10-09 10:46:28,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:46:28,962 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:46:28,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:28,963 INFO L225 Difference]: With dead ends: 372 [2020-10-09 10:46:28,963 INFO L226 Difference]: Without dead ends: 368 [2020-10-09 10:46:28,963 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=278, Invalid=586, Unknown=6, NotChecked=0, Total=870 [2020-10-09 10:46:28,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-10-09 10:46:28,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 254. [2020-10-09 10:46:28,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-09 10:46:28,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 622 transitions. [2020-10-09 10:46:28,966 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 622 transitions. Word has length 15 [2020-10-09 10:46:28,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:28,966 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 622 transitions. [2020-10-09 10:46:28,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:46:28,967 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 622 transitions. [2020-10-09 10:46:28,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:46:28,967 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:28,967 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:29,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2020-10-09 10:46:29,177 INFO L429 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:29,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:29,177 INFO L82 PathProgramCache]: Analyzing trace with hash 469119152, now seen corresponding path program 277 times [2020-10-09 10:46:29,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:29,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596652694] [2020-10-09 10:46:29,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:29,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:29,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596652694] [2020-10-09 10:46:29,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647195251] [2020-10-09 10:46:29,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:29,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:29,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:46:29,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:31,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:31,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:46:31,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986244174] [2020-10-09 10:46:31,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:46:31,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:31,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:46:31,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:46:31,332 INFO L87 Difference]: Start difference. First operand 254 states and 622 transitions. Second operand 19 states. [2020-10-09 10:46:32,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:32,635 INFO L93 Difference]: Finished difference Result 370 states and 850 transitions. [2020-10-09 10:46:32,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:46:32,638 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:46:32,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:32,638 INFO L225 Difference]: With dead ends: 370 [2020-10-09 10:46:32,639 INFO L226 Difference]: Without dead ends: 354 [2020-10-09 10:46:32,639 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=310, Invalid=682, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:46:32,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-10-09 10:46:32,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 248. [2020-10-09 10:46:32,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-09 10:46:32,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 604 transitions. [2020-10-09 10:46:32,643 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 604 transitions. Word has length 15 [2020-10-09 10:46:32,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:32,643 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 604 transitions. [2020-10-09 10:46:32,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:46:32,643 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 604 transitions. [2020-10-09 10:46:32,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:46:32,643 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:32,643 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:32,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:32,844 INFO L429 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:32,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:32,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1327069200, now seen corresponding path program 278 times [2020-10-09 10:46:32,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:32,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919683435] [2020-10-09 10:46:32,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:33,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919683435] [2020-10-09 10:46:33,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707966801] [2020-10-09 10:46:33,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:33,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:46:33,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:33,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:46:33,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:33,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:33,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:46:33,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663162163] [2020-10-09 10:46:33,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:46:33,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:33,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:46:33,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:46:33,514 INFO L87 Difference]: Start difference. First operand 248 states and 604 transitions. Second operand 19 states. [2020-10-09 10:46:34,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:34,596 INFO L93 Difference]: Finished difference Result 311 states and 720 transitions. [2020-10-09 10:46:34,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:46:34,599 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:46:34,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:34,600 INFO L225 Difference]: With dead ends: 311 [2020-10-09 10:46:34,600 INFO L226 Difference]: Without dead ends: 309 [2020-10-09 10:46:34,601 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=361, Invalid=829, Unknown=0, NotChecked=0, Total=1190 [2020-10-09 10:46:34,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-09 10:46:34,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 252. [2020-10-09 10:46:34,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-09 10:46:34,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 615 transitions. [2020-10-09 10:46:34,605 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 615 transitions. Word has length 15 [2020-10-09 10:46:34,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:34,606 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 615 transitions. [2020-10-09 10:46:34,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:46:34,606 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 615 transitions. [2020-10-09 10:46:34,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:46:34,606 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:34,606 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:34,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2020-10-09 10:46:34,816 INFO L429 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:34,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:34,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1327070161, now seen corresponding path program 279 times [2020-10-09 10:46:34,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:34,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962952232] [2020-10-09 10:46:34,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:35,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:35,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962952232] [2020-10-09 10:46:35,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680085570] [2020-10-09 10:46:35,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:35,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:46:35,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:35,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:46:35,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:35,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:35,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:46:35,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986278043] [2020-10-09 10:46:35,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:46:35,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:35,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:46:35,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:46:35,496 INFO L87 Difference]: Start difference. First operand 252 states and 615 transitions. Second operand 19 states. [2020-10-09 10:46:36,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:36,626 INFO L93 Difference]: Finished difference Result 338 states and 777 transitions. [2020-10-09 10:46:36,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:46:36,628 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:46:36,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:36,629 INFO L225 Difference]: With dead ends: 338 [2020-10-09 10:46:36,629 INFO L226 Difference]: Without dead ends: 335 [2020-10-09 10:46:36,629 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=333, Invalid=789, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:46:36,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-09 10:46:36,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 251. [2020-10-09 10:46:36,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-09 10:46:36,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 612 transitions. [2020-10-09 10:46:36,633 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 612 transitions. Word has length 15 [2020-10-09 10:46:36,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:36,634 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 612 transitions. [2020-10-09 10:46:36,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:46:36,634 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 612 transitions. [2020-10-09 10:46:36,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:46:36,634 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:36,634 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:36,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:36,838 INFO L429 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:36,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:36,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1327098991, now seen corresponding path program 280 times [2020-10-09 10:46:36,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:36,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955105822] [2020-10-09 10:46:36,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:37,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955105822] [2020-10-09 10:46:37,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898734994] [2020-10-09 10:46:37,074 INFO L93 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 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:37,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:46:37,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:37,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:46:37,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:37,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:37,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:46:37,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356405032] [2020-10-09 10:46:37,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:46:37,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:37,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:46:37,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:46:37,714 INFO L87 Difference]: Start difference. First operand 251 states and 612 transitions. Second operand 19 states. [2020-10-09 10:46:38,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:38,822 INFO L93 Difference]: Finished difference Result 345 states and 795 transitions. [2020-10-09 10:46:38,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:46:38,825 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:46:38,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:38,826 INFO L225 Difference]: With dead ends: 345 [2020-10-09 10:46:38,826 INFO L226 Difference]: Without dead ends: 341 [2020-10-09 10:46:38,826 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=327, Invalid=729, Unknown=0, NotChecked=0, Total=1056 [2020-10-09 10:46:38,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-09 10:46:38,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 250. [2020-10-09 10:46:38,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-09 10:46:38,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 609 transitions. [2020-10-09 10:46:38,836 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 609 transitions. Word has length 15 [2020-10-09 10:46:38,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:38,836 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 609 transitions. [2020-10-09 10:46:38,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:46:38,836 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 609 transitions. [2020-10-09 10:46:38,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:46:38,837 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:38,837 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:39,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:39,038 INFO L429 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:39,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:39,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1327992721, now seen corresponding path program 281 times [2020-10-09 10:46:39,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:39,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724542921] [2020-10-09 10:46:39,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:39,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:39,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724542921] [2020-10-09 10:46:39,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102950017] [2020-10-09 10:46:39,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:39,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:46:39,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:39,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:46:39,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:39,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:39,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:46:39,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017899357] [2020-10-09 10:46:39,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:46:39,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:39,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:46:39,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:46:39,708 INFO L87 Difference]: Start difference. First operand 250 states and 609 transitions. Second operand 19 states. [2020-10-09 10:46:40,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:40,788 INFO L93 Difference]: Finished difference Result 354 states and 811 transitions. [2020-10-09 10:46:40,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 10:46:40,790 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:46:40,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:40,791 INFO L225 Difference]: With dead ends: 354 [2020-10-09 10:46:40,791 INFO L226 Difference]: Without dead ends: 350 [2020-10-09 10:46:40,791 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:46:40,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-10-09 10:46:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 255. [2020-10-09 10:46:40,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-09 10:46:40,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 622 transitions. [2020-10-09 10:46:40,795 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 622 transitions. Word has length 15 [2020-10-09 10:46:40,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:40,795 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 622 transitions. [2020-10-09 10:46:40,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:46:40,795 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 622 transitions. [2020-10-09 10:46:40,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:46:40,796 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:40,796 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:41,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:41,005 INFO L429 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:41,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:41,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1327993682, now seen corresponding path program 282 times [2020-10-09 10:46:41,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:41,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845090951] [2020-10-09 10:46:41,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:41,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845090951] [2020-10-09 10:46:41,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222380064] [2020-10-09 10:46:41,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:41,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:46:41,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:41,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:46:41,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:41,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:41,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:41,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:46:41,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221071850] [2020-10-09 10:46:41,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:46:41,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:41,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:46:41,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:46:41,665 INFO L87 Difference]: Start difference. First operand 255 states and 622 transitions. Second operand 19 states. [2020-10-09 10:46:42,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:42,532 INFO L93 Difference]: Finished difference Result 356 states and 815 transitions. [2020-10-09 10:46:42,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 10:46:42,535 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:46:42,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:42,535 INFO L225 Difference]: With dead ends: 356 [2020-10-09 10:46:42,535 INFO L226 Difference]: Without dead ends: 341 [2020-10-09 10:46:42,536 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=283, Invalid=647, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:46:42,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-09 10:46:42,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 256. [2020-10-09 10:46:42,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-09 10:46:42,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 622 transitions. [2020-10-09 10:46:42,539 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 622 transitions. Word has length 15 [2020-10-09 10:46:42,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:42,539 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 622 transitions. [2020-10-09 10:46:42,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:46:42,540 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 622 transitions. [2020-10-09 10:46:42,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:46:42,540 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:42,540 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:42,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2020-10-09 10:46:42,741 INFO L429 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:42,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:42,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1328022512, now seen corresponding path program 283 times [2020-10-09 10:46:42,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:42,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453102250] [2020-10-09 10:46:42,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:42,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:42,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453102250] [2020-10-09 10:46:42,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770203374] [2020-10-09 10:46:42,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:43,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:46:43,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:43,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:43,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:43,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:46:43,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736372761] [2020-10-09 10:46:43,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:46:43,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:43,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:46:43,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:46:43,432 INFO L87 Difference]: Start difference. First operand 256 states and 622 transitions. Second operand 19 states. [2020-10-09 10:46:44,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:44,606 INFO L93 Difference]: Finished difference Result 348 states and 796 transitions. [2020-10-09 10:46:44,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-09 10:46:44,609 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:46:44,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:44,609 INFO L225 Difference]: With dead ends: 348 [2020-10-09 10:46:44,610 INFO L226 Difference]: Without dead ends: 337 [2020-10-09 10:46:44,610 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=366, Invalid=824, Unknown=0, NotChecked=0, Total=1190 [2020-10-09 10:46:44,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-09 10:46:44,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 252. [2020-10-09 10:46:44,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-09 10:46:44,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 614 transitions. [2020-10-09 10:46:44,613 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 614 transitions. Word has length 15 [2020-10-09 10:46:44,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:44,613 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 614 transitions. [2020-10-09 10:46:44,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:46:44,614 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 614 transitions. [2020-10-09 10:46:44,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:46:44,614 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:44,614 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:44,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2020-10-09 10:46:44,815 INFO L429 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:44,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:44,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1355699312, now seen corresponding path program 284 times [2020-10-09 10:46:44,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:44,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93427635] [2020-10-09 10:46:44,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:45,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93427635] [2020-10-09 10:46:45,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995752914] [2020-10-09 10:46:45,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:45,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:46:45,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:45,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:46:45,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:45,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:45,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:45,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:46:45,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409856633] [2020-10-09 10:46:45,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:46:45,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:45,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:46:45,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:46:45,609 INFO L87 Difference]: Start difference. First operand 252 states and 614 transitions. Second operand 19 states. [2020-10-09 10:46:47,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:47,187 INFO L93 Difference]: Finished difference Result 344 states and 788 transitions. [2020-10-09 10:46:47,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:46:47,190 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:46:47,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:47,190 INFO L225 Difference]: With dead ends: 344 [2020-10-09 10:46:47,191 INFO L226 Difference]: Without dead ends: 331 [2020-10-09 10:46:47,191 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=378, Invalid=882, Unknown=0, NotChecked=0, Total=1260 [2020-10-09 10:46:47,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-09 10:46:47,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 252. [2020-10-09 10:46:47,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-09 10:46:47,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 612 transitions. [2020-10-09 10:46:47,200 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 612 transitions. Word has length 15 [2020-10-09 10:46:47,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:47,200 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 612 transitions. [2020-10-09 10:46:47,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:46:47,200 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 612 transitions. [2020-10-09 10:46:47,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:46:47,200 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:47,200 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:47,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2020-10-09 10:46:47,401 INFO L429 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:47,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:47,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1355728142, now seen corresponding path program 285 times [2020-10-09 10:46:47,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:47,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025240796] [2020-10-09 10:46:47,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:47,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:47,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:47,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025240796] [2020-10-09 10:46:47,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059325919] [2020-10-09 10:46:47,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:47,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:46:47,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:47,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:46:47,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:54,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:54,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:46:54,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852135692] [2020-10-09 10:46:54,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:46:54,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:54,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:46:54,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=260, Unknown=2, NotChecked=0, Total=342 [2020-10-09 10:46:54,041 INFO L87 Difference]: Start difference. First operand 252 states and 612 transitions. Second operand 19 states. [2020-10-09 10:46:58,547 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-09 10:47:02,733 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-10-09 10:47:07,048 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-09 10:47:23,794 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-09 10:47:27,954 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 41 [2020-10-09 10:47:30,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:47:30,343 INFO L93 Difference]: Finished difference Result 330 states and 756 transitions. [2020-10-09 10:47:30,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 10:47:30,345 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:47:30,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:47:30,346 INFO L225 Difference]: With dead ends: 330 [2020-10-09 10:47:30,346 INFO L226 Difference]: Without dead ends: 326 [2020-10-09 10:47:30,347 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 40.4s TimeCoverageRelationStatistics Valid=353, Invalid=827, Unknown=10, NotChecked=0, Total=1190 [2020-10-09 10:47:30,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-09 10:47:30,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 246. [2020-10-09 10:47:30,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-09 10:47:30,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 600 transitions. [2020-10-09 10:47:30,350 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 600 transitions. Word has length 15 [2020-10-09 10:47:30,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:47:30,351 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 600 transitions. [2020-10-09 10:47:30,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:47:30,351 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 600 transitions. [2020-10-09 10:47:30,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:47:30,351 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:47:30,351 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:47:30,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2020-10-09 10:47:30,552 INFO L429 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:47:30,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:47:30,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1363216958, now seen corresponding path program 286 times [2020-10-09 10:47:30,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:47:30,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786811578] [2020-10-09 10:47:30,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:47:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:47:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:30,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786811578] [2020-10-09 10:47:30,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534554445] [2020-10-09 10:47:30,872 INFO L93 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 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:30,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:47:30,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:47:30,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:47:30,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:47:31,308 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:31,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:47:31,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:47:31,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570032968] [2020-10-09 10:47:31,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:47:31,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:47:31,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:47:31,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:47:31,309 INFO L87 Difference]: Start difference. First operand 246 states and 600 transitions. Second operand 19 states. [2020-10-09 10:47:31,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:47:31,909 INFO L93 Difference]: Finished difference Result 315 states and 727 transitions. [2020-10-09 10:47:31,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:47:31,912 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:47:31,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:47:31,912 INFO L225 Difference]: With dead ends: 315 [2020-10-09 10:47:31,912 INFO L226 Difference]: Without dead ends: 313 [2020-10-09 10:47:31,913 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:47:31,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-09 10:47:31,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 250. [2020-10-09 10:47:31,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-09 10:47:31,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 612 transitions. [2020-10-09 10:47:31,916 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 612 transitions. Word has length 15 [2020-10-09 10:47:31,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:47:31,916 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 612 transitions. [2020-10-09 10:47:31,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:47:31,917 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 612 transitions. [2020-10-09 10:47:31,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:47:31,917 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:47:31,917 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:47:32,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:32,118 INFO L429 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:47:32,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:47:32,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1363188128, now seen corresponding path program 287 times [2020-10-09 10:47:32,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:47:32,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033198721] [2020-10-09 10:47:32,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:47:32,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:47:32,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:32,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033198721] [2020-10-09 10:47:32,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832770468] [2020-10-09 10:47:32,420 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:32,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:47:32,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:47:32,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:47:32,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:47:32,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:32,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:47:32,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:47:32,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992807725] [2020-10-09 10:47:32,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:47:32,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:47:32,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:47:32,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:47:32,935 INFO L87 Difference]: Start difference. First operand 250 states and 612 transitions. Second operand 19 states. [2020-10-09 10:47:33,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:47:33,752 INFO L93 Difference]: Finished difference Result 335 states and 777 transitions. [2020-10-09 10:47:33,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:47:33,755 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:47:33,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:47:33,756 INFO L225 Difference]: With dead ends: 335 [2020-10-09 10:47:33,756 INFO L226 Difference]: Without dead ends: 332 [2020-10-09 10:47:33,756 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=235, Invalid=521, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:47:33,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-10-09 10:47:33,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 248. [2020-10-09 10:47:33,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-09 10:47:33,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 606 transitions. [2020-10-09 10:47:33,759 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 606 transitions. Word has length 15 [2020-10-09 10:47:33,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:47:33,760 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 606 transitions. [2020-10-09 10:47:33,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:47:33,760 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 606 transitions. [2020-10-09 10:47:33,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:47:33,760 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:47:33,760 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:47:33,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2020-10-09 10:47:33,961 INFO L429 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:47:33,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:47:33,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1362294398, now seen corresponding path program 288 times [2020-10-09 10:47:33,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:47:33,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79423451] [2020-10-09 10:47:33,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:47:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:47:34,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:34,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79423451] [2020-10-09 10:47:34,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404880045] [2020-10-09 10:47:34,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:34,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:47:34,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:47:34,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:47:34,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:47:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:34,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:47:34,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:47:34,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287236987] [2020-10-09 10:47:34,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:47:34,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:47:34,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:47:34,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:47:34,740 INFO L87 Difference]: Start difference. First operand 248 states and 606 transitions. Second operand 19 states. [2020-10-09 10:47:35,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:47:35,774 INFO L93 Difference]: Finished difference Result 327 states and 755 transitions. [2020-10-09 10:47:35,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:47:35,776 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:47:35,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:47:35,777 INFO L225 Difference]: With dead ends: 327 [2020-10-09 10:47:35,777 INFO L226 Difference]: Without dead ends: 325 [2020-10-09 10:47:35,778 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=271, Invalid=599, Unknown=0, NotChecked=0, Total=870 [2020-10-09 10:47:35,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-09 10:47:35,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 250. [2020-10-09 10:47:35,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-09 10:47:35,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 612 transitions. [2020-10-09 10:47:35,781 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 612 transitions. Word has length 15 [2020-10-09 10:47:35,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:47:35,781 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 612 transitions. [2020-10-09 10:47:35,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:47:35,781 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 612 transitions. [2020-10-09 10:47:35,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:47:35,782 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:47:35,782 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:47:35,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2020-10-09 10:47:35,982 INFO L429 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:47:35,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:47:35,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1362293437, now seen corresponding path program 289 times [2020-10-09 10:47:35,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:47:35,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140241912] [2020-10-09 10:47:35,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:47:35,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:47:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:36,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140241912] [2020-10-09 10:47:36,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185122647] [2020-10-09 10:47:36,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:47:36,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:47:36,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:47:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:40,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:47:40,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:47:40,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392086828] [2020-10-09 10:47:40,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:47:40,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:47:40,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:47:40,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=261, Unknown=1, NotChecked=0, Total=342 [2020-10-09 10:47:40,702 INFO L87 Difference]: Start difference. First operand 250 states and 612 transitions. Second operand 19 states. [2020-10-09 10:47:45,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:47:45,950 INFO L93 Difference]: Finished difference Result 354 states and 818 transitions. [2020-10-09 10:47:45,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:47:45,953 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:47:45,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:47:45,954 INFO L225 Difference]: With dead ends: 354 [2020-10-09 10:47:45,954 INFO L226 Difference]: Without dead ends: 350 [2020-10-09 10:47:45,954 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=260, Invalid=607, Unknown=3, NotChecked=0, Total=870 [2020-10-09 10:47:45,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-10-09 10:47:45,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 250. [2020-10-09 10:47:45,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-09 10:47:45,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 612 transitions. [2020-10-09 10:47:45,958 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 612 transitions. Word has length 15 [2020-10-09 10:47:45,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:47:45,958 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 612 transitions. [2020-10-09 10:47:45,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:47:45,958 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 612 transitions. [2020-10-09 10:47:45,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:47:45,959 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:47:45,959 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:47:46,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:46,161 INFO L429 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:47:46,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:47:46,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1362264607, now seen corresponding path program 290 times [2020-10-09 10:47:46,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:47:46,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702561524] [2020-10-09 10:47:46,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:47:46,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:47:46,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:46,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702561524] [2020-10-09 10:47:46,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482391874] [2020-10-09 10:47:46,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:46,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:47:46,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:47:46,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:47:46,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:47:47,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:47,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:47:47,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:47:47,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429903167] [2020-10-09 10:47:47,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:47:47,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:47:47,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:47:47,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:47:47,085 INFO L87 Difference]: Start difference. First operand 250 states and 612 transitions. Second operand 19 states. [2020-10-09 10:47:48,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:47:48,183 INFO L93 Difference]: Finished difference Result 341 states and 791 transitions. [2020-10-09 10:47:48,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:47:48,186 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:47:48,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:47:48,186 INFO L225 Difference]: With dead ends: 341 [2020-10-09 10:47:48,186 INFO L226 Difference]: Without dead ends: 338 [2020-10-09 10:47:48,187 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2020-10-09 10:47:48,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-10-09 10:47:48,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 246. [2020-10-09 10:47:48,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-09 10:47:48,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 600 transitions. [2020-10-09 10:47:48,190 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 600 transitions. Word has length 15 [2020-10-09 10:47:48,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:47:48,190 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 600 transitions. [2020-10-09 10:47:48,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:47:48,190 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 600 transitions. [2020-10-09 10:47:48,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:47:48,190 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:47:48,190 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:47:48,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable318 [2020-10-09 10:47:48,391 INFO L429 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:47:48,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:47:48,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1334588768, now seen corresponding path program 291 times [2020-10-09 10:47:48,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:47:48,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442339390] [2020-10-09 10:47:48,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:47:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:47:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:48,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442339390] [2020-10-09 10:47:48,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411794132] [2020-10-09 10:47:48,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:48,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:47:48,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:47:48,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:47:48,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:47:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:49,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:47:49,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:47:49,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918845673] [2020-10-09 10:47:49,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:47:49,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:47:49,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:47:49,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:47:49,203 INFO L87 Difference]: Start difference. First operand 246 states and 600 transitions. Second operand 19 states. [2020-10-09 10:47:50,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:47:50,539 INFO L93 Difference]: Finished difference Result 314 states and 724 transitions. [2020-10-09 10:47:50,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 10:47:50,541 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:47:50,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:47:50,542 INFO L225 Difference]: With dead ends: 314 [2020-10-09 10:47:50,542 INFO L226 Difference]: Without dead ends: 312 [2020-10-09 10:47:50,542 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2020-10-09 10:47:50,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-09 10:47:50,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 249. [2020-10-09 10:47:50,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-09 10:47:50,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 609 transitions. [2020-10-09 10:47:50,546 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 609 transitions. Word has length 15 [2020-10-09 10:47:50,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:47:50,546 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 609 transitions. [2020-10-09 10:47:50,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:47:50,546 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 609 transitions. [2020-10-09 10:47:50,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:47:50,546 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:47:50,546 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:47:50,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:50,747 INFO L429 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:47:50,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:47:50,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1334587807, now seen corresponding path program 292 times [2020-10-09 10:47:50,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:47:50,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785889813] [2020-10-09 10:47:50,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:47:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:47:50,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:50,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785889813] [2020-10-09 10:47:50,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713788136] [2020-10-09 10:47:50,994 INFO L93 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 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:51,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:47:51,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:47:51,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:47:51,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:47:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:51,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:47:51,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:47:51,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361454284] [2020-10-09 10:47:51,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:47:51,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:47:51,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:47:51,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:47:51,591 INFO L87 Difference]: Start difference. First operand 249 states and 609 transitions. Second operand 19 states. [2020-10-09 10:47:52,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:47:52,871 INFO L93 Difference]: Finished difference Result 344 states and 794 transitions. [2020-10-09 10:47:52,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 10:47:52,874 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:47:52,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:47:52,875 INFO L225 Difference]: With dead ends: 344 [2020-10-09 10:47:52,875 INFO L226 Difference]: Without dead ends: 340 [2020-10-09 10:47:52,875 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:47:52,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-09 10:47:52,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 249. [2020-10-09 10:47:52,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-09 10:47:52,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 609 transitions. [2020-10-09 10:47:52,878 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 609 transitions. Word has length 15 [2020-10-09 10:47:52,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:47:52,878 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 609 transitions. [2020-10-09 10:47:52,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:47:52,878 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 609 transitions. [2020-10-09 10:47:52,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:47:52,879 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:47:52,879 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:47:53,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2020-10-09 10:47:53,079 INFO L429 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:47:53,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:47:53,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1334558977, now seen corresponding path program 293 times [2020-10-09 10:47:53,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:47:53,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205118512] [2020-10-09 10:47:53,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:47:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:47:53,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:53,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205118512] [2020-10-09 10:47:53,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98188805] [2020-10-09 10:47:53,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:53,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:47:53,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:47:53,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:47:53,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:09,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:09,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:09,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:48:09,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008387635] [2020-10-09 10:48:09,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:48:09,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:09,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:48:09,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=260, Unknown=5, NotChecked=0, Total=342 [2020-10-09 10:48:09,722 INFO L87 Difference]: Start difference. First operand 249 states and 609 transitions. Second operand 19 states. [2020-10-09 10:48:14,200 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-09 10:48:21,214 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-10-09 10:48:28,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:28,156 INFO L93 Difference]: Finished difference Result 353 states and 810 transitions. [2020-10-09 10:48:28,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 10:48:28,159 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:48:28,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:28,160 INFO L225 Difference]: With dead ends: 353 [2020-10-09 10:48:28,160 INFO L226 Difference]: Without dead ends: 349 [2020-10-09 10:48:28,161 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=280, Invalid=644, Unknown=6, NotChecked=0, Total=930 [2020-10-09 10:48:28,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-10-09 10:48:28,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 250. [2020-10-09 10:48:28,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-09 10:48:28,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 612 transitions. [2020-10-09 10:48:28,164 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 612 transitions. Word has length 15 [2020-10-09 10:48:28,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:28,165 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 612 transitions. [2020-10-09 10:48:28,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:48:28,165 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 612 transitions. [2020-10-09 10:48:28,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:48:28,165 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:28,165 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:28,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2020-10-09 10:48:28,366 INFO L429 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:28,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:28,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1333664286, now seen corresponding path program 294 times [2020-10-09 10:48:28,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:28,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275565235] [2020-10-09 10:48:28,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:28,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275565235] [2020-10-09 10:48:28,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927753784] [2020-10-09 10:48:28,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:28,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:48:28,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:28,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:48:28,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:30,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:30,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:30,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:48:30,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253111126] [2020-10-09 10:48:30,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:48:30,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:30,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:48:30,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:48:30,464 INFO L87 Difference]: Start difference. First operand 250 states and 612 transitions. Second operand 19 states. [2020-10-09 10:48:32,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:32,066 INFO L93 Difference]: Finished difference Result 352 states and 803 transitions. [2020-10-09 10:48:32,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 10:48:32,069 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:48:32,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:32,070 INFO L225 Difference]: With dead ends: 352 [2020-10-09 10:48:32,070 INFO L226 Difference]: Without dead ends: 336 [2020-10-09 10:48:32,070 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=314, Invalid=742, Unknown=0, NotChecked=0, Total=1056 [2020-10-09 10:48:32,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-09 10:48:32,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 244. [2020-10-09 10:48:32,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-09 10:48:32,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 592 transitions. [2020-10-09 10:48:32,074 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 592 transitions. Word has length 15 [2020-10-09 10:48:32,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:32,074 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 592 transitions. [2020-10-09 10:48:32,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:48:32,074 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 592 transitions. [2020-10-09 10:48:32,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:48:32,074 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:32,075 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:32,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2020-10-09 10:48:32,275 INFO L429 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:32,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:32,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1211028048, now seen corresponding path program 295 times [2020-10-09 10:48:32,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:32,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779823487] [2020-10-09 10:48:32,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:32,613 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:32,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779823487] [2020-10-09 10:48:32,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529415446] [2020-10-09 10:48:32,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:32,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:48:32,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:33,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:33,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:48:33,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440151991] [2020-10-09 10:48:33,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:48:33,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:33,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:48:33,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:48:33,088 INFO L87 Difference]: Start difference. First operand 244 states and 592 transitions. Second operand 19 states. [2020-10-09 10:48:33,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:33,788 INFO L93 Difference]: Finished difference Result 304 states and 700 transitions. [2020-10-09 10:48:33,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:48:33,791 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:48:33,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:33,791 INFO L225 Difference]: With dead ends: 304 [2020-10-09 10:48:33,791 INFO L226 Difference]: Without dead ends: 302 [2020-10-09 10:48:33,791 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=208, Invalid=494, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:48:33,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-10-09 10:48:33,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 246. [2020-10-09 10:48:33,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-09 10:48:33,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 598 transitions. [2020-10-09 10:48:33,799 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 598 transitions. Word has length 15 [2020-10-09 10:48:33,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:33,799 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 598 transitions. [2020-10-09 10:48:33,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:48:33,799 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 598 transitions. [2020-10-09 10:48:33,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:48:33,799 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:33,800 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:34,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2020-10-09 10:48:34,000 INFO L429 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:34,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:34,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1211056878, now seen corresponding path program 296 times [2020-10-09 10:48:34,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:34,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934960469] [2020-10-09 10:48:34,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:34,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934960469] [2020-10-09 10:48:34,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123109760] [2020-10-09 10:48:34,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:34,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:48:34,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:34,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:48:34,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:34,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:34,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:34,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:48:34,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295408549] [2020-10-09 10:48:34,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:48:34,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:34,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:48:34,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:48:34,825 INFO L87 Difference]: Start difference. First operand 246 states and 598 transitions. Second operand 19 states. [2020-10-09 10:48:35,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:35,802 INFO L93 Difference]: Finished difference Result 321 states and 741 transitions. [2020-10-09 10:48:35,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:48:35,805 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:48:35,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:35,806 INFO L225 Difference]: With dead ends: 321 [2020-10-09 10:48:35,806 INFO L226 Difference]: Without dead ends: 318 [2020-10-09 10:48:35,806 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:48:35,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-09 10:48:35,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 244. [2020-10-09 10:48:35,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-09 10:48:35,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 592 transitions. [2020-10-09 10:48:35,809 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 592 transitions. Word has length 15 [2020-10-09 10:48:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:35,810 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 592 transitions. [2020-10-09 10:48:35,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:48:35,810 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 592 transitions. [2020-10-09 10:48:35,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:48:35,810 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:35,810 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:36,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:36,011 INFO L429 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:36,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:36,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1211950608, now seen corresponding path program 297 times [2020-10-09 10:48:36,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:36,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292581905] [2020-10-09 10:48:36,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:36,278 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:36,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292581905] [2020-10-09 10:48:36,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929453644] [2020-10-09 10:48:36,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:36,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:48:36,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:36,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:48:36,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:36,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:36,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:36,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:48:36,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056667955] [2020-10-09 10:48:36,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:48:36,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:36,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:48:36,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:48:36,845 INFO L87 Difference]: Start difference. First operand 244 states and 592 transitions. Second operand 19 states. [2020-10-09 10:48:38,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:38,046 INFO L93 Difference]: Finished difference Result 311 states and 716 transitions. [2020-10-09 10:48:38,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:48:38,050 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:48:38,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:38,050 INFO L225 Difference]: With dead ends: 311 [2020-10-09 10:48:38,050 INFO L226 Difference]: Without dead ends: 309 [2020-10-09 10:48:38,051 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:48:38,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-09 10:48:38,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 246. [2020-10-09 10:48:38,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-09 10:48:38,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 598 transitions. [2020-10-09 10:48:38,054 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 598 transitions. Word has length 15 [2020-10-09 10:48:38,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:38,054 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 598 transitions. [2020-10-09 10:48:38,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:48:38,055 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 598 transitions. [2020-10-09 10:48:38,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:48:38,055 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:38,055 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:38,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2020-10-09 10:48:38,256 INFO L429 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:38,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:38,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1211951569, now seen corresponding path program 298 times [2020-10-09 10:48:38,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:38,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519518477] [2020-10-09 10:48:38,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:38,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519518477] [2020-10-09 10:48:38,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356895723] [2020-10-09 10:48:38,523 INFO L93 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 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:38,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:48:38,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:38,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:48:38,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:43,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:43,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:43,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:48:43,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239776495] [2020-10-09 10:48:43,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:48:43,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:43,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:48:43,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=267, Unknown=1, NotChecked=0, Total=342 [2020-10-09 10:48:43,191 INFO L87 Difference]: Start difference. First operand 246 states and 598 transitions. Second operand 19 states. [2020-10-09 10:48:47,706 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-09 10:48:48,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:48,679 INFO L93 Difference]: Finished difference Result 335 states and 770 transitions. [2020-10-09 10:48:48,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 10:48:48,682 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:48:48,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:48,683 INFO L225 Difference]: With dead ends: 335 [2020-10-09 10:48:48,683 INFO L226 Difference]: Without dead ends: 331 [2020-10-09 10:48:48,684 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=272, Invalid=657, Unknown=1, NotChecked=0, Total=930 [2020-10-09 10:48:48,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-09 10:48:48,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 246. [2020-10-09 10:48:48,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-09 10:48:48,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 598 transitions. [2020-10-09 10:48:48,687 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 598 transitions. Word has length 15 [2020-10-09 10:48:48,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:48,687 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 598 transitions. [2020-10-09 10:48:48,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:48:48,688 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 598 transitions. [2020-10-09 10:48:48,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:48:48,688 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:48,688 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:48,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2020-10-09 10:48:48,891 INFO L429 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:48,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:48,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1211980399, now seen corresponding path program 299 times [2020-10-09 10:48:48,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:48,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904789669] [2020-10-09 10:48:48,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:49,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:49,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904789669] [2020-10-09 10:48:49,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159355261] [2020-10-09 10:48:49,158 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:49,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:48:49,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:49,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:48:49,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:49,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:49,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:49,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:48:49,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473775656] [2020-10-09 10:48:49,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:48:49,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:49,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:48:49,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:48:49,802 INFO L87 Difference]: Start difference. First operand 246 states and 598 transitions. Second operand 19 states. [2020-10-09 10:48:51,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:51,076 INFO L93 Difference]: Finished difference Result 321 states and 740 transitions. [2020-10-09 10:48:51,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 10:48:51,079 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:48:51,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:51,080 INFO L225 Difference]: With dead ends: 321 [2020-10-09 10:48:51,080 INFO L226 Difference]: Without dead ends: 318 [2020-10-09 10:48:51,080 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:48:51,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-09 10:48:51,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 242. [2020-10-09 10:48:51,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-09 10:48:51,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 586 transitions. [2020-10-09 10:48:51,084 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 586 transitions. Word has length 15 [2020-10-09 10:48:51,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:51,084 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 586 transitions. [2020-10-09 10:48:51,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:48:51,084 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 586 transitions. [2020-10-09 10:48:51,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:48:51,085 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:51,085 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:51,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:51,285 INFO L429 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:51,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:51,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1848257538, now seen corresponding path program 300 times [2020-10-09 10:48:51,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:51,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096787494] [2020-10-09 10:48:51,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:51,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:51,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096787494] [2020-10-09 10:48:51,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436969362] [2020-10-09 10:48:51,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:51,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:48:51,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:51,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:48:51,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:52,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:52,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:48:52,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195371071] [2020-10-09 10:48:52,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:48:52,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:52,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:48:52,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:48:52,055 INFO L87 Difference]: Start difference. First operand 242 states and 586 transitions. Second operand 19 states. [2020-10-09 10:48:52,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:52,857 INFO L93 Difference]: Finished difference Result 293 states and 675 transitions. [2020-10-09 10:48:52,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:48:52,860 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:48:52,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:52,861 INFO L225 Difference]: With dead ends: 293 [2020-10-09 10:48:52,861 INFO L226 Difference]: Without dead ends: 291 [2020-10-09 10:48:52,861 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=228, Invalid=528, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:48:52,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-09 10:48:52,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 242. [2020-10-09 10:48:52,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-09 10:48:52,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 586 transitions. [2020-10-09 10:48:52,864 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 586 transitions. Word has length 15 [2020-10-09 10:48:52,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:52,865 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 586 transitions. [2020-10-09 10:48:52,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:48:52,865 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 586 transitions. [2020-10-09 10:48:52,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:48:52,865 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:52,865 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:53,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:53,066 INFO L429 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:53,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:53,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1848286368, now seen corresponding path program 301 times [2020-10-09 10:48:53,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:53,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224653244] [2020-10-09 10:48:53,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:53,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:53,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224653244] [2020-10-09 10:48:53,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339428081] [2020-10-09 10:48:53,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:53,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:48:53,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:55,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:55,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:48:55,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296373347] [2020-10-09 10:48:55,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:48:55,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:55,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:48:55,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:48:55,917 INFO L87 Difference]: Start difference. First operand 242 states and 586 transitions. Second operand 19 states. [2020-10-09 10:48:57,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:57,004 INFO L93 Difference]: Finished difference Result 306 states and 707 transitions. [2020-10-09 10:48:57,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:48:57,007 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:48:57,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:57,007 INFO L225 Difference]: With dead ends: 306 [2020-10-09 10:48:57,007 INFO L226 Difference]: Without dead ends: 303 [2020-10-09 10:48:57,008 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=263, Invalid=607, Unknown=0, NotChecked=0, Total=870 [2020-10-09 10:48:57,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-09 10:48:57,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 240. [2020-10-09 10:48:57,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-09 10:48:57,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 580 transitions. [2020-10-09 10:48:57,012 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 580 transitions. Word has length 15 [2020-10-09 10:48:57,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:57,012 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 580 transitions. [2020-10-09 10:48:57,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:48:57,012 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 580 transitions. [2020-10-09 10:48:57,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:48:57,012 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:57,012 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:57,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:57,213 INFO L429 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:57,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:57,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1868813328, now seen corresponding path program 302 times [2020-10-09 10:48:57,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:57,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594887593] [2020-10-09 10:48:57,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:57,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594887593] [2020-10-09 10:48:57,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92080827] [2020-10-09 10:48:57,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:57,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:48:57,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:57,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:48:57,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:57,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:57,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:48:57,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732278777] [2020-10-09 10:48:57,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:48:57,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:57,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:48:57,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:48:57,969 INFO L87 Difference]: Start difference. First operand 240 states and 580 transitions. Second operand 19 states. [2020-10-09 10:48:58,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:58,858 INFO L93 Difference]: Finished difference Result 281 states and 652 transitions. [2020-10-09 10:48:58,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:48:58,861 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:48:58,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:58,861 INFO L225 Difference]: With dead ends: 281 [2020-10-09 10:48:58,861 INFO L226 Difference]: Without dead ends: 279 [2020-10-09 10:48:58,861 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=252, Invalid=560, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:48:58,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-09 10:48:58,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 236. [2020-10-09 10:48:58,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-09 10:48:58,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 574 transitions. [2020-10-09 10:48:58,865 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 574 transitions. Word has length 15 [2020-10-09 10:48:58,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:58,865 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 574 transitions. [2020-10-09 10:48:58,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:48:58,865 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 574 transitions. [2020-10-09 10:48:58,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:48:58,865 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:58,865 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:59,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2020-10-09 10:48:59,066 INFO L429 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:59,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:59,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1869505248, now seen corresponding path program 303 times [2020-10-09 10:48:59,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:59,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902051283] [2020-10-09 10:48:59,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:59,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:59,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902051283] [2020-10-09 10:48:59,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753072977] [2020-10-09 10:48:59,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:59,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:48:59,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:59,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:48:59,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:59,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:59,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:48:59,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042476181] [2020-10-09 10:48:59,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:48:59,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:59,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:48:59,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:48:59,849 INFO L87 Difference]: Start difference. First operand 236 states and 574 transitions. Second operand 19 states. [2020-10-09 10:49:00,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:49:00,859 INFO L93 Difference]: Finished difference Result 286 states and 682 transitions. [2020-10-09 10:49:00,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:49:00,862 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:49:00,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:49:00,863 INFO L225 Difference]: With dead ends: 286 [2020-10-09 10:49:00,863 INFO L226 Difference]: Without dead ends: 284 [2020-10-09 10:49:00,863 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=273, Invalid=597, Unknown=0, NotChecked=0, Total=870 [2020-10-09 10:49:00,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-09 10:49:00,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 238. [2020-10-09 10:49:00,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-09 10:49:00,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 579 transitions. [2020-10-09 10:49:00,866 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 579 transitions. Word has length 15 [2020-10-09 10:49:00,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:49:00,866 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 579 transitions. [2020-10-09 10:49:00,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:49:00,866 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 579 transitions. [2020-10-09 10:49:00,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:49:00,867 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:49:00,867 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:49:01,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2020-10-09 10:49:01,068 INFO L429 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:49:01,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:49:01,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1869527568, now seen corresponding path program 304 times [2020-10-09 10:49:01,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:49:01,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404459671] [2020-10-09 10:49:01,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:49:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:49:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:01,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404459671] [2020-10-09 10:49:01,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350426568] [2020-10-09 10:49:01,325 INFO L93 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 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:01,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:49:01,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:49:01,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:49:01,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:49:01,766 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:49:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:01,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:49:01,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:49:01,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381918468] [2020-10-09 10:49:01,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:49:01,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:49:01,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:49:01,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:49:01,808 INFO L87 Difference]: Start difference. First operand 238 states and 579 transitions. Second operand 19 states. [2020-10-09 10:49:03,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:49:03,061 INFO L93 Difference]: Finished difference Result 309 states and 740 transitions. [2020-10-09 10:49:03,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:49:03,064 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:49:03,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:49:03,065 INFO L225 Difference]: With dead ends: 309 [2020-10-09 10:49:03,065 INFO L226 Difference]: Without dead ends: 305 [2020-10-09 10:49:03,066 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=338, Invalid=718, Unknown=0, NotChecked=0, Total=1056 [2020-10-09 10:49:03,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-10-09 10:49:03,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 238. [2020-10-09 10:49:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-09 10:49:03,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 580 transitions. [2020-10-09 10:49:03,069 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 580 transitions. Word has length 15 [2020-10-09 10:49:03,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:49:03,069 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 580 transitions. [2020-10-09 10:49:03,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:49:03,069 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 580 transitions. [2020-10-09 10:49:03,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:49:03,070 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:49:03,070 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:49:03,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2020-10-09 10:49:03,270 INFO L429 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:49:03,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:49:03,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1869735888, now seen corresponding path program 305 times [2020-10-09 10:49:03,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:49:03,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999827491] [2020-10-09 10:49:03,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:49:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:49:03,518 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:03,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999827491] [2020-10-09 10:49:03,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525230484] [2020-10-09 10:49:03,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:03,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:49:03,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:49:03,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:49:03,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:49:04,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:04,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:49:04,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:49:04,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210383401] [2020-10-09 10:49:04,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:49:04,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:49:04,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:49:04,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:49:04,130 INFO L87 Difference]: Start difference. First operand 238 states and 580 transitions. Second operand 19 states. [2020-10-09 10:49:05,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:49:05,326 INFO L93 Difference]: Finished difference Result 328 states and 772 transitions. [2020-10-09 10:49:05,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:49:05,329 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:49:05,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:49:05,330 INFO L225 Difference]: With dead ends: 328 [2020-10-09 10:49:05,330 INFO L226 Difference]: Without dead ends: 325 [2020-10-09 10:49:05,330 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=263, Invalid=667, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:49:05,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-09 10:49:05,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 240. [2020-10-09 10:49:05,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-09 10:49:05,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 586 transitions. [2020-10-09 10:49:05,333 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 586 transitions. Word has length 15 [2020-10-09 10:49:05,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:49:05,334 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 586 transitions. [2020-10-09 10:49:05,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:49:05,334 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 586 transitions. [2020-10-09 10:49:05,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:49:05,334 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:49:05,334 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:49:05,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2020-10-09 10:49:05,535 INFO L429 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:49:05,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:49:05,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1870398978, now seen corresponding path program 306 times [2020-10-09 10:49:05,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:49:05,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803629036] [2020-10-09 10:49:05,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:49:05,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:49:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:05,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803629036] [2020-10-09 10:49:05,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079221659] [2020-10-09 10:49:05,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:05,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:49:05,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:49:05,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:49:05,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:49:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:06,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:49:06,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:49:06,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558084809] [2020-10-09 10:49:06,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:49:06,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:49:06,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:49:06,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:49:06,394 INFO L87 Difference]: Start difference. First operand 240 states and 586 transitions. Second operand 19 states. [2020-10-09 10:49:07,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:49:07,958 INFO L93 Difference]: Finished difference Result 343 states and 820 transitions. [2020-10-09 10:49:07,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 10:49:07,962 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:49:07,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:49:07,962 INFO L225 Difference]: With dead ends: 343 [2020-10-09 10:49:07,963 INFO L226 Difference]: Without dead ends: 340 [2020-10-09 10:49:07,963 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:49:07,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-09 10:49:07,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 244. [2020-10-09 10:49:07,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-09 10:49:07,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 598 transitions. [2020-10-09 10:49:07,966 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 598 transitions. Word has length 15 [2020-10-09 10:49:07,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:49:07,967 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 598 transitions. [2020-10-09 10:49:07,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:49:07,967 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 598 transitions. [2020-10-09 10:49:07,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:49:07,967 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:49:07,967 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:49:08,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable334,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:08,168 INFO L429 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:49:08,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:49:08,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1870421298, now seen corresponding path program 307 times [2020-10-09 10:49:08,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:49:08,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303507144] [2020-10-09 10:49:08,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:49:08,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:49:08,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:08,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303507144] [2020-10-09 10:49:08,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416526342] [2020-10-09 10:49:08,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:49:08,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:49:08,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:49:10,958 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:49:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:11,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:49:11,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:49:11,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859290886] [2020-10-09 10:49:11,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:49:11,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:49:11,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:49:11,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=234, Unknown=1, NotChecked=0, Total=342 [2020-10-09 10:49:11,028 INFO L87 Difference]: Start difference. First operand 244 states and 598 transitions. Second operand 19 states. [2020-10-09 10:49:15,606 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-09 10:49:20,060 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-09 10:49:21,429 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-09 10:49:21,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:49:21,470 INFO L93 Difference]: Finished difference Result 384 states and 919 transitions. [2020-10-09 10:49:21,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 10:49:21,473 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:49:21,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:49:21,474 INFO L225 Difference]: With dead ends: 384 [2020-10-09 10:49:21,474 INFO L226 Difference]: Without dead ends: 375 [2020-10-09 10:49:21,475 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=408, Invalid=923, Unknown=1, NotChecked=0, Total=1332 [2020-10-09 10:49:21,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-10-09 10:49:21,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 241. [2020-10-09 10:49:21,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-09 10:49:21,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 594 transitions. [2020-10-09 10:49:21,478 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 594 transitions. Word has length 15 [2020-10-09 10:49:21,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:49:21,478 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 594 transitions. [2020-10-09 10:49:21,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:49:21,479 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 594 transitions. [2020-10-09 10:49:21,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:49:21,479 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:49:21,479 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:49:21,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2020-10-09 10:49:21,680 INFO L429 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:49:21,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:49:21,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1870450128, now seen corresponding path program 308 times [2020-10-09 10:49:21,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:49:21,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625677236] [2020-10-09 10:49:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:49:21,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:49:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:22,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625677236] [2020-10-09 10:49:22,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290929351] [2020-10-09 10:49:22,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:22,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:49:22,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:49:22,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:49:22,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:49:22,626 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:49:22,627 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:49:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:24,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:49:24,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-10-09 10:49:24,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702010932] [2020-10-09 10:49:24,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-09 10:49:24,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:49:24,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-09 10:49:24,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=269, Unknown=1, NotChecked=0, Total=380 [2020-10-09 10:49:24,804 INFO L87 Difference]: Start difference. First operand 241 states and 594 transitions. Second operand 20 states. [2020-10-09 10:49:25,656 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2020-10-09 10:49:28,116 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 46 [2020-10-09 10:49:36,455 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 53 [2020-10-09 10:49:51,279 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 62 DAG size of output: 60 Received shutdown request... [2020-10-09 10:49:59,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 10:49:59,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:59,641 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-09 10:49:59,646 WARN L235 ceAbstractionStarter]: Timeout [2020-10-09 10:49:59,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 10:49:59 BasicIcfg [2020-10-09 10:49:59,646 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 10:49:59,647 INFO L168 Benchmark]: Toolchain (without parser) took 876150.68 ms. Allocated memory was 249.0 MB in the beginning and 224.4 MB in the end (delta: -24.6 MB). Free memory was 204.2 MB in the beginning and 134.8 MB in the end (delta: 69.3 MB). Peak memory consumption was 44.7 MB. Max. memory is 14.2 GB. [2020-10-09 10:49:59,647 INFO L168 Benchmark]: CDTParser took 1.16 ms. Allocated memory is still 249.0 MB. Free memory is still 225.4 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 10:49:59,648 INFO L168 Benchmark]: CACSL2BoogieTranslator took 600.56 ms. Allocated memory was 249.0 MB in the beginning and 308.8 MB in the end (delta: 59.8 MB). Free memory was 204.2 MB in the beginning and 262.0 MB in the end (delta: -57.9 MB). Peak memory consumption was 27.1 MB. Max. memory is 14.2 GB. [2020-10-09 10:49:59,648 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.65 ms. Allocated memory is still 308.8 MB. Free memory was 262.0 MB in the beginning and 259.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 10:49:59,648 INFO L168 Benchmark]: Boogie Preprocessor took 60.19 ms. Allocated memory is still 308.8 MB. Free memory is still 259.5 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 10:49:59,648 INFO L168 Benchmark]: RCFGBuilder took 388.88 ms. Allocated memory is still 308.8 MB. Free memory was 259.5 MB in the beginning and 237.7 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-09 10:49:59,649 INFO L168 Benchmark]: TraceAbstraction took 875050.26 ms. Allocated memory was 308.8 MB in the beginning and 224.4 MB in the end (delta: -84.4 MB). Free memory was 237.7 MB in the beginning and 134.8 MB in the end (delta: 102.8 MB). Peak memory consumption was 18.4 MB. Max. memory is 14.2 GB. [2020-10-09 10:49:59,651 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.16 ms. Allocated memory is still 249.0 MB. Free memory is still 225.4 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 600.56 ms. Allocated memory was 249.0 MB in the beginning and 308.8 MB in the end (delta: 59.8 MB). Free memory was 204.2 MB in the beginning and 262.0 MB in the end (delta: -57.9 MB). Peak memory consumption was 27.1 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 45.65 ms. Allocated memory is still 308.8 MB. Free memory was 262.0 MB in the beginning and 259.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 60.19 ms. Allocated memory is still 308.8 MB. Free memory is still 259.5 MB. There was no memory consumed. Max. memory is 14.2 GB. * RCFGBuilder took 388.88 ms. Allocated memory is still 308.8 MB. Free memory was 259.5 MB in the beginning and 237.7 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 875050.26 ms. Allocated memory was 308.8 MB in the beginning and 224.4 MB in the end (delta: -84.4 MB). Free memory was 237.7 MB in the beginning and 134.8 MB in the end (delta: 102.8 MB). Peak memory consumption was 18.4 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 697 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 12 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 20 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.1s, 59 PlacesBefore, 20 PlacesAfterwards, 57 TransitionsBefore, 16 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 50 TotalNumberOfCompositions, 943 MoverChecksTotal - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was constructing difference of abstraction (241states) and FLOYD_HOARE automaton (currently 25 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (232 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 874.9s, OverallIterations: 337, TraceHistogramMax: 6, AutomataDifference: 532.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 4616 SDtfs, 36790 SDslu, 34441 SDs, 0 SdLazy, 25348 SolverSat, 11408 SolverUnsat, 41 SolverUnknown, 0 SolverNotchecked, 118.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10162 GetRequests, 1657 SyntacticMatches, 311 SemanticMatches, 8194 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 56936 ImplicationChecksByTransitivity, 640.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=282occurred in iteration=215, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 336 MinimizatonAttempts, 22656 StatesRemovedByMinimization, 335 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.8s SsaConstructionTime, 4.8s SatisfiabilityAnalysisTime, 255.7s InterpolantComputationTime, 8932 NumberOfCodeBlocks, 8930 NumberOfCodeBlocksAsserted, 1070 NumberOfCheckSat, 8266 ConstructedInterpolants, 65 QuantifiedInterpolants, 982755 SizeOfPredicates, 327 NumberOfNonLiveVariables, 30023 ConjunctsInSsa, 3484 ConjunctsInUnsatCore, 666 InterpolantComputations, 10 PerfectInterpolantSequences, 30/4226 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