/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/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-15 16:42:31,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 16:42:31,067 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 16:42:31,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 16:42:31,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 16:42:31,098 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 16:42:31,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 16:42:31,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 16:42:31,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 16:42:31,103 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 16:42:31,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 16:42:31,105 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 16:42:31,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 16:42:31,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 16:42:31,107 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 16:42:31,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 16:42:31,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 16:42:31,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 16:42:31,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 16:42:31,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 16:42:31,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 16:42:31,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 16:42:31,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 16:42:31,118 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 16:42:31,120 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 16:42:31,120 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 16:42:31,121 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 16:42:31,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 16:42:31,122 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 16:42:31,123 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 16:42:31,123 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 16:42:31,123 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 16:42:31,124 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 16:42:31,125 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 16:42:31,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 16:42:31,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 16:42:31,127 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 16:42:31,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 16:42:31,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 16:42:31,128 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 16:42:31,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 16:42:31,129 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 [2020-10-15 16:42:31,151 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 16:42:31,151 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 16:42:31,152 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 16:42:31,153 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 16:42:31,153 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 16:42:31,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 16:42:31,153 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 16:42:31,153 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 16:42:31,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 16:42:31,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 16:42:31,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 16:42:31,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 16:42:31,154 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 16:42:31,155 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 16:42:31,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 16:42:31,155 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 16:42:31,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 16:42:31,155 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 16:42:31,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 16:42:31,156 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 16:42:31,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 16:42:31,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 16:42:31,156 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 16:42:31,156 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 16:42:31,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 16:42:31,157 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 16:42:31,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 16:42:31,157 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 16:42:31,157 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 16:42:31,158 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-15 16:42:31,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 16:42:31,490 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 16:42:31,494 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 16:42:31,496 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 16:42:31,497 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 16:42:31,497 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-10-15 16:42:31,577 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9105fe234/07bec13e712a44c9a3f26303e85f543e/FLAGdf81430b9 [2020-10-15 16:42:32,119 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 16:42:32,121 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-10-15 16:42:32,140 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9105fe234/07bec13e712a44c9a3f26303e85f543e/FLAGdf81430b9 [2020-10-15 16:42:32,460 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9105fe234/07bec13e712a44c9a3f26303e85f543e [2020-10-15 16:42:32,469 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 16:42:32,471 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-15 16:42:32,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 16:42:32,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 16:42:32,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 16:42:32,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:42:32" (1/1) ... [2020-10-15 16:42:32,481 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b5d11e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:32, skipping insertion in model container [2020-10-15 16:42:32,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:42:32" (1/1) ... [2020-10-15 16:42:32,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 16:42:32,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 16:42:33,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 16:42:33,042 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 16:42:33,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 16:42:33,202 INFO L208 MainTranslator]: Completed translation [2020-10-15 16:42:33,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:33 WrapperNode [2020-10-15 16:42:33,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 16:42:33,206 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-15 16:42:33,206 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-15 16:42:33,206 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-15 16:42:33,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:33" (1/1) ... [2020-10-15 16:42:33,228 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:33" (1/1) ... [2020-10-15 16:42:33,251 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-15 16:42:33,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 16:42:33,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 16:42:33,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 16:42:33,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:33" (1/1) ... [2020-10-15 16:42:33,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:33" (1/1) ... [2020-10-15 16:42:33,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:33" (1/1) ... [2020-10-15 16:42:33,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:33" (1/1) ... [2020-10-15 16:42:33,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:33" (1/1) ... [2020-10-15 16:42:33,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:33" (1/1) ... [2020-10-15 16:42:33,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:33" (1/1) ... [2020-10-15 16:42:33,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 16:42:33,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 16:42:33,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 16:42:33,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 16:42:33,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:33" (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 [2020-10-15 16:42:33,343 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-15 16:42:33,343 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-15 16:42:33,343 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-15 16:42:33,343 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-15 16:42:33,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 16:42:33,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-15 16:42:33,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 16:42:33,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 16:42:33,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-15 16:42:33,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 16:42:33,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 16:42:33,346 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-15 16:42:33,640 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 16:42:33,640 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-15 16:42:33,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:42:33 BoogieIcfgContainer [2020-10-15 16:42:33,643 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 16:42:33,644 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 16:42:33,645 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 16:42:33,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 16:42:33,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 04:42:32" (1/3) ... [2020-10-15 16:42:33,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c1b804e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:42:33, skipping insertion in model container [2020-10-15 16:42:33,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:33" (2/3) ... [2020-10-15 16:42:33,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c1b804e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:42:33, skipping insertion in model container [2020-10-15 16:42:33,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:42:33" (3/3) ... [2020-10-15 16:42:33,652 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2020-10-15 16:42:33,663 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-15 16:42:33,664 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-15 16:42:33,671 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 16:42:33,672 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-15 16:42:33,705 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,705 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,705 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,715 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,716 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,716 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,716 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,717 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,717 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,717 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,718 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,718 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,718 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,718 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,719 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,719 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,719 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,719 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,720 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,720 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,720 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,721 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,721 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,721 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,722 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,722 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,722 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,722 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,726 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,726 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,727 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,727 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,727 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,727 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,733 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,733 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,733 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,734 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,734 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,734 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:33,749 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-15 16:42:33,767 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 16:42:33,768 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 16:42:33,768 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 16:42:33,768 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 16:42:33,768 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 16:42:33,768 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 16:42:33,769 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 16:42:33,769 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 16:42:33,779 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 16:42:33,781 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-15 16:42:33,783 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-15 16:42:33,785 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-15 16:42:33,821 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-15 16:42:33,822 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-15 16:42:33,827 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-15 16:42:33,830 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-15 16:42:35,111 INFO L132 LiptonReduction]: Checked pairs total: 911 [2020-10-15 16:42:35,111 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-15 16:42:35,118 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-15 16:42:35,130 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-15 16:42:35,133 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-15 16:42:35,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-15 16:42:35,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:35,141 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-15 16:42:35,141 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:35,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:35,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-15 16:42:35,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:35,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340563296] [2020-10-15 16:42:35,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:35,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:35,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340563296] [2020-10-15 16:42:35,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:42:35,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 16:42:35,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808537133] [2020-10-15 16:42:35,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 16:42:35,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:35,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 16:42:35,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 16:42:35,395 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-15 16:42:35,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:35,468 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-15 16:42:35,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 16:42:35,470 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-15 16:42:35,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:35,482 INFO L225 Difference]: With dead ends: 75 [2020-10-15 16:42:35,482 INFO L226 Difference]: Without dead ends: 42 [2020-10-15 16:42:35,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:42:35,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-15 16:42:35,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-15 16:42:35,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 16:42:35,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-15 16:42:35,525 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-15 16:42:35,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:35,526 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-15 16:42:35,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 16:42:35,526 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-15 16:42:35,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 16:42:35,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:35,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:35,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 16:42:35,528 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:35,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:35,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-15 16:42:35,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:35,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989302244] [2020-10-15 16:42:35,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:35,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989302244] [2020-10-15 16:42:35,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:42:35,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 16:42:35,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069390755] [2020-10-15 16:42:35,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 16:42:35,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:35,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 16:42:35,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:42:35,655 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-15 16:42:35,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:35,684 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-15 16:42:35,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 16:42:35,685 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 16:42:35,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:35,686 INFO L225 Difference]: With dead ends: 56 [2020-10-15 16:42:35,687 INFO L226 Difference]: Without dead ends: 50 [2020-10-15 16:42:35,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:42:35,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-15 16:42:35,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-15 16:42:35,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 16:42:35,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-15 16:42:35,695 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-15 16:42:35,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:35,696 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-15 16:42:35,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 16:42:35,697 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-15 16:42:35,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:42:35,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:35,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:35,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 16:42:35,698 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:35,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:35,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-15 16:42:35,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:35,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344982175] [2020-10-15 16:42:35,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:35,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344982175] [2020-10-15 16:42:35,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:42:35,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:42:35,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833686323] [2020-10-15 16:42:35,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:42:35,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:35,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:42:35,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:42:35,771 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-15 16:42:35,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:35,844 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-15 16:42:35,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:42:35,845 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:42:35,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:35,847 INFO L225 Difference]: With dead ends: 78 [2020-10-15 16:42:35,847 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 16:42:35,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:35,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 16:42:35,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-15 16:42:35,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 16:42:35,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-15 16:42:35,857 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-15 16:42:35,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:35,857 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-15 16:42:35,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:42:35,857 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-15 16:42:35,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:42:35,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:35,859 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:35,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 16:42:35,859 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:35,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:35,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-15 16:42:35,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:35,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081753951] [2020-10-15 16:42:35,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:35,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:35,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081753951] [2020-10-15 16:42:35,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:42:35,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:42:35,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608419405] [2020-10-15 16:42:35,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:42:35,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:35,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:42:35,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:42:35,923 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-15 16:42:35,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:35,994 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-15 16:42:35,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:42:35,995 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:42:35,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:35,996 INFO L225 Difference]: With dead ends: 54 [2020-10-15 16:42:35,996 INFO L226 Difference]: Without dead ends: 43 [2020-10-15 16:42:35,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:35,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-15 16:42:36,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-15 16:42:36,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-15 16:42:36,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-15 16:42:36,002 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-15 16:42:36,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:36,002 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-15 16:42:36,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:42:36,003 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-15 16:42:36,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:42:36,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:36,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:36,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 16:42:36,004 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:36,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:36,005 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-15 16:42:36,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:36,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225235025] [2020-10-15 16:42:36,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:36,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225235025] [2020-10-15 16:42:36,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:42:36,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:42:36,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150548161] [2020-10-15 16:42:36,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:42:36,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:36,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:42:36,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:42:36,088 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-15 16:42:36,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:36,152 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-15 16:42:36,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:42:36,153 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:42:36,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:36,154 INFO L225 Difference]: With dead ends: 57 [2020-10-15 16:42:36,154 INFO L226 Difference]: Without dead ends: 51 [2020-10-15 16:42:36,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:36,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-15 16:42:36,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-15 16:42:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-15 16:42:36,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-15 16:42:36,159 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-15 16:42:36,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:36,159 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-15 16:42:36,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:42:36,160 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-15 16:42:36,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:42:36,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:36,161 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:36,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 16:42:36,161 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:36,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:36,162 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-15 16:42:36,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:36,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183051887] [2020-10-15 16:42:36,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:36,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:36,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183051887] [2020-10-15 16:42:36,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868489992] [2020-10-15 16:42:36,218 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 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 [2020-10-15 16:42:36,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:36,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:36,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:42:36,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:36,326 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:36,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:36,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:36,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 16:42:36,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556611930] [2020-10-15 16:42:36,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 16:42:36,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:36,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 16:42:36,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-15 16:42:36,341 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-15 16:42:36,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:36,433 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-15 16:42:36,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:42:36,434 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-15 16:42:36,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:36,434 INFO L225 Difference]: With dead ends: 48 [2020-10-15 16:42:36,435 INFO L226 Difference]: Without dead ends: 43 [2020-10-15 16:42:36,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:36,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-15 16:42:36,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-15 16:42:36,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-15 16:42:36,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-15 16:42:36,439 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-15 16:42:36,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:36,440 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-15 16:42:36,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 16:42:36,440 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-15 16:42:36,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:42:36,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:36,441 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:36,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-15 16:42:36,654 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:36,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:36,655 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-15 16:42:36,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:36,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807582612] [2020-10-15 16:42:36,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:36,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807582612] [2020-10-15 16:42:36,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284012180] [2020-10-15 16:42:36,714 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 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 [2020-10-15 16:42:36,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:36,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:36,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:42:36,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:36,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:36,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:36,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-15 16:42:36,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989339572] [2020-10-15 16:42:36,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 16:42:36,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:36,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 16:42:36,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-15 16:42:36,792 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-15 16:42:36,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:36,859 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-15 16:42:36,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:42:36,860 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-15 16:42:36,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:36,860 INFO L225 Difference]: With dead ends: 54 [2020-10-15 16:42:36,861 INFO L226 Difference]: Without dead ends: 48 [2020-10-15 16:42:36,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:36,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-15 16:42:36,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-15 16:42:36,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 16:42:36,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-15 16:42:36,866 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-15 16:42:36,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:36,866 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-15 16:42:36,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 16:42:36,867 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-15 16:42:36,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:42:36,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:36,868 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:37,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:37,080 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:37,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:37,081 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-15 16:42:37,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:37,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732897485] [2020-10-15 16:42:37,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:37,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732897485] [2020-10-15 16:42:37,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308796462] [2020-10-15 16:42:37,158 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 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 [2020-10-15 16:42:37,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:42:37,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:37,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:42:37,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:37,233 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:37,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:37,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:37,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 16:42:37,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453896619] [2020-10-15 16:42:37,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 16:42:37,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:37,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 16:42:37,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-15 16:42:37,249 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-15 16:42:37,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:37,346 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-15 16:42:37,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:42:37,346 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-15 16:42:37,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:37,347 INFO L225 Difference]: With dead ends: 58 [2020-10-15 16:42:37,348 INFO L226 Difference]: Without dead ends: 52 [2020-10-15 16:42:37,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:37,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-15 16:42:37,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-15 16:42:37,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-15 16:42:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-15 16:42:37,353 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-15 16:42:37,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:37,353 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-15 16:42:37,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 16:42:37,353 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-15 16:42:37,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:42:37,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:37,354 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:37,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:37,566 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:37,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:37,567 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-15 16:42:37,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:37,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968916982] [2020-10-15 16:42:37,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:37,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:37,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968916982] [2020-10-15 16:42:37,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597984655] [2020-10-15 16:42:37,617 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 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 [2020-10-15 16:42:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:37,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:42:37,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:37,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:37,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-15 16:42:37,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770278508] [2020-10-15 16:42:37,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 16:42:37,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:37,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 16:42:37,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-15 16:42:37,713 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-15 16:42:37,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:37,852 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-15 16:42:37,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:42:37,853 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-15 16:42:37,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:37,854 INFO L225 Difference]: With dead ends: 78 [2020-10-15 16:42:37,854 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 16:42:37,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:37,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 16:42:37,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-15 16:42:37,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 16:42:37,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-15 16:42:37,859 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-15 16:42:37,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:37,859 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-15 16:42:37,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 16:42:37,860 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-15 16:42:37,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:42:37,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:37,860 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:38,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:38,073 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:38,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:38,073 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-15 16:42:38,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:38,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782858562] [2020-10-15 16:42:38,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:38,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:38,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782858562] [2020-10-15 16:42:38,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098865650] [2020-10-15 16:42:38,121 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 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 [2020-10-15 16:42:38,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:38,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:38,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:42:38,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:38,226 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:38,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:38,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 16:42:38,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709987874] [2020-10-15 16:42:38,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 16:42:38,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:38,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 16:42:38,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-15 16:42:38,241 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-15 16:42:38,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:38,402 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-15 16:42:38,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:42:38,403 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-15 16:42:38,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:38,403 INFO L225 Difference]: With dead ends: 62 [2020-10-15 16:42:38,404 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 16:42:38,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:42:38,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 16:42:38,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-15 16:42:38,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-15 16:42:38,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-15 16:42:38,408 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-15 16:42:38,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:38,408 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-15 16:42:38,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 16:42:38,408 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-15 16:42:38,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:42:38,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:38,409 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:38,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-15 16:42:38,618 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:38,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:38,619 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-15 16:42:38,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:38,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571849251] [2020-10-15 16:42:38,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:38,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571849251] [2020-10-15 16:42:38,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576361414] [2020-10-15 16:42:38,677 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 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 [2020-10-15 16:42:38,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:42:38,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:38,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:42:38,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:38,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:38,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-15 16:42:38,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078586002] [2020-10-15 16:42:38,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 16:42:38,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:38,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 16:42:38,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-15 16:42:38,737 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-15 16:42:38,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:38,841 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-15 16:42:38,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:42:38,841 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-15 16:42:38,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:38,842 INFO L225 Difference]: With dead ends: 64 [2020-10-15 16:42:38,842 INFO L226 Difference]: Without dead ends: 58 [2020-10-15 16:42:38,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:38,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-15 16:42:38,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-15 16:42:38,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-15 16:42:38,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-15 16:42:38,849 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-15 16:42:38,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:38,849 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-15 16:42:38,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 16:42:38,849 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-15 16:42:38,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:42:38,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:38,854 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:39,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:39,065 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:39,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:39,066 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-15 16:42:39,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:39,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761688346] [2020-10-15 16:42:39,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:39,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761688346] [2020-10-15 16:42:39,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41068142] [2020-10-15 16:42:39,123 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 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 [2020-10-15 16:42:39,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:39,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:39,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:42:39,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:39,194 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:39,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:39,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 16:42:39,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776808047] [2020-10-15 16:42:39,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:42:39,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:39,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:42:39,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:39,210 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-15 16:42:39,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:39,372 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-15 16:42:39,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:42:39,373 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 16:42:39,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:39,374 INFO L225 Difference]: With dead ends: 61 [2020-10-15 16:42:39,374 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 16:42:39,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:42:39,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 16:42:39,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-15 16:42:39,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-15 16:42:39,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-15 16:42:39,383 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-15 16:42:39,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:39,383 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-15 16:42:39,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:42:39,383 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-15 16:42:39,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:42:39,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:39,384 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:39,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:39,596 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:39,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:39,598 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-15 16:42:39,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:39,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927999073] [2020-10-15 16:42:39,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:39,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927999073] [2020-10-15 16:42:39,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330924827] [2020-10-15 16:42:39,666 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 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 [2020-10-15 16:42:39,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:39,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:39,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:42:39,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:39,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:39,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-15 16:42:39,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170601561] [2020-10-15 16:42:39,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 16:42:39,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:39,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 16:42:39,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-15 16:42:39,748 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-15 16:42:39,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:39,894 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-15 16:42:39,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:42:39,895 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-15 16:42:39,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:39,896 INFO L225 Difference]: With dead ends: 77 [2020-10-15 16:42:39,896 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 16:42:39,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:42:39,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 16:42:39,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-15 16:42:39,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-15 16:42:39,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-15 16:42:39,901 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-15 16:42:39,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:39,901 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-15 16:42:39,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 16:42:39,902 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-15 16:42:39,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:42:39,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:39,902 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:40,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-15 16:42:40,114 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:40,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:40,115 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-15 16:42:40,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:40,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455749539] [2020-10-15 16:42:40,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:40,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455749539] [2020-10-15 16:42:40,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015032149] [2020-10-15 16:42:40,172 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 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 [2020-10-15 16:42:40,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:42:40,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:40,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:42:40,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:40,248 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:40,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:40,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 16:42:40,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907589512] [2020-10-15 16:42:40,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:42:40,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:40,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:42:40,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:40,259 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-15 16:42:40,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:40,479 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-10-15 16:42:40,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:42:40,480 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 16:42:40,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:40,481 INFO L225 Difference]: With dead ends: 58 [2020-10-15 16:42:40,481 INFO L226 Difference]: Without dead ends: 50 [2020-10-15 16:42:40,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:42:40,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-15 16:42:40,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-10-15 16:42:40,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-15 16:42:40,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-15 16:42:40,484 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-15 16:42:40,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:40,485 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-15 16:42:40,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:42:40,485 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-15 16:42:40,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:42:40,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:40,487 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:40,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:40,695 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:40,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:40,696 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-15 16:42:40,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:40,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285429755] [2020-10-15 16:42:40,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:40,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:40,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285429755] [2020-10-15 16:42:40,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781290142] [2020-10-15 16:42:40,764 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 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 [2020-10-15 16:42:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:40,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:42:40,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:40,840 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:40,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:40,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 16:42:40,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949831502] [2020-10-15 16:42:40,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:42:40,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:40,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:42:40,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:40,866 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-15 16:42:41,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:41,033 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-15 16:42:41,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:42:41,034 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 16:42:41,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:41,035 INFO L225 Difference]: With dead ends: 60 [2020-10-15 16:42:41,035 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 16:42:41,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:42:41,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 16:42:41,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-15 16:42:41,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 16:42:41,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-15 16:42:41,039 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-15 16:42:41,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:41,039 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-15 16:42:41,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:42:41,040 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-15 16:42:41,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:41,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:41,040 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:41,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-15 16:42:41,243 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:41,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:41,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-10-15 16:42:41,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:41,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323461968] [2020-10-15 16:42:41,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:41,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:41,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323461968] [2020-10-15 16:42:41,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111831318] [2020-10-15 16:42:41,304 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 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 [2020-10-15 16:42:41,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:41,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:41,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:42:41,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:41,389 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:41,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:41,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:41,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 16:42:41,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655258481] [2020-10-15 16:42:41,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:41,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:41,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:41,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:41,407 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-15 16:42:41,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:41,596 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-15 16:42:41,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:42:41,597 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 16:42:41,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:41,597 INFO L225 Difference]: With dead ends: 54 [2020-10-15 16:42:41,598 INFO L226 Difference]: Without dead ends: 49 [2020-10-15 16:42:41,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:42:41,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-15 16:42:41,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-15 16:42:41,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-15 16:42:41,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-15 16:42:41,601 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-15 16:42:41,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:41,602 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-15 16:42:41,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:41,602 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-15 16:42:41,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:41,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:41,603 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:41,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-15 16:42:41,814 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:41,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:41,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-15 16:42:41,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:41,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124684219] [2020-10-15 16:42:41,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:41,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124684219] [2020-10-15 16:42:41,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558026107] [2020-10-15 16:42:41,879 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 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 [2020-10-15 16:42:41,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:42:41,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:41,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:42:41,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:41,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:41,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-15 16:42:41,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641778693] [2020-10-15 16:42:41,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:42:41,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:41,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:42:41,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:41,962 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-15 16:42:42,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:42,059 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-15 16:42:42,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:42:42,060 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 16:42:42,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:42,061 INFO L225 Difference]: With dead ends: 60 [2020-10-15 16:42:42,061 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 16:42:42,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:42:42,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 16:42:42,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-15 16:42:42,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 16:42:42,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-15 16:42:42,065 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-15 16:42:42,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:42,066 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-15 16:42:42,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:42:42,066 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-15 16:42:42,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:42,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:42,066 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:42,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-15 16:42:42,277 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:42,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:42,278 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-15 16:42:42,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:42,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912353938] [2020-10-15 16:42:42,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:42,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912353938] [2020-10-15 16:42:42,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589615927] [2020-10-15 16:42:42,342 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 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 [2020-10-15 16:42:42,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:42,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:42,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:42:42,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:42,412 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:42,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:42,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:42,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 16:42:42,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547371061] [2020-10-15 16:42:42,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:42,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:42,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:42,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:42,425 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-15 16:42:42,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:42,577 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-15 16:42:42,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:42:42,577 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 16:42:42,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:42,578 INFO L225 Difference]: With dead ends: 66 [2020-10-15 16:42:42,578 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 16:42:42,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:42:42,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 16:42:42,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-15 16:42:42,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-15 16:42:42,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-15 16:42:42,581 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-15 16:42:42,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:42,581 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-15 16:42:42,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:42,582 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-15 16:42:42,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:42,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:42,582 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:42,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-15 16:42:42,792 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:42,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:42,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-15 16:42:42,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:42,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693802817] [2020-10-15 16:42:42,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:42,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:42,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693802817] [2020-10-15 16:42:42,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851030251] [2020-10-15 16:42:42,852 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 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 [2020-10-15 16:42:42,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:42:42,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:42,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:42:42,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:42,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:42,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-15 16:42:42,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125308707] [2020-10-15 16:42:42,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:42:42,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:42,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:42:42,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:42,911 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-15 16:42:43,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:43,068 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-15 16:42:43,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:42:43,069 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 16:42:43,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:43,069 INFO L225 Difference]: With dead ends: 67 [2020-10-15 16:42:43,070 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 16:42:43,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:42:43,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 16:42:43,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-15 16:42:43,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-15 16:42:43,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-15 16:42:43,074 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-15 16:42:43,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:43,074 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-15 16:42:43,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:42:43,075 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-15 16:42:43,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:43,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:43,075 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:43,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:43,283 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:43,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:43,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-15 16:42:43,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:43,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513236504] [2020-10-15 16:42:43,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:43,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:43,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513236504] [2020-10-15 16:42:43,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178347996] [2020-10-15 16:42:43,349 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 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 [2020-10-15 16:42:43,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:42:43,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:43,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:42:43,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:43,421 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:43,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:43,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:43,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 16:42:43,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77962097] [2020-10-15 16:42:43,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:43,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:43,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:43,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:43,433 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-15 16:42:43,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:43,626 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-15 16:42:43,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:42:43,627 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 16:42:43,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:43,627 INFO L225 Difference]: With dead ends: 69 [2020-10-15 16:42:43,628 INFO L226 Difference]: Without dead ends: 63 [2020-10-15 16:42:43,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:42:43,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-15 16:42:43,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-15 16:42:43,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 16:42:43,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-15 16:42:43,631 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-15 16:42:43,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:43,631 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-15 16:42:43,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:43,631 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-15 16:42:43,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:43,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:43,632 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:43,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:43,842 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:43,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:43,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-15 16:42:43,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:43,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352371115] [2020-10-15 16:42:43,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:43,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352371115] [2020-10-15 16:42:43,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423172205] [2020-10-15 16:42:43,901 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 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 [2020-10-15 16:42:43,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:43,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:42:43,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:43,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:43,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:43,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-15 16:42:43,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035289554] [2020-10-15 16:42:43,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:42:43,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:43,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:42:43,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:43,962 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-15 16:42:44,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:44,149 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-15 16:42:44,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:42:44,153 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 16:42:44,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:44,154 INFO L225 Difference]: With dead ends: 88 [2020-10-15 16:42:44,154 INFO L226 Difference]: Without dead ends: 82 [2020-10-15 16:42:44,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:42:44,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-15 16:42:44,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-15 16:42:44,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 16:42:44,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-15 16:42:44,158 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-15 16:42:44,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:44,159 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-15 16:42:44,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:42:44,159 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-15 16:42:44,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:44,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:44,160 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:44,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:44,372 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:44,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:44,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-15 16:42:44,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:44,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745789494] [2020-10-15 16:42:44,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:44,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:44,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:44,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745789494] [2020-10-15 16:42:44,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22950264] [2020-10-15 16:42:44,425 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 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 [2020-10-15 16:42:44,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:44,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:44,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:42:44,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:44,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:44,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 16:42:44,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947888960] [2020-10-15 16:42:44,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:44,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:44,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:44,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:44,503 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-15 16:42:44,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:44,780 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-15 16:42:44,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:42:44,781 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 16:42:44,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:44,782 INFO L225 Difference]: With dead ends: 69 [2020-10-15 16:42:44,782 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 16:42:44,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:42:44,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 16:42:44,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-15 16:42:44,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-15 16:42:44,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-15 16:42:44,786 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-15 16:42:44,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:44,786 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-15 16:42:44,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:44,786 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-15 16:42:44,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:44,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:44,787 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:44,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-15 16:42:44,999 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:44,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:44,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-15 16:42:45,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:45,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257564831] [2020-10-15 16:42:45,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:45,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257564831] [2020-10-15 16:42:45,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725456829] [2020-10-15 16:42:45,098 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 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 [2020-10-15 16:42:45,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:42:45,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:45,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:42:45,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:45,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:45,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-15 16:42:45,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544637748] [2020-10-15 16:42:45,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:45,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:45,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:45,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:45,175 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-15 16:42:45,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:45,294 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-15 16:42:45,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:42:45,295 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-15 16:42:45,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:45,295 INFO L225 Difference]: With dead ends: 74 [2020-10-15 16:42:45,296 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 16:42:45,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:42:45,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 16:42:45,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-15 16:42:45,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 16:42:45,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-15 16:42:45,299 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-15 16:42:45,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:45,299 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-15 16:42:45,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:45,299 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-15 16:42:45,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:45,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:45,300 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:45,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-15 16:42:45,508 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:45,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:45,508 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-15 16:42:45,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:45,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693422787] [2020-10-15 16:42:45,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:45,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:45,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693422787] [2020-10-15 16:42:45,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866634128] [2020-10-15 16:42:45,587 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 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 [2020-10-15 16:42:45,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:45,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:45,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:42:45,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:45,654 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:45,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:45,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:45,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 16:42:45,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449530484] [2020-10-15 16:42:45,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:45,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:45,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:45,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:45,668 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-15 16:42:45,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:45,862 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-15 16:42:45,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:42:45,863 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 16:42:45,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:45,864 INFO L225 Difference]: With dead ends: 71 [2020-10-15 16:42:45,864 INFO L226 Difference]: Without dead ends: 65 [2020-10-15 16:42:45,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:42:45,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-15 16:42:45,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-15 16:42:45,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 16:42:45,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-15 16:42:45,868 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-15 16:42:45,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:45,868 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-15 16:42:45,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:45,868 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-15 16:42:45,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:45,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:45,869 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:46,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-15 16:42:46,072 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:46,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:46,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-15 16:42:46,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:46,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217853561] [2020-10-15 16:42:46,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:46,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217853561] [2020-10-15 16:42:46,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240351279] [2020-10-15 16:42:46,155 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 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 [2020-10-15 16:42:46,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:42:46,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:46,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:42:46,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:46,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:46,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:46,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-15 16:42:46,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997518945] [2020-10-15 16:42:46,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:46,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:46,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:46,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:46,212 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-15 16:42:46,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:46,384 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-15 16:42:46,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:42:46,384 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-15 16:42:46,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:46,385 INFO L225 Difference]: With dead ends: 68 [2020-10-15 16:42:46,385 INFO L226 Difference]: Without dead ends: 62 [2020-10-15 16:42:46,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:42:46,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-15 16:42:46,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-15 16:42:46,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 16:42:46,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-15 16:42:46,389 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-15 16:42:46,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:46,390 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-15 16:42:46,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:46,390 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-15 16:42:46,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:46,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:46,390 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:46,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-15 16:42:46,601 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:46,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:46,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-15 16:42:46,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:46,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772128126] [2020-10-15 16:42:46,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:46,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772128126] [2020-10-15 16:42:46,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064290773] [2020-10-15 16:42:46,689 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 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 [2020-10-15 16:42:46,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:42:46,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:46,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:42:46,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:46,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:46,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:46,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:46,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 16:42:46,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359961924] [2020-10-15 16:42:46,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:46,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:46,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:46,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:46,774 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-15 16:42:47,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:47,048 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-15 16:42:47,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:42:47,048 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 16:42:47,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:47,049 INFO L225 Difference]: With dead ends: 67 [2020-10-15 16:42:47,049 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 16:42:47,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:42:47,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 16:42:47,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-15 16:42:47,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 16:42:47,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-15 16:42:47,052 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-15 16:42:47,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:47,052 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-15 16:42:47,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:47,052 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-15 16:42:47,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:47,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:47,053 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:47,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-15 16:42:47,262 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:47,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:47,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-15 16:42:47,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:47,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519528231] [2020-10-15 16:42:47,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:47,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519528231] [2020-10-15 16:42:47,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393565186] [2020-10-15 16:42:47,320 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 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 [2020-10-15 16:42:47,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:47,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:42:47,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:47,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:47,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-15 16:42:47,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22154147] [2020-10-15 16:42:47,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:47,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:47,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:47,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:47,378 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-15 16:42:47,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:47,576 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-15 16:42:47,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:42:47,576 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-15 16:42:47,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:47,577 INFO L225 Difference]: With dead ends: 83 [2020-10-15 16:42:47,577 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 16:42:47,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:42:47,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 16:42:47,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-15 16:42:47,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 16:42:47,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-15 16:42:47,580 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-15 16:42:47,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:47,580 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-15 16:42:47,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:47,581 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-15 16:42:47,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:47,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:47,581 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:47,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:47,790 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:47,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:47,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-15 16:42:47,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:47,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336568570] [2020-10-15 16:42:47,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:47,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336568570] [2020-10-15 16:42:47,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391589603] [2020-10-15 16:42:47,849 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 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 [2020-10-15 16:42:47,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:47,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:47,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:42:47,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:47,916 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:47,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:47,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 16:42:47,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252042240] [2020-10-15 16:42:47,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:47,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:47,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:47,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:47,927 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-15 16:42:48,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:48,221 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-10-15 16:42:48,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:42:48,221 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 16:42:48,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:48,222 INFO L225 Difference]: With dead ends: 64 [2020-10-15 16:42:48,222 INFO L226 Difference]: Without dead ends: 56 [2020-10-15 16:42:48,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:42:48,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-15 16:42:48,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2020-10-15 16:42:48,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-15 16:42:48,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-15 16:42:48,226 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-15 16:42:48,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:48,226 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-15 16:42:48,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:48,227 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-15 16:42:48,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:48,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:48,227 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:48,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-15 16:42:48,436 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:48,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:48,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-15 16:42:48,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:48,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964729749] [2020-10-15 16:42:48,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:48,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964729749] [2020-10-15 16:42:48,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221357863] [2020-10-15 16:42:48,493 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 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 [2020-10-15 16:42:48,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:42:48,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:48,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:42:48,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:48,552 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:48,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:48,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:48,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 16:42:48,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479313126] [2020-10-15 16:42:48,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:48,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:48,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:48,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:48,569 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-15 16:42:48,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:48,834 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-15 16:42:48,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:42:48,834 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 16:42:48,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:48,835 INFO L225 Difference]: With dead ends: 68 [2020-10-15 16:42:48,835 INFO L226 Difference]: Without dead ends: 63 [2020-10-15 16:42:48,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:42:48,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-15 16:42:48,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-15 16:42:48,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 16:42:48,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-15 16:42:48,839 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-15 16:42:48,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:48,839 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-15 16:42:48,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:48,839 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-15 16:42:48,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:48,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:48,840 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:49,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-15 16:42:49,048 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:49,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:49,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-15 16:42:49,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:49,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597913172] [2020-10-15 16:42:49,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:49,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:49,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597913172] [2020-10-15 16:42:49,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905932437] [2020-10-15 16:42:49,116 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 [2020-10-15 16:42:49,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:49,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:49,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:49,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:49,174 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:49,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:49,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:49,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 16:42:49,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508413467] [2020-10-15 16:42:49,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:49,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:49,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:49,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:49,188 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-15 16:42:49,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:49,472 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-15 16:42:49,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:42:49,473 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 16:42:49,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:49,475 INFO L225 Difference]: With dead ends: 60 [2020-10-15 16:42:49,475 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 16:42:49,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:42:49,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 16:42:49,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-15 16:42:49,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 16:42:49,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-15 16:42:49,478 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-15 16:42:49,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:49,478 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-15 16:42:49,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:49,478 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-15 16:42:49,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:49,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:49,479 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:49,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:49,689 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:49,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:49,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-15 16:42:49,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:49,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835841272] [2020-10-15 16:42:49,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:49,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835841272] [2020-10-15 16:42:49,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059176572] [2020-10-15 16:42:49,774 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 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 [2020-10-15 16:42:49,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 16:42:49,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:49,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:49,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:49,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:49,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:49,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 16:42:49,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646730439] [2020-10-15 16:42:49,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:49,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:49,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:49,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:49,850 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-15 16:42:49,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:49,998 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-15 16:42:49,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:42:49,998 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 16:42:49,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:49,999 INFO L225 Difference]: With dead ends: 66 [2020-10-15 16:42:49,999 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 16:42:50,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:42:50,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 16:42:50,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-15 16:42:50,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 16:42:50,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-15 16:42:50,002 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-15 16:42:50,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:50,003 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-15 16:42:50,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:50,003 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-15 16:42:50,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:50,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:50,003 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:50,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:50,211 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:50,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:50,211 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-15 16:42:50,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:50,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106614818] [2020-10-15 16:42:50,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:50,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:50,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106614818] [2020-10-15 16:42:50,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742434909] [2020-10-15 16:42:50,297 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 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 [2020-10-15 16:42:50,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:42:50,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:50,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:50,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:50,352 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:50,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:50,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:50,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 16:42:50,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443900677] [2020-10-15 16:42:50,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:50,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:50,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:50,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:50,365 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-15 16:42:50,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:50,547 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-15 16:42:50,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:42:50,547 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 16:42:50,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:50,549 INFO L225 Difference]: With dead ends: 74 [2020-10-15 16:42:50,549 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 16:42:50,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:42:50,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 16:42:50,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-15 16:42:50,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-15 16:42:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-15 16:42:50,552 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-15 16:42:50,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:50,552 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-15 16:42:50,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:50,552 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-15 16:42:50,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:50,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:50,553 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:50,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-15 16:42:50,757 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:50,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:50,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-15 16:42:50,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:50,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663458266] [2020-10-15 16:42:50,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:50,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663458266] [2020-10-15 16:42:50,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999845613] [2020-10-15 16:42:50,834 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 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 [2020-10-15 16:42:50,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:50,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:50,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:50,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:50,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:50,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 16:42:50,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145446068] [2020-10-15 16:42:50,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:50,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:50,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:50,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:50,888 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-15 16:42:51,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:51,094 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-15 16:42:51,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:42:51,094 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 16:42:51,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:51,095 INFO L225 Difference]: With dead ends: 75 [2020-10-15 16:42:51,095 INFO L226 Difference]: Without dead ends: 69 [2020-10-15 16:42:51,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:42:51,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-15 16:42:51,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-15 16:42:51,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 16:42:51,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-15 16:42:51,098 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-15 16:42:51,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:51,099 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-15 16:42:51,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:51,099 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-15 16:42:51,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:51,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:51,099 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:51,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:51,300 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:51,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:51,301 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-15 16:42:51,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:51,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850776669] [2020-10-15 16:42:51,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:51,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850776669] [2020-10-15 16:42:51,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100623943] [2020-10-15 16:42:51,381 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 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 [2020-10-15 16:42:51,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:51,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:51,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:51,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:51,448 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:51,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:51,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 16:42:51,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709339686] [2020-10-15 16:42:51,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:51,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:51,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:51,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:51,459 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-15 16:42:51,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:51,704 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-15 16:42:51,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:42:51,705 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 16:42:51,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:51,706 INFO L225 Difference]: With dead ends: 79 [2020-10-15 16:42:51,706 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 16:42:51,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:42:51,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 16:42:51,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-15 16:42:51,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 16:42:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-15 16:42:51,709 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-15 16:42:51,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:51,709 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-15 16:42:51,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:51,709 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-15 16:42:51,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:51,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:51,710 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:51,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-15 16:42:51,919 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:51,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:51,920 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-15 16:42:51,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:51,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113917246] [2020-10-15 16:42:51,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:52,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113917246] [2020-10-15 16:42:52,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893063922] [2020-10-15 16:42:52,011 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 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 [2020-10-15 16:42:52,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:42:52,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:52,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:52,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:52,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:52,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 16:42:52,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765644933] [2020-10-15 16:42:52,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:52,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:52,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:52,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:52,095 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-15 16:42:52,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:52,356 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-15 16:42:52,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:42:52,357 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 16:42:52,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:52,358 INFO L225 Difference]: With dead ends: 79 [2020-10-15 16:42:52,358 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 16:42:52,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:42:52,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 16:42:52,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-15 16:42:52,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-15 16:42:52,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-15 16:42:52,361 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-15 16:42:52,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:52,361 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-15 16:42:52,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:52,362 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-15 16:42:52,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:52,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:52,362 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:52,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:52,573 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:52,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:52,573 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-15 16:42:52,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:52,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405227987] [2020-10-15 16:42:52,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:52,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405227987] [2020-10-15 16:42:52,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454801922] [2020-10-15 16:42:52,666 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 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 [2020-10-15 16:42:52,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:52,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:52,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:52,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:52,721 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:52,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:52,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 16:42:52,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601068140] [2020-10-15 16:42:52,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:52,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:52,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:52,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:52,732 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-15 16:42:53,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:53,011 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-15 16:42:53,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:42:53,012 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 16:42:53,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:53,012 INFO L225 Difference]: With dead ends: 76 [2020-10-15 16:42:53,012 INFO L226 Difference]: Without dead ends: 70 [2020-10-15 16:42:53,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:42:53,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-15 16:42:53,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-15 16:42:53,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 16:42:53,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-15 16:42:53,015 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-15 16:42:53,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:53,015 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-15 16:42:53,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:53,015 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-15 16:42:53,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:53,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:53,015 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:53,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-15 16:42:53,216 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:53,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:53,217 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-15 16:42:53,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:53,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28284290] [2020-10-15 16:42:53,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:53,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:53,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28284290] [2020-10-15 16:42:53,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134349200] [2020-10-15 16:42:53,277 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 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 [2020-10-15 16:42:53,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 16:42:53,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:53,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:53,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:53,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:53,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 16:42:53,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852365082] [2020-10-15 16:42:53,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:53,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:53,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:53,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:53,347 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-15 16:42:53,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:53,602 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-15 16:42:53,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:42:53,603 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 16:42:53,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:53,604 INFO L225 Difference]: With dead ends: 96 [2020-10-15 16:42:53,604 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 16:42:53,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:42:53,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 16:42:53,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-15 16:42:53,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 16:42:53,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-15 16:42:53,607 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-15 16:42:53,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:53,607 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-15 16:42:53,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:53,608 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-15 16:42:53,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:53,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:53,608 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:53,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-15 16:42:53,809 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:53,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:53,810 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-15 16:42:53,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:53,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994220427] [2020-10-15 16:42:53,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:53,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:53,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994220427] [2020-10-15 16:42:53,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570065121] [2020-10-15 16:42:53,893 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 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 [2020-10-15 16:42:53,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:42:53,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:53,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:53,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:53,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:53,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:53,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 16:42:53,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652911303] [2020-10-15 16:42:53,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:53,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:53,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:53,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:53,984 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-15 16:42:54,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:54,309 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-15 16:42:54,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:42:54,310 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 16:42:54,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:54,311 INFO L225 Difference]: With dead ends: 77 [2020-10-15 16:42:54,311 INFO L226 Difference]: Without dead ends: 69 [2020-10-15 16:42:54,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:42:54,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-15 16:42:54,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-15 16:42:54,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 16:42:54,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-15 16:42:54,315 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-15 16:42:54,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:54,315 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-15 16:42:54,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:54,315 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-15 16:42:54,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:42:54,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:54,316 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:54,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-15 16:42:54,525 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:54,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:54,525 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-15 16:42:54,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:54,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486502560] [2020-10-15 16:42:54,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:54,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:54,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486502560] [2020-10-15 16:42:54,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76561591] [2020-10-15 16:42:54,622 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 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 [2020-10-15 16:42:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:54,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:54,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:54,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:54,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 16:42:54,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359505641] [2020-10-15 16:42:54,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:54,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:54,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:54,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:54,684 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-15 16:42:54,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:54,867 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-15 16:42:54,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:42:54,867 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 16:42:54,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:54,868 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:42:54,868 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 16:42:54,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:42:54,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 16:42:54,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-15 16:42:54,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 16:42:54,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 16:42:54,872 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-15 16:42:54,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:54,873 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 16:42:54,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:54,873 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 16:42:54,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:42:54,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:54,873 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:55,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-15 16:42:55,082 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:55,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:55,083 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-15 16:42:55,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:55,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116699769] [2020-10-15 16:42:55,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:55,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116699769] [2020-10-15 16:42:55,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375905475] [2020-10-15 16:42:55,187 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 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 [2020-10-15 16:42:55,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:55,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:55,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:55,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:55,243 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:55,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:55,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 16:42:55,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185786981] [2020-10-15 16:42:55,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:42:55,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:55,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:42:55,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:55,255 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-15 16:42:55,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:55,487 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-15 16:42:55,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:42:55,487 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 16:42:55,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:55,488 INFO L225 Difference]: With dead ends: 81 [2020-10-15 16:42:55,488 INFO L226 Difference]: Without dead ends: 75 [2020-10-15 16:42:55,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:42:55,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-15 16:42:55,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-15 16:42:55,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 16:42:55,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 16:42:55,491 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-15 16:42:55,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:55,491 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 16:42:55,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:42:55,492 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 16:42:55,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:42:55,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:55,492 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:55,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-15 16:42:55,697 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:55,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:55,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-15 16:42:55,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:55,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080366845] [2020-10-15 16:42:55,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:55,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080366845] [2020-10-15 16:42:55,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264575954] [2020-10-15 16:42:55,778 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 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 [2020-10-15 16:42:55,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:42:55,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:55,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:55,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:55,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:55,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:55,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 16:42:55,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235592753] [2020-10-15 16:42:55,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:55,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:55,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:55,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:55,899 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-15 16:42:56,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:56,099 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-15 16:42:56,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:42:56,100 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 16:42:56,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:56,100 INFO L225 Difference]: With dead ends: 78 [2020-10-15 16:42:56,100 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 16:42:56,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:42:56,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 16:42:56,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-15 16:42:56,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 16:42:56,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 16:42:56,103 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-15 16:42:56,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:56,103 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 16:42:56,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:56,104 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 16:42:56,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:42:56,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:56,104 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:56,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-15 16:42:56,311 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:56,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:56,312 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-15 16:42:56,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:56,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941029933] [2020-10-15 16:42:56,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:56,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:56,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:56,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941029933] [2020-10-15 16:42:56,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876212654] [2020-10-15 16:42:56,401 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 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 [2020-10-15 16:42:56,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:56,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:56,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:56,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:56,463 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:56,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:56,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 16:42:56,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805548230] [2020-10-15 16:42:56,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:42:56,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:56,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:42:56,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:56,478 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-15 16:42:56,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:56,762 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-15 16:42:56,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:42:56,762 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 16:42:56,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:56,763 INFO L225 Difference]: With dead ends: 77 [2020-10-15 16:42:56,763 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 16:42:56,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:42:56,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 16:42:56,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-15 16:42:56,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 16:42:56,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 16:42:56,768 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-15 16:42:56,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:56,768 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 16:42:56,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:42:56,768 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 16:42:56,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:42:56,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:56,769 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:56,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-15 16:42:56,979 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:56,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:56,979 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-15 16:42:56,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:56,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352043691] [2020-10-15 16:42:56,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:56,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:57,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:57,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352043691] [2020-10-15 16:42:57,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119824467] [2020-10-15 16:42:57,057 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 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 [2020-10-15 16:42:57,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 16:42:57,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:57,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:57,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:57,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:57,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:57,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 16:42:57,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715512496] [2020-10-15 16:42:57,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:57,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:57,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:57,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:57,117 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-15 16:42:57,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:57,373 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-15 16:42:57,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:42:57,373 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 16:42:57,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:57,374 INFO L225 Difference]: With dead ends: 74 [2020-10-15 16:42:57,374 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 16:42:57,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:42:57,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 16:42:57,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-15 16:42:57,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 16:42:57,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 16:42:57,378 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-15 16:42:57,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:57,378 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 16:42:57,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:57,378 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 16:42:57,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:42:57,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:57,379 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:57,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:57,589 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:57,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:57,589 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-15 16:42:57,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:57,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845317762] [2020-10-15 16:42:57,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:57,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:57,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845317762] [2020-10-15 16:42:57,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234714523] [2020-10-15 16:42:57,659 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 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 [2020-10-15 16:42:57,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:42:57,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:57,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:57,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:57,757 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:57,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:57,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 16:42:57,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570656218] [2020-10-15 16:42:57,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:42:57,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:57,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:42:57,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:57,768 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-15 16:42:58,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:58,121 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-15 16:42:58,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:42:58,125 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 16:42:58,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:58,126 INFO L225 Difference]: With dead ends: 73 [2020-10-15 16:42:58,126 INFO L226 Difference]: Without dead ends: 67 [2020-10-15 16:42:58,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:42:58,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-15 16:42:58,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-15 16:42:58,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 16:42:58,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 16:42:58,130 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-15 16:42:58,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:58,130 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 16:42:58,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:42:58,130 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 16:42:58,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:42:58,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:58,131 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:58,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-15 16:42:58,340 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:58,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:58,340 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-15 16:42:58,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:58,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105863691] [2020-10-15 16:42:58,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:58,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:58,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105863691] [2020-10-15 16:42:58,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127898043] [2020-10-15 16:42:58,414 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 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 [2020-10-15 16:42:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:58,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:58,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:58,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:58,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:58,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 16:42:58,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221684298] [2020-10-15 16:42:58,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:58,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:58,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:58,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:58,479 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-15 16:42:58,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:58,857 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-15 16:42:58,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:42:58,858 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 16:42:58,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:58,859 INFO L225 Difference]: With dead ends: 89 [2020-10-15 16:42:58,860 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 16:42:58,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:42:58,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 16:42:58,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-15 16:42:58,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 16:42:58,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-15 16:42:58,864 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-15 16:42:58,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:58,865 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-15 16:42:58,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:58,865 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-15 16:42:58,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:42:58,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:58,866 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:59,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:59,076 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:59,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:59,077 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-15 16:42:59,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:59,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715128659] [2020-10-15 16:42:59,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:59,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715128659] [2020-10-15 16:42:59,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978674735] [2020-10-15 16:42:59,147 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 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 [2020-10-15 16:42:59,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:59,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:59,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:42:59,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:59,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:59,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 16:42:59,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559158931] [2020-10-15 16:42:59,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:42:59,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:59,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:42:59,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:59,217 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-15 16:42:59,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:59,544 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-10-15 16:42:59,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:42:59,545 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 16:42:59,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:59,545 INFO L225 Difference]: With dead ends: 68 [2020-10-15 16:42:59,545 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 16:42:59,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:42:59,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 16:42:59,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-10-15 16:42:59,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-15 16:42:59,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-15 16:42:59,550 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-15 16:42:59,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:59,551 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-15 16:42:59,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:42:59,551 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-15 16:42:59,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:42:59,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:59,551 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:59,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-15 16:42:59,756 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:59,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:59,756 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-15 16:42:59,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:59,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335892133] [2020-10-15 16:42:59,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:59,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335892133] [2020-10-15 16:42:59,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477771190] [2020-10-15 16:42:59,824 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 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 [2020-10-15 16:42:59,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:42:59,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:59,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:59,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:59,893 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:59,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:59,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:59,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 16:42:59,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173695556] [2020-10-15 16:42:59,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:42:59,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:59,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:42:59,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:59,904 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-15 16:43:00,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:00,263 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-15 16:43:00,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:43:00,264 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 16:43:00,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:00,265 INFO L225 Difference]: With dead ends: 76 [2020-10-15 16:43:00,265 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 16:43:00,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:43:00,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 16:43:00,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-15 16:43:00,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 16:43:00,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-15 16:43:00,269 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-15 16:43:00,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:00,269 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-15 16:43:00,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:43:00,270 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-15 16:43:00,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:43:00,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:00,270 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:00,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:00,479 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:00,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:00,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-15 16:43:00,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:00,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178851986] [2020-10-15 16:43:00,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:00,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178851986] [2020-10-15 16:43:00,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507790152] [2020-10-15 16:43:00,604 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 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 [2020-10-15 16:43:00,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:00,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:00,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:43:00,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:00,666 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:43:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:00,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:00,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 16:43:00,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016718473] [2020-10-15 16:43:00,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:43:00,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:00,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:43:00,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:43:00,679 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-15 16:43:01,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:01,052 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-15 16:43:01,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:43:01,052 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 16:43:01,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:01,053 INFO L225 Difference]: With dead ends: 66 [2020-10-15 16:43:01,053 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 16:43:01,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:43:01,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 16:43:01,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-15 16:43:01,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 16:43:01,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-15 16:43:01,059 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-15 16:43:01,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:01,059 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-15 16:43:01,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:43:01,059 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-15 16:43:01,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:43:01,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:01,060 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:01,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-15 16:43:01,269 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:01,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:01,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-15 16:43:01,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:01,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510762028] [2020-10-15 16:43:01,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:01,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:01,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510762028] [2020-10-15 16:43:01,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514066957] [2020-10-15 16:43:01,376 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 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 [2020-10-15 16:43:01,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 16:43:01,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:01,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:43:01,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:01,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:01,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:01,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 16:43:01,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318697808] [2020-10-15 16:43:01,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:43:01,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:01,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:43:01,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:43:01,433 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-15 16:43:01,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:01,608 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-15 16:43:01,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:43:01,609 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 16:43:01,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:01,610 INFO L225 Difference]: With dead ends: 72 [2020-10-15 16:43:01,610 INFO L226 Difference]: Without dead ends: 66 [2020-10-15 16:43:01,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:43:01,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-15 16:43:01,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-15 16:43:01,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 16:43:01,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-15 16:43:01,614 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-15 16:43:01,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:01,614 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-15 16:43:01,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:43:01,614 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-15 16:43:01,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:43:01,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:01,616 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:01,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-15 16:43:01,817 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:01,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:01,818 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-15 16:43:01,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:01,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108412740] [2020-10-15 16:43:01,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:01,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:01,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:01,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108412740] [2020-10-15 16:43:01,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241256704] [2020-10-15 16:43:01,929 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 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 [2020-10-15 16:43:01,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 16:43:01,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:01,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:43:01,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:01,989 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:02,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:02,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:02,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 16:43:02,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478992594] [2020-10-15 16:43:02,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:43:02,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:02,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:43:02,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:43:02,003 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-15 16:43:02,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:02,230 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-15 16:43:02,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:43:02,231 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 16:43:02,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:02,232 INFO L225 Difference]: With dead ends: 82 [2020-10-15 16:43:02,232 INFO L226 Difference]: Without dead ends: 76 [2020-10-15 16:43:02,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:43:02,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-15 16:43:02,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-15 16:43:02,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 16:43:02,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-15 16:43:02,235 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-15 16:43:02,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:02,235 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-15 16:43:02,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:43:02,235 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-15 16:43:02,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:43:02,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:02,236 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:02,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-15 16:43:02,444 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:02,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:02,444 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-15 16:43:02,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:02,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565094130] [2020-10-15 16:43:02,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:02,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565094130] [2020-10-15 16:43:02,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550930573] [2020-10-15 16:43:02,540 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 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 [2020-10-15 16:43:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:02,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:43:02,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:02,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:02,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:02,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 16:43:02,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646993561] [2020-10-15 16:43:02,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:43:02,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:02,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:43:02,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:43:02,598 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-15 16:43:02,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:02,837 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-15 16:43:02,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:43:02,837 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 16:43:02,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:02,839 INFO L225 Difference]: With dead ends: 83 [2020-10-15 16:43:02,839 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 16:43:02,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:43:02,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 16:43:02,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-15 16:43:02,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 16:43:02,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-15 16:43:02,842 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-15 16:43:02,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:02,843 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-15 16:43:02,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:43:02,843 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-15 16:43:02,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:43:02,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:02,843 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:03,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-15 16:43:03,047 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:03,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:03,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-15 16:43:03,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:03,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133909253] [2020-10-15 16:43:03,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:03,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133909253] [2020-10-15 16:43:03,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718394385] [2020-10-15 16:43:03,158 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 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 [2020-10-15 16:43:03,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:03,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:03,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:43:03,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:03,241 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:03,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:03,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 16:43:03,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600290683] [2020-10-15 16:43:03,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:43:03,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:03,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:43:03,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:43:03,260 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-15 16:43:03,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:03,535 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-15 16:43:03,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:43:03,538 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 16:43:03,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:03,539 INFO L225 Difference]: With dead ends: 89 [2020-10-15 16:43:03,539 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 16:43:03,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:43:03,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 16:43:03,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-15 16:43:03,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 16:43:03,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-15 16:43:03,541 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-15 16:43:03,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:03,542 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-15 16:43:03,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:43:03,542 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-15 16:43:03,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:43:03,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:03,542 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:03,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:03,750 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:03,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:03,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-15 16:43:03,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:03,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007890685] [2020-10-15 16:43:03,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:03,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:03,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007890685] [2020-10-15 16:43:03,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54537735] [2020-10-15 16:43:03,843 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 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 [2020-10-15 16:43:03,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 16:43:03,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:03,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:43:03,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:03,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:03,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:03,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 16:43:03,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425362914] [2020-10-15 16:43:03,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:43:03,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:03,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:43:03,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:43:03,898 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-15 16:43:04,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:04,180 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-15 16:43:04,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:43:04,180 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 16:43:04,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:04,181 INFO L225 Difference]: With dead ends: 89 [2020-10-15 16:43:04,181 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 16:43:04,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:43:04,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 16:43:04,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-15 16:43:04,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 16:43:04,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 16:43:04,185 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-15 16:43:04,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:04,185 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 16:43:04,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:43:04,185 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 16:43:04,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:43:04,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:04,186 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:04,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:04,394 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:04,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:04,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-15 16:43:04,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:04,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74599827] [2020-10-15 16:43:04,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:04,482 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:04,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74599827] [2020-10-15 16:43:04,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619432613] [2020-10-15 16:43:04,483 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 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 [2020-10-15 16:43:04,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:04,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:04,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:43:04,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:04,564 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:04,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:04,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 16:43:04,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950394437] [2020-10-15 16:43:04,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:43:04,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:04,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:43:04,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:43:04,582 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-15 16:43:04,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:04,945 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-15 16:43:04,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:43:04,945 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 16:43:04,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:04,946 INFO L225 Difference]: With dead ends: 86 [2020-10-15 16:43:04,946 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 16:43:04,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:43:04,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 16:43:04,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-15 16:43:04,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 16:43:04,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 16:43:04,950 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-15 16:43:04,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:04,950 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 16:43:04,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:43:04,951 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 16:43:04,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:43:04,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:04,951 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:05,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-15 16:43:05,160 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:05,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:05,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-15 16:43:05,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:05,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353478794] [2020-10-15 16:43:05,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:05,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:05,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353478794] [2020-10-15 16:43:05,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433215364] [2020-10-15 16:43:05,250 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 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 [2020-10-15 16:43:05,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 16:43:05,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:05,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:43:05,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:05,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:05,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:05,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 16:43:05,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916815534] [2020-10-15 16:43:05,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:43:05,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:05,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:43:05,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:43:05,321 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-15 16:43:05,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:05,662 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-15 16:43:05,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:43:05,663 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 16:43:05,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:05,664 INFO L225 Difference]: With dead ends: 87 [2020-10-15 16:43:05,664 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 16:43:05,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:43:05,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 16:43:05,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-15 16:43:05,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-15 16:43:05,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-15 16:43:05,669 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-15 16:43:05,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:05,669 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-15 16:43:05,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:43:05,669 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-15 16:43:05,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:43:05,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:05,670 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:05,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:05,872 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:05,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:05,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-15 16:43:05,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:05,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759391998] [2020-10-15 16:43:05,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:05,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:05,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:05,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759391998] [2020-10-15 16:43:05,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835948811] [2020-10-15 16:43:05,961 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 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 [2020-10-15 16:43:06,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 16:43:06,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:06,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:43:06,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:06,026 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:06,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:06,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 16:43:06,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906423254] [2020-10-15 16:43:06,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:43:06,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:06,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:43:06,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:43:06,043 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-15 16:43:06,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:06,489 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-15 16:43:06,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:43:06,489 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 16:43:06,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:06,490 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:43:06,490 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 16:43:06,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:43:06,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 16:43:06,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-15 16:43:06,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 16:43:06,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-15 16:43:06,493 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-15 16:43:06,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:06,493 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-15 16:43:06,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:43:06,493 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-15 16:43:06,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:43:06,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:06,493 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:06,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-15 16:43:06,694 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:06,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:06,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-15 16:43:06,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:06,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918126741] [2020-10-15 16:43:06,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:06,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:06,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:06,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918126741] [2020-10-15 16:43:06,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424012730] [2020-10-15 16:43:06,780 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 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 [2020-10-15 16:43:06,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:06,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:43:06,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:06,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:06,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 16:43:06,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292261030] [2020-10-15 16:43:06,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:43:06,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:06,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:43:06,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:43:06,842 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-15 16:43:07,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:07,221 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-15 16:43:07,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:43:07,222 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 16:43:07,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:07,223 INFO L225 Difference]: With dead ends: 104 [2020-10-15 16:43:07,223 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 16:43:07,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:43:07,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 16:43:07,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-15 16:43:07,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 16:43:07,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-15 16:43:07,226 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-15 16:43:07,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:07,226 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-15 16:43:07,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:43:07,227 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-15 16:43:07,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:43:07,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:07,227 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:07,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-15 16:43:07,428 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:07,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:07,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-15 16:43:07,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:07,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235817769] [2020-10-15 16:43:07,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:07,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:07,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:07,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235817769] [2020-10-15 16:43:07,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341261762] [2020-10-15 16:43:07,511 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 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 [2020-10-15 16:43:07,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:07,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:07,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:43:07,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:07,584 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:07,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:07,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 16:43:07,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344530631] [2020-10-15 16:43:07,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:43:07,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:07,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:43:07,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:43:07,594 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-15 16:43:08,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:08,069 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-15 16:43:08,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:43:08,070 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 16:43:08,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:08,071 INFO L225 Difference]: With dead ends: 85 [2020-10-15 16:43:08,071 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 16:43:08,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:43:08,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 16:43:08,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-15 16:43:08,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 16:43:08,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-15 16:43:08,075 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-15 16:43:08,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:08,075 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-15 16:43:08,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:43:08,075 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-15 16:43:08,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:43:08,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:08,076 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:08,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-15 16:43:08,287 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:08,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:08,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-15 16:43:08,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:08,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271072011] [2020-10-15 16:43:08,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:08,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:08,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271072011] [2020-10-15 16:43:08,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599871030] [2020-10-15 16:43:08,410 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 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 [2020-10-15 16:43:08,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 16:43:08,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:08,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:43:08,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:08,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:08,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 16:43:08,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308136354] [2020-10-15 16:43:08,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:43:08,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:08,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:43:08,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:43:08,470 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-15 16:43:08,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:08,666 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-15 16:43:08,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:43:08,667 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 16:43:08,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:08,667 INFO L225 Difference]: With dead ends: 94 [2020-10-15 16:43:08,667 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 16:43:08,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:43:08,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 16:43:08,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-10-15 16:43:08,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 16:43:08,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 16:43:08,670 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 16:43:08,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:08,670 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 16:43:08,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:43:08,670 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 16:43:08,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:43:08,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:08,671 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:08,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-15 16:43:08,878 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:08,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:08,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-10-15 16:43:08,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:08,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466528153] [2020-10-15 16:43:08,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:09,029 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:09,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466528153] [2020-10-15 16:43:09,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511273001] [2020-10-15 16:43:09,030 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 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 [2020-10-15 16:43:09,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:09,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:09,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:43:09,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:09,090 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:09,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:09,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 16:43:09,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908827425] [2020-10-15 16:43:09,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:09,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:09,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:09,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:09,101 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 16:43:09,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:09,398 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-10-15 16:43:09,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:43:09,399 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 16:43:09,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:09,400 INFO L225 Difference]: With dead ends: 91 [2020-10-15 16:43:09,400 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 16:43:09,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:43:09,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 16:43:09,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-15 16:43:09,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:43:09,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 16:43:09,402 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 16:43:09,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:09,402 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 16:43:09,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:09,402 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 16:43:09,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:43:09,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:09,403 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:09,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-15 16:43:09,603 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:09,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:09,604 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-10-15 16:43:09,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:09,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644409468] [2020-10-15 16:43:09,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:09,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644409468] [2020-10-15 16:43:09,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359374021] [2020-10-15 16:43:09,718 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 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 [2020-10-15 16:43:09,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 16:43:09,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:09,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:43:09,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:09,774 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:09,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:09,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 16:43:09,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469863408] [2020-10-15 16:43:09,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:43:09,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:09,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:43:09,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:43:09,775 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 16:43:10,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:10,051 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-15 16:43:10,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:43:10,052 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 16:43:10,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:10,053 INFO L225 Difference]: With dead ends: 88 [2020-10-15 16:43:10,053 INFO L226 Difference]: Without dead ends: 82 [2020-10-15 16:43:10,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:43:10,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-15 16:43:10,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-10-15 16:43:10,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 16:43:10,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 16:43:10,055 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 16:43:10,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:10,056 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 16:43:10,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:43:10,056 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 16:43:10,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:43:10,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:10,056 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:10,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:10,259 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:10,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:10,259 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-10-15 16:43:10,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:10,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667256074] [2020-10-15 16:43:10,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:10,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667256074] [2020-10-15 16:43:10,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482322223] [2020-10-15 16:43:10,370 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 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 [2020-10-15 16:43:10,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 16:43:10,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:10,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:43:10,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:10,434 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:10,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:10,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 16:43:10,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071559630] [2020-10-15 16:43:10,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:10,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:10,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:10,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:10,445 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 16:43:10,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:10,810 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-10-15 16:43:10,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:43:10,811 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 16:43:10,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:10,812 INFO L225 Difference]: With dead ends: 87 [2020-10-15 16:43:10,812 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 16:43:10,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:43:10,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 16:43:10,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-15 16:43:10,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:43:10,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 16:43:10,816 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 16:43:10,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:10,816 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 16:43:10,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:10,816 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 16:43:10,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:43:10,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:10,817 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:11,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:11,023 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:11,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:11,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-10-15 16:43:11,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:11,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532393396] [2020-10-15 16:43:11,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:11,116 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:11,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532393396] [2020-10-15 16:43:11,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289062605] [2020-10-15 16:43:11,117 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 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 [2020-10-15 16:43:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:11,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:43:11,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:11,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:11,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:11,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 16:43:11,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522038186] [2020-10-15 16:43:11,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:43:11,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:11,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:43:11,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:43:11,189 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 16:43:11,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:11,486 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-15 16:43:11,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:43:11,487 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 16:43:11,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:11,487 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:43:11,488 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 16:43:11,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:43:11,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 16:43:11,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-15 16:43:11,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 16:43:11,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 16:43:11,490 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 16:43:11,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:11,491 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 16:43:11,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:43:11,491 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 16:43:11,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:43:11,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:11,491 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:11,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-15 16:43:11,693 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:11,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:11,694 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-10-15 16:43:11,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:11,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113498110] [2020-10-15 16:43:11,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:11,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:11,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:11,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113498110] [2020-10-15 16:43:11,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66170854] [2020-10-15 16:43:11,796 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 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 [2020-10-15 16:43:11,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:11,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:11,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:43:11,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:11,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:11,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:11,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 16:43:11,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3644032] [2020-10-15 16:43:11,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:11,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:11,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:11,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:11,872 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 16:43:12,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:12,309 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-15 16:43:12,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:43:12,310 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 16:43:12,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:12,310 INFO L225 Difference]: With dead ends: 83 [2020-10-15 16:43:12,311 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 16:43:12,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:43:12,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 16:43:12,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-15 16:43:12,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:43:12,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 16:43:12,314 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 16:43:12,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:12,314 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 16:43:12,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:12,315 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 16:43:12,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:43:12,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:12,315 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:12,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:12,517 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:12,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:12,517 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-10-15 16:43:12,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:12,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317622241] [2020-10-15 16:43:12,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:12,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317622241] [2020-10-15 16:43:12,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125146812] [2020-10-15 16:43:12,616 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 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 [2020-10-15 16:43:12,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 16:43:12,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:12,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:43:12,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:12,673 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:12,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:12,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 16:43:12,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606884359] [2020-10-15 16:43:12,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:43:12,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:12,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:43:12,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:43:12,674 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 16:43:13,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:13,022 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-15 16:43:13,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:43:13,022 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 16:43:13,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:13,023 INFO L225 Difference]: With dead ends: 80 [2020-10-15 16:43:13,023 INFO L226 Difference]: Without dead ends: 74 [2020-10-15 16:43:13,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:43:13,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-15 16:43:13,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-15 16:43:13,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 16:43:13,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 16:43:13,030 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 16:43:13,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:13,030 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 16:43:13,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:43:13,030 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 16:43:13,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:43:13,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:13,031 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:13,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-15 16:43:13,231 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:13,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:13,232 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-10-15 16:43:13,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:13,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469156804] [2020-10-15 16:43:13,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:13,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469156804] [2020-10-15 16:43:13,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64912390] [2020-10-15 16:43:13,323 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 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 [2020-10-15 16:43:13,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:13,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:13,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:43:13,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:13,383 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:13,399 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:13,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:13,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 16:43:13,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941275992] [2020-10-15 16:43:13,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:13,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:13,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:13,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:13,400 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 16:43:13,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:13,893 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-10-15 16:43:13,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:43:13,900 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 16:43:13,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:13,901 INFO L225 Difference]: With dead ends: 79 [2020-10-15 16:43:13,901 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 16:43:13,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:43:13,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 16:43:13,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-15 16:43:13,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:43:13,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 16:43:13,903 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 16:43:13,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:13,904 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 16:43:13,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:13,904 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 16:43:13,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:43:13,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:13,904 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:14,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:14,111 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:14,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:14,112 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-10-15 16:43:14,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:14,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260659935] [2020-10-15 16:43:14,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:14,198 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:14,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260659935] [2020-10-15 16:43:14,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455226170] [2020-10-15 16:43:14,199 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 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 [2020-10-15 16:43:14,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 16:43:14,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:14,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:43:14,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:14,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:14,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 16:43:14,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046214756] [2020-10-15 16:43:14,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:43:14,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:14,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:43:14,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:43:14,270 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 16:43:14,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:14,652 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-15 16:43:14,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:43:14,653 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 16:43:14,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:14,654 INFO L225 Difference]: With dead ends: 95 [2020-10-15 16:43:14,654 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 16:43:14,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:43:14,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 16:43:14,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-10-15 16:43:14,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 16:43:14,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-10-15 16:43:14,656 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-10-15 16:43:14,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:14,657 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-10-15 16:43:14,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:43:14,657 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-10-15 16:43:14,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:43:14,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:14,657 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:14,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-15 16:43:14,858 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:14,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:14,859 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-10-15 16:43:14,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:14,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244825880] [2020-10-15 16:43:14,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:14,949 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:14,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244825880] [2020-10-15 16:43:14,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330972221] [2020-10-15 16:43:14,950 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 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 [2020-10-15 16:43:14,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 16:43:14,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:14,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:43:14,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:15,009 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:15,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:15,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 16:43:15,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743188496] [2020-10-15 16:43:15,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:15,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:15,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:15,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:15,023 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-10-15 16:43:15,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:15,541 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-10-15 16:43:15,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:43:15,542 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 16:43:15,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:15,543 INFO L225 Difference]: With dead ends: 76 [2020-10-15 16:43:15,543 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 16:43:15,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:43:15,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 16:43:15,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-10-15 16:43:15,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-15 16:43:15,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-10-15 16:43:15,545 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-10-15 16:43:15,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:15,545 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-10-15 16:43:15,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:15,546 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-10-15 16:43:15,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:43:15,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:15,546 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:15,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:15,747 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:15,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:15,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-10-15 16:43:15,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:15,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237520197] [2020-10-15 16:43:15,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:15,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:15,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237520197] [2020-10-15 16:43:15,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240325152] [2020-10-15 16:43:15,839 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 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 [2020-10-15 16:43:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:15,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:43:15,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:15,898 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:43:15,910 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:15,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:15,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 16:43:15,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442480529] [2020-10-15 16:43:15,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:15,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:15,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:15,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:15,912 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-10-15 16:43:16,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:16,391 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-10-15 16:43:16,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:43:16,392 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 16:43:16,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:16,393 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:43:16,393 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 16:43:16,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:43:16,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 16:43:16,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-15 16:43:16,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 16:43:16,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-15 16:43:16,396 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-10-15 16:43:16,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:16,396 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-15 16:43:16,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:16,396 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-15 16:43:16,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:16,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:16,396 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:16,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-15 16:43:16,598 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:16,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:16,598 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-10-15 16:43:16,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:16,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729578036] [2020-10-15 16:43:16,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:16,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729578036] [2020-10-15 16:43:16,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804754088] [2020-10-15 16:43:16,705 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 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 [2020-10-15 16:43:16,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:16,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:16,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:16,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:16,772 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:43:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:16,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:16,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:43:16,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152989873] [2020-10-15 16:43:16,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:16,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:16,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:16,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:16,787 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-10-15 16:43:17,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:17,305 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-10-15 16:43:17,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:43:17,306 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:43:17,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:17,307 INFO L225 Difference]: With dead ends: 72 [2020-10-15 16:43:17,307 INFO L226 Difference]: Without dead ends: 67 [2020-10-15 16:43:17,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:43:17,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-15 16:43:17,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-10-15 16:43:17,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 16:43:17,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-15 16:43:17,310 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-10-15 16:43:17,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:17,310 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-15 16:43:17,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:17,310 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-15 16:43:17,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:17,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:17,310 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:17,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-15 16:43:17,512 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:17,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:17,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-10-15 16:43:17,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:17,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54830857] [2020-10-15 16:43:17,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:17,643 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:17,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54830857] [2020-10-15 16:43:17,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101013716] [2020-10-15 16:43:17,644 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 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 [2020-10-15 16:43:17,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 16:43:17,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:17,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:17,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:17,695 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:17,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:17,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 16:43:17,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366286014] [2020-10-15 16:43:17,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:17,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:17,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:17,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:17,697 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-10-15 16:43:17,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:17,924 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-10-15 16:43:17,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:43:17,925 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 16:43:17,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:17,926 INFO L225 Difference]: With dead ends: 78 [2020-10-15 16:43:17,926 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 16:43:17,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:43:17,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 16:43:17,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-15 16:43:17,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 16:43:17,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-10-15 16:43:17,929 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-10-15 16:43:17,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:17,929 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-10-15 16:43:17,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:17,929 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-10-15 16:43:17,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:17,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:17,930 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:18,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:18,131 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:18,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:18,131 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-10-15 16:43:18,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:18,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913209483] [2020-10-15 16:43:18,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:18,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913209483] [2020-10-15 16:43:18,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600747018] [2020-10-15 16:43:18,272 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 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 [2020-10-15 16:43:18,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:18,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:18,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:18,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:18,331 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:18,341 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:18,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:18,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:43:18,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318485121] [2020-10-15 16:43:18,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:18,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:18,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:18,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:18,342 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-10-15 16:43:18,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:18,605 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-10-15 16:43:18,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:43:18,606 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:43:18,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:18,607 INFO L225 Difference]: With dead ends: 90 [2020-10-15 16:43:18,607 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 16:43:18,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:43:18,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 16:43:18,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-10-15 16:43:18,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 16:43:18,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-10-15 16:43:18,611 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-10-15 16:43:18,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:18,611 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-10-15 16:43:18,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:18,611 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-10-15 16:43:18,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:18,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:18,612 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:18,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:18,820 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:18,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:18,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-10-15 16:43:18,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:18,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908332795] [2020-10-15 16:43:18,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:18,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908332795] [2020-10-15 16:43:18,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259854279] [2020-10-15 16:43:18,944 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 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 [2020-10-15 16:43:18,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 16:43:18,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:18,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:18,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:18,997 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:18,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:18,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 16:43:18,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441651258] [2020-10-15 16:43:18,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:18,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:18,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:18,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:18,998 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-10-15 16:43:19,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:19,299 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-10-15 16:43:19,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:43:19,299 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 16:43:19,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:19,300 INFO L225 Difference]: With dead ends: 91 [2020-10-15 16:43:19,300 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 16:43:19,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:43:19,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 16:43:19,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-10-15 16:43:19,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-15 16:43:19,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-10-15 16:43:19,304 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-10-15 16:43:19,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:19,304 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-10-15 16:43:19,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:19,304 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-10-15 16:43:19,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:19,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:19,305 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:19,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:19,512 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:19,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:19,512 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-10-15 16:43:19,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:19,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096911060] [2020-10-15 16:43:19,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:19,635 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:19,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096911060] [2020-10-15 16:43:19,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041083797] [2020-10-15 16:43:19,635 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 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 [2020-10-15 16:43:19,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 16:43:19,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:19,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:19,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:19,695 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:19,705 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:19,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:19,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:43:19,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938434593] [2020-10-15 16:43:19,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:19,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:19,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:19,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:19,707 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-10-15 16:43:20,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:20,031 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-10-15 16:43:20,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:43:20,031 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:43:20,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:20,032 INFO L225 Difference]: With dead ends: 99 [2020-10-15 16:43:20,032 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 16:43:20,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:43:20,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 16:43:20,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-10-15 16:43:20,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 16:43:20,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-15 16:43:20,035 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-10-15 16:43:20,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:20,035 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-15 16:43:20,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:20,035 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-15 16:43:20,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:20,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:20,036 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:20,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:20,236 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:20,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:20,237 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-10-15 16:43:20,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:20,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511444543] [2020-10-15 16:43:20,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:20,353 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:20,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511444543] [2020-10-15 16:43:20,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367920695] [2020-10-15 16:43:20,354 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 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 [2020-10-15 16:43:20,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:20,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:20,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:20,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:20,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 16:43:20,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722208498] [2020-10-15 16:43:20,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:20,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:20,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:20,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:20,418 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-10-15 16:43:20,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:20,750 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-15 16:43:20,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:43:20,751 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 16:43:20,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:20,751 INFO L225 Difference]: With dead ends: 99 [2020-10-15 16:43:20,752 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 16:43:20,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:43:20,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 16:43:20,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-10-15 16:43:20,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 16:43:20,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-10-15 16:43:20,755 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-10-15 16:43:20,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:20,755 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-10-15 16:43:20,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:20,755 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-10-15 16:43:20,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:20,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:20,756 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:20,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-15 16:43:20,956 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:20,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:20,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-10-15 16:43:20,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:20,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418838213] [2020-10-15 16:43:20,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:20,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:21,080 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:21,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418838213] [2020-10-15 16:43:21,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271685552] [2020-10-15 16:43:21,081 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 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 [2020-10-15 16:43:21,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:21,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:21,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:21,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:21,148 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:21,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:21,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:43:21,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324330140] [2020-10-15 16:43:21,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:21,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:21,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:21,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:21,159 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-10-15 16:43:21,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:21,562 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-10-15 16:43:21,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:43:21,563 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:43:21,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:21,564 INFO L225 Difference]: With dead ends: 96 [2020-10-15 16:43:21,564 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 16:43:21,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:43:21,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 16:43:21,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-10-15 16:43:21,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 16:43:21,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-10-15 16:43:21,567 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-10-15 16:43:21,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:21,567 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-10-15 16:43:21,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:21,567 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-10-15 16:43:21,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:21,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:21,568 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:21,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:21,769 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:21,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:21,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-10-15 16:43:21,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:21,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982423914] [2020-10-15 16:43:21,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:21,880 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:21,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982423914] [2020-10-15 16:43:21,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797928846] [2020-10-15 16:43:21,881 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 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 [2020-10-15 16:43:21,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 16:43:21,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:21,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:21,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:21,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:21,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 16:43:21,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771168130] [2020-10-15 16:43:21,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:21,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:21,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:21,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:21,940 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-10-15 16:43:22,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:22,311 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-10-15 16:43:22,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:43:22,312 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 16:43:22,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:22,313 INFO L225 Difference]: With dead ends: 97 [2020-10-15 16:43:22,313 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 16:43:22,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:43:22,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 16:43:22,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-10-15 16:43:22,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 16:43:22,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 16:43:22,316 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-10-15 16:43:22,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:22,316 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 16:43:22,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:22,316 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 16:43:22,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:22,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:22,317 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:22,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-15 16:43:22,525 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:22,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:22,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-10-15 16:43:22,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:22,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457139288] [2020-10-15 16:43:22,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:22,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:22,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457139288] [2020-10-15 16:43:22,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501049544] [2020-10-15 16:43:22,632 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 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 [2020-10-15 16:43:22,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:22,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:22,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:22,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:22,731 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:22,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:22,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:43:22,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883210399] [2020-10-15 16:43:22,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:22,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:22,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:22,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:22,748 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-10-15 16:43:23,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:23,409 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-15 16:43:23,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:43:23,410 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:43:23,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:23,412 INFO L225 Difference]: With dead ends: 94 [2020-10-15 16:43:23,412 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 16:43:23,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 16:43:23,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 16:43:23,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-10-15 16:43:23,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:43:23,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 16:43:23,416 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-10-15 16:43:23,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:23,417 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 16:43:23,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:23,417 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 16:43:23,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:23,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:23,418 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:23,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:23,629 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:23,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:23,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-10-15 16:43:23,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:23,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188047614] [2020-10-15 16:43:23,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:23,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:23,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188047614] [2020-10-15 16:43:23,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901081370] [2020-10-15 16:43:23,780 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 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 [2020-10-15 16:43:23,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 16:43:23,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:23,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:23,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:23,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:23,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 16:43:23,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263685253] [2020-10-15 16:43:23,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:23,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:23,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:23,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:23,876 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-10-15 16:43:24,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:24,289 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-10-15 16:43:24,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:43:24,289 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 16:43:24,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:24,290 INFO L225 Difference]: With dead ends: 95 [2020-10-15 16:43:24,290 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 16:43:24,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:43:24,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 16:43:24,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-10-15 16:43:24,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 16:43:24,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-15 16:43:24,293 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-10-15 16:43:24,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:24,294 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-15 16:43:24,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:24,294 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-15 16:43:24,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:24,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:24,295 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:24,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-15 16:43:24,503 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:24,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:24,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-10-15 16:43:24,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:24,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246114145] [2020-10-15 16:43:24,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:24,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246114145] [2020-10-15 16:43:24,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904511700] [2020-10-15 16:43:24,619 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 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 [2020-10-15 16:43:24,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 16:43:24,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:24,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:24,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:24,693 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:24,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:24,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:43:24,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106115578] [2020-10-15 16:43:24,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:24,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:24,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:24,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:24,705 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-15 16:43:25,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:25,249 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-15 16:43:25,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:43:25,250 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:43:25,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:25,251 INFO L225 Difference]: With dead ends: 92 [2020-10-15 16:43:25,251 INFO L226 Difference]: Without dead ends: 86 [2020-10-15 16:43:25,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:43:25,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-15 16:43:25,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-10-15 16:43:25,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 16:43:25,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-15 16:43:25,254 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-10-15 16:43:25,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:25,254 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-15 16:43:25,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:25,255 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-15 16:43:25,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:25,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:25,255 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:25,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:25,463 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:25,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:25,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-10-15 16:43:25,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:25,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962196231] [2020-10-15 16:43:25,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:25,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:25,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962196231] [2020-10-15 16:43:25,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992495853] [2020-10-15 16:43:25,556 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 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 [2020-10-15 16:43:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:25,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:25,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:25,610 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:25,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:25,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 16:43:25,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618568132] [2020-10-15 16:43:25,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:25,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:25,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:25,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:25,612 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-10-15 16:43:26,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:26,066 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-10-15 16:43:26,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:43:26,067 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 16:43:26,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:26,068 INFO L225 Difference]: With dead ends: 112 [2020-10-15 16:43:26,068 INFO L226 Difference]: Without dead ends: 106 [2020-10-15 16:43:26,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:43:26,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-15 16:43:26,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-10-15 16:43:26,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 16:43:26,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-10-15 16:43:26,071 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-10-15 16:43:26,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:26,071 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-10-15 16:43:26,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:26,071 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-10-15 16:43:26,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:26,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:26,072 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:26,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:26,274 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:26,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:26,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-10-15 16:43:26,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:26,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38158237] [2020-10-15 16:43:26,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:26,373 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:26,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38158237] [2020-10-15 16:43:26,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672746018] [2020-10-15 16:43:26,373 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 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 [2020-10-15 16:43:26,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:26,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:26,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:26,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:26,455 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:26,470 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:26,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:26,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:43:26,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920365764] [2020-10-15 16:43:26,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:26,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:26,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:26,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:26,473 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-10-15 16:43:27,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:27,093 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-10-15 16:43:27,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:43:27,094 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:43:27,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:27,095 INFO L225 Difference]: With dead ends: 93 [2020-10-15 16:43:27,095 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 16:43:27,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:43:27,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 16:43:27,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-10-15 16:43:27,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 16:43:27,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-15 16:43:27,098 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-15 16:43:27,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:27,098 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-15 16:43:27,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:27,098 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-15 16:43:27,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:27,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:27,099 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:27,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:27,308 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:27,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:27,308 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-10-15 16:43:27,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:27,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114232145] [2020-10-15 16:43:27,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:27,467 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:27,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114232145] [2020-10-15 16:43:27,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763865479] [2020-10-15 16:43:27,467 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 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 [2020-10-15 16:43:27,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 16:43:27,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:27,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:27,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:27,530 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:27,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:27,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 16:43:27,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468521308] [2020-10-15 16:43:27,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:27,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:27,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:27,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:27,531 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-15 16:43:27,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:27,809 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-10-15 16:43:27,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:43:27,810 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 16:43:27,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:27,811 INFO L225 Difference]: With dead ends: 104 [2020-10-15 16:43:27,811 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 16:43:27,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:43:27,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 16:43:27,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-10-15 16:43:27,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:43:27,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 16:43:27,813 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 16:43:27,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:27,814 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 16:43:27,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:27,814 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 16:43:27,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:27,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:27,814 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:28,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:28,015 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:28,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:28,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-10-15 16:43:28,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:28,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311971538] [2020-10-15 16:43:28,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:28,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311971538] [2020-10-15 16:43:28,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177036292] [2020-10-15 16:43:28,170 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 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 [2020-10-15 16:43:28,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:28,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:28,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:28,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:28,238 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:28,247 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:28,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:28,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:28,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310872931] [2020-10-15 16:43:28,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:28,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:28,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:28,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:28,248 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 16:43:28,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:28,616 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-10-15 16:43:28,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:43:28,616 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:28,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:28,617 INFO L225 Difference]: With dead ends: 101 [2020-10-15 16:43:28,618 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 16:43:28,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:43:28,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 16:43:28,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-10-15 16:43:28,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:43:28,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 16:43:28,621 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 16:43:28,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:28,621 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 16:43:28,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:28,621 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 16:43:28,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:28,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:28,622 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:28,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:28,822 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:28,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:28,823 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-10-15 16:43:28,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:28,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470382821] [2020-10-15 16:43:28,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:28,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:28,961 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:28,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470382821] [2020-10-15 16:43:28,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42313466] [2020-10-15 16:43:28,962 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 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 [2020-10-15 16:43:29,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 16:43:29,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:29,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:29,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:29,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:29,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 16:43:29,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075054409] [2020-10-15 16:43:29,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:29,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:29,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:29,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:29,030 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 16:43:29,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:29,351 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-10-15 16:43:29,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:43:29,351 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 16:43:29,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:29,352 INFO L225 Difference]: With dead ends: 98 [2020-10-15 16:43:29,353 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 16:43:29,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:43:29,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 16:43:29,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-10-15 16:43:29,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:43:29,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 16:43:29,356 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 16:43:29,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:29,356 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 16:43:29,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:29,357 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 16:43:29,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:29,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:29,357 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:29,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:29,562 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:29,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:29,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-10-15 16:43:29,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:29,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415324880] [2020-10-15 16:43:29,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:29,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:29,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415324880] [2020-10-15 16:43:29,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542382196] [2020-10-15 16:43:29,707 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 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 [2020-10-15 16:43:29,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 16:43:29,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:29,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:29,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:29,771 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:29,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:29,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:29,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096417852] [2020-10-15 16:43:29,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:29,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:29,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:29,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:29,782 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 16:43:30,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:30,203 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-10-15 16:43:30,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:43:30,204 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:30,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:30,205 INFO L225 Difference]: With dead ends: 97 [2020-10-15 16:43:30,205 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 16:43:30,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:43:30,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 16:43:30,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-10-15 16:43:30,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:43:30,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 16:43:30,209 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 16:43:30,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:30,209 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 16:43:30,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:30,209 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 16:43:30,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:30,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:30,210 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:30,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:30,419 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:30,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:30,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-10-15 16:43:30,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:30,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904470498] [2020-10-15 16:43:30,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:30,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904470498] [2020-10-15 16:43:30,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886433130] [2020-10-15 16:43:30,550 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 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 [2020-10-15 16:43:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:30,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:30,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:30,612 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:30,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:30,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 16:43:30,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380472806] [2020-10-15 16:43:30,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:30,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:30,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:30,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:30,614 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 16:43:31,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:31,009 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-10-15 16:43:31,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:43:31,010 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 16:43:31,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:31,011 INFO L225 Difference]: With dead ends: 94 [2020-10-15 16:43:31,011 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 16:43:31,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:43:31,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 16:43:31,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-10-15 16:43:31,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:43:31,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 16:43:31,014 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 16:43:31,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:31,014 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 16:43:31,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:31,014 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 16:43:31,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:31,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:31,015 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:31,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-15 16:43:31,224 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:31,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:31,224 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-10-15 16:43:31,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:31,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733774625] [2020-10-15 16:43:31,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:31,360 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:31,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733774625] [2020-10-15 16:43:31,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932802124] [2020-10-15 16:43:31,361 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 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 [2020-10-15 16:43:31,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:31,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:31,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:31,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:31,425 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:31,437 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:31,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:31,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:31,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010478102] [2020-10-15 16:43:31,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:31,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:31,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:31,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:31,439 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 16:43:31,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:31,929 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-15 16:43:31,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:43:31,929 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:31,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:31,930 INFO L225 Difference]: With dead ends: 93 [2020-10-15 16:43:31,930 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 16:43:31,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:43:31,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 16:43:31,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-10-15 16:43:31,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:43:31,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 16:43:31,933 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 16:43:31,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:31,933 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 16:43:31,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:31,934 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 16:43:31,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:31,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:31,934 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:32,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:32,135 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:32,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:32,135 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-10-15 16:43:32,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:32,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712294456] [2020-10-15 16:43:32,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:32,260 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:32,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712294456] [2020-10-15 16:43:32,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658101164] [2020-10-15 16:43:32,261 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 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 [2020-10-15 16:43:32,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 16:43:32,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:32,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:32,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:32,375 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:32,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:32,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 16:43:32,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832571431] [2020-10-15 16:43:32,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:32,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:32,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:32,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:32,377 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 16:43:32,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:32,933 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-10-15 16:43:32,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:43:32,934 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 16:43:32,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:32,935 INFO L225 Difference]: With dead ends: 90 [2020-10-15 16:43:32,936 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 16:43:32,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 16:43:32,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 16:43:32,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-10-15 16:43:32,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:43:32,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 16:43:32,939 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 16:43:32,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:32,939 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 16:43:32,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:32,940 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 16:43:32,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:32,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:32,941 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:33,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-15 16:43:33,151 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:33,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:33,151 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-10-15 16:43:33,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:33,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234242697] [2020-10-15 16:43:33,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:33,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:33,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234242697] [2020-10-15 16:43:33,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403349176] [2020-10-15 16:43:33,287 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 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 [2020-10-15 16:43:33,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:33,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:33,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:33,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:33,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:33,366 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:33,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:33,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:33,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628856834] [2020-10-15 16:43:33,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:33,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:33,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:33,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:33,368 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 16:43:33,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:33,932 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-15 16:43:33,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:43:33,932 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:33,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:33,933 INFO L225 Difference]: With dead ends: 89 [2020-10-15 16:43:33,934 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 16:43:33,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:43:33,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 16:43:33,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-10-15 16:43:33,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:43:33,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 16:43:33,937 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 16:43:33,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:33,937 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 16:43:33,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:33,937 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 16:43:33,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:33,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:33,938 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:34,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:34,139 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:34,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:34,139 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-10-15 16:43:34,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:34,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265276226] [2020-10-15 16:43:34,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:34,262 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:34,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265276226] [2020-10-15 16:43:34,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868860085] [2020-10-15 16:43:34,263 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 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 [2020-10-15 16:43:34,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 16:43:34,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:34,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:34,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:34,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:34,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 16:43:34,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439153122] [2020-10-15 16:43:34,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:34,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:34,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:34,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:34,325 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 16:43:34,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:34,803 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-10-15 16:43:34,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:43:34,804 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 16:43:34,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:34,805 INFO L225 Difference]: With dead ends: 86 [2020-10-15 16:43:34,805 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 16:43:34,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:43:34,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 16:43:34,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-10-15 16:43:34,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:43:34,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 16:43:34,809 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 16:43:34,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:34,809 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 16:43:34,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:34,809 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 16:43:34,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:34,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:34,810 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:35,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:35,020 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:35,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:35,021 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-10-15 16:43:35,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:35,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522982553] [2020-10-15 16:43:35,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:35,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:35,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522982553] [2020-10-15 16:43:35,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31437901] [2020-10-15 16:43:35,144 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 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 [2020-10-15 16:43:35,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 16:43:35,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:35,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:35,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:35,210 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:35,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:35,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:35,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843430230] [2020-10-15 16:43:35,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:35,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:35,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:35,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:35,224 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 16:43:35,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:35,885 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-10-15 16:43:35,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:43:35,885 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:35,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:35,886 INFO L225 Difference]: With dead ends: 85 [2020-10-15 16:43:35,886 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 16:43:35,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:43:35,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 16:43:35,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-15 16:43:35,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:43:35,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 16:43:35,889 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 16:43:35,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:35,889 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 16:43:35,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:35,890 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 16:43:35,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:35,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:35,890 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:36,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:36,100 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:36,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:36,100 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-10-15 16:43:36,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:36,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090015525] [2020-10-15 16:43:36,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:36,222 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:36,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090015525] [2020-10-15 16:43:36,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638538745] [2020-10-15 16:43:36,222 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 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 [2020-10-15 16:43:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:36,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:36,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:36,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:36,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 16:43:36,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599142903] [2020-10-15 16:43:36,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:36,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:36,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:36,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:36,284 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 16:43:36,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:36,811 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-15 16:43:36,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:43:36,812 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 16:43:36,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:36,813 INFO L225 Difference]: With dead ends: 101 [2020-10-15 16:43:36,813 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 16:43:36,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:43:36,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 16:43:36,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-10-15 16:43:36,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 16:43:36,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-10-15 16:43:36,817 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-10-15 16:43:36,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:36,817 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-10-15 16:43:36,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:36,817 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-10-15 16:43:36,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:36,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:36,818 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:37,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:37,019 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:37,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:37,019 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-10-15 16:43:37,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:37,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862251674] [2020-10-15 16:43:37,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:37,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:37,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862251674] [2020-10-15 16:43:37,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429440850] [2020-10-15 16:43:37,146 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 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 [2020-10-15 16:43:37,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:37,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:37,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:37,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:37,225 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:37,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:37,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:37,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632952187] [2020-10-15 16:43:37,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:37,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:37,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:37,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:37,227 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-10-15 16:43:37,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:37,833 INFO L93 Difference]: Finished difference Result 80 states and 197 transitions. [2020-10-15 16:43:37,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:43:37,834 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:37,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:37,834 INFO L225 Difference]: With dead ends: 80 [2020-10-15 16:43:37,835 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 16:43:37,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:43:37,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 16:43:37,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-10-15 16:43:37,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-15 16:43:37,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-10-15 16:43:37,837 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-10-15 16:43:37,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:37,837 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-10-15 16:43:37,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:37,838 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-10-15 16:43:37,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:37,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:37,839 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:38,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:38,048 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:38,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:38,049 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-10-15 16:43:38,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:38,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516610609] [2020-10-15 16:43:38,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:38,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:38,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516610609] [2020-10-15 16:43:38,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464327698] [2020-10-15 16:43:38,158 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 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 [2020-10-15 16:43:38,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 16:43:38,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:38,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:38,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:38,220 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:43:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:38,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:38,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:38,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265635608] [2020-10-15 16:43:38,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:38,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:38,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:38,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:38,236 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-10-15 16:43:38,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:38,859 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-15 16:43:38,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:43:38,860 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:38,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:38,860 INFO L225 Difference]: With dead ends: 92 [2020-10-15 16:43:38,861 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 16:43:38,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:43:38,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 16:43:38,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-10-15 16:43:38,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 16:43:38,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-15 16:43:38,864 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-10-15 16:43:38,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:38,864 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-15 16:43:38,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:38,864 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-15 16:43:38,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:38,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:38,865 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:39,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:39,066 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:39,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:39,066 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-10-15 16:43:39,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:39,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649336234] [2020-10-15 16:43:39,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:39,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649336234] [2020-10-15 16:43:39,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818587565] [2020-10-15 16:43:39,197 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 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 [2020-10-15 16:43:39,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:39,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:39,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:39,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:39,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:43:39,271 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:39,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:39,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:39,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440987523] [2020-10-15 16:43:39,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:39,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:39,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:39,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:39,273 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-10-15 16:43:39,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:39,952 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-10-15 16:43:39,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:43:39,953 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:39,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:39,954 INFO L225 Difference]: With dead ends: 78 [2020-10-15 16:43:39,954 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 16:43:39,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:43:39,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 16:43:39,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-10-15 16:43:39,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 16:43:39,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-15 16:43:39,956 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-10-15 16:43:39,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:39,956 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-15 16:43:39,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:39,957 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-15 16:43:39,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:39,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:39,957 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:40,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-15 16:43:40,158 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:40,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:40,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-10-15 16:43:40,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:40,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981632354] [2020-10-15 16:43:40,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:40,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:40,327 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:40,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981632354] [2020-10-15 16:43:40,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713819316] [2020-10-15 16:43:40,328 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 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 [2020-10-15 16:43:40,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 16:43:40,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:40,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:40,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:40,388 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:40,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:40,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:40,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518235625] [2020-10-15 16:43:40,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:40,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:40,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:40,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:40,389 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-10-15 16:43:40,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:40,664 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-15 16:43:40,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:43:40,665 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:40,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:40,666 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:43:40,666 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 16:43:40,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:43:40,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 16:43:40,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-10-15 16:43:40,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:43:40,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-10-15 16:43:40,668 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-10-15 16:43:40,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:40,668 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-10-15 16:43:40,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:40,669 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-10-15 16:43:40,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:40,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:40,669 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:40,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:40,870 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:40,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:40,870 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-10-15 16:43:40,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:40,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178488965] [2020-10-15 16:43:40,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:41,047 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:41,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178488965] [2020-10-15 16:43:41,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628229751] [2020-10-15 16:43:41,048 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 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 [2020-10-15 16:43:41,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 16:43:41,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:41,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:41,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:41,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:41,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:41,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:41,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234160949] [2020-10-15 16:43:41,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:41,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:41,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:41,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:41,129 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-10-15 16:43:41,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:41,489 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-10-15 16:43:41,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:43:41,490 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:41,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:41,491 INFO L225 Difference]: With dead ends: 98 [2020-10-15 16:43:41,491 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 16:43:41,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:43:41,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 16:43:41,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-10-15 16:43:41,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 16:43:41,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-10-15 16:43:41,494 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-10-15 16:43:41,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:41,495 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-10-15 16:43:41,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:41,495 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-10-15 16:43:41,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:41,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:41,495 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:41,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-10-15 16:43:41,704 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:41,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:41,704 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-10-15 16:43:41,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:41,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088372070] [2020-10-15 16:43:41,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:41,879 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:41,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088372070] [2020-10-15 16:43:41,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968766401] [2020-10-15 16:43:41,880 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 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 [2020-10-15 16:43:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:41,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:41,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:41,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:41,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:41,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006136252] [2020-10-15 16:43:41,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:41,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:41,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:41,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:41,939 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-10-15 16:43:42,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:42,310 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-15 16:43:42,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:43:42,311 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:42,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:42,312 INFO L225 Difference]: With dead ends: 99 [2020-10-15 16:43:42,312 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 16:43:42,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:43:42,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 16:43:42,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-10-15 16:43:42,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 16:43:42,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-10-15 16:43:42,315 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-10-15 16:43:42,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:42,315 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-10-15 16:43:42,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:42,315 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-10-15 16:43:42,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:42,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:42,316 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:42,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:42,516 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:42,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:42,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-10-15 16:43:42,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:42,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102713928] [2020-10-15 16:43:42,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:42,694 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:42,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102713928] [2020-10-15 16:43:42,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978484196] [2020-10-15 16:43:42,695 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 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 [2020-10-15 16:43:42,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:42,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:42,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:42,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:42,755 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:42,765 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:42,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:42,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:42,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357644067] [2020-10-15 16:43:42,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:42,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:42,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:42,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:42,767 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-10-15 16:43:43,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:43,173 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-10-15 16:43:43,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:43:43,174 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:43,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:43,175 INFO L225 Difference]: With dead ends: 109 [2020-10-15 16:43:43,175 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 16:43:43,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 16:43:43,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 16:43:43,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-10-15 16:43:43,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:43:43,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-10-15 16:43:43,178 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-10-15 16:43:43,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:43,178 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-10-15 16:43:43,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:43,178 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-10-15 16:43:43,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:43,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:43,179 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:43,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:43,387 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:43,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:43,387 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-10-15 16:43:43,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:43,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882802417] [2020-10-15 16:43:43,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:43,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882802417] [2020-10-15 16:43:43,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361569300] [2020-10-15 16:43:43,546 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 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 [2020-10-15 16:43:43,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 16:43:43,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:43,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:43,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:43,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:43,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:43,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560050809] [2020-10-15 16:43:43,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:43,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:43,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:43,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:43,605 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-10-15 16:43:44,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:44,018 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-10-15 16:43:44,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:43:44,018 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:44,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:44,019 INFO L225 Difference]: With dead ends: 109 [2020-10-15 16:43:44,020 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 16:43:44,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:43:44,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 16:43:44,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-10-15 16:43:44,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 16:43:44,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-10-15 16:43:44,024 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-10-15 16:43:44,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:44,024 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-10-15 16:43:44,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:44,024 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-10-15 16:43:44,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:44,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:44,025 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:44,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-15 16:43:44,230 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:44,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:44,230 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-10-15 16:43:44,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:44,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382054318] [2020-10-15 16:43:44,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:44,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382054318] [2020-10-15 16:43:44,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350156195] [2020-10-15 16:43:44,392 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 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 [2020-10-15 16:43:44,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:44,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:44,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:44,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:44,451 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:44,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:44,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:44,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318970401] [2020-10-15 16:43:44,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:44,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:44,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:44,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:44,462 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-10-15 16:43:44,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:44,945 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-10-15 16:43:44,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:43:44,945 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:44,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:44,946 INFO L225 Difference]: With dead ends: 106 [2020-10-15 16:43:44,947 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 16:43:44,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:43:44,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 16:43:44,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-15 16:43:44,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 16:43:44,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-15 16:43:44,951 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-10-15 16:43:44,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:44,951 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-15 16:43:44,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:44,952 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-15 16:43:44,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:44,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:44,952 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:45,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-15 16:43:45,161 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:45,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:45,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-10-15 16:43:45,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:45,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387835502] [2020-10-15 16:43:45,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:45,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:45,309 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:45,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387835502] [2020-10-15 16:43:45,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434359874] [2020-10-15 16:43:45,310 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 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 [2020-10-15 16:43:45,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 16:43:45,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:45,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:45,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:45,380 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:45,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:45,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:45,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404718381] [2020-10-15 16:43:45,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:45,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:45,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:45,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:45,382 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-10-15 16:43:45,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:45,907 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-10-15 16:43:45,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:43:45,908 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:45,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:45,909 INFO L225 Difference]: With dead ends: 107 [2020-10-15 16:43:45,909 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 16:43:45,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:43:45,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 16:43:45,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-15 16:43:45,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 16:43:45,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-10-15 16:43:45,913 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-10-15 16:43:45,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:45,913 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-10-15 16:43:45,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:45,914 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-10-15 16:43:45,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:45,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:45,914 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:46,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:46,125 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:46,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:46,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-10-15 16:43:46,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:46,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278570996] [2020-10-15 16:43:46,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:46,329 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:46,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278570996] [2020-10-15 16:43:46,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079576735] [2020-10-15 16:43:46,330 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 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 [2020-10-15 16:43:46,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 16:43:46,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:46,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:46,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:46,399 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:46,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:46,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:46,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281665614] [2020-10-15 16:43:46,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:46,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:46,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:46,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:46,412 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-10-15 16:43:46,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:46,978 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-10-15 16:43:46,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:43:46,979 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:46,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:46,980 INFO L225 Difference]: With dead ends: 104 [2020-10-15 16:43:46,980 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 16:43:46,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:43:46,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 16:43:46,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-10-15 16:43:46,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 16:43:46,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-10-15 16:43:46,984 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-10-15 16:43:46,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:46,985 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-10-15 16:43:46,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:46,985 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-10-15 16:43:46,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:46,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:46,985 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:47,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-15 16:43:47,195 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:47,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:47,196 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-10-15 16:43:47,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:47,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182835874] [2020-10-15 16:43:47,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:47,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182835874] [2020-10-15 16:43:47,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312809194] [2020-10-15 16:43:47,403 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 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 [2020-10-15 16:43:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:47,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:47,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:47,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:47,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:47,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401545454] [2020-10-15 16:43:47,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:47,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:47,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:47,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:47,517 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-10-15 16:43:48,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:48,086 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-10-15 16:43:48,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:43:48,086 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:48,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:48,087 INFO L225 Difference]: With dead ends: 105 [2020-10-15 16:43:48,087 INFO L226 Difference]: Without dead ends: 99 [2020-10-15 16:43:48,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:43:48,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-15 16:43:48,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-10-15 16:43:48,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:43:48,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 16:43:48,095 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-10-15 16:43:48,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:48,096 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 16:43:48,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:48,096 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 16:43:48,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:48,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:48,096 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:48,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:48,307 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:48,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:48,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-10-15 16:43:48,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:48,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602666822] [2020-10-15 16:43:48,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:48,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:48,504 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:48,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602666822] [2020-10-15 16:43:48,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758046647] [2020-10-15 16:43:48,505 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 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 [2020-10-15 16:43:48,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:48,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:48,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:48,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:48,606 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:48,624 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:48,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:48,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:48,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604792303] [2020-10-15 16:43:48,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:48,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:48,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:48,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:48,626 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-10-15 16:43:49,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:49,307 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-10-15 16:43:49,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:43:49,308 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:49,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:49,309 INFO L225 Difference]: With dead ends: 102 [2020-10-15 16:43:49,309 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 16:43:49,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:43:49,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 16:43:49,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-10-15 16:43:49,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:43:49,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 16:43:49,314 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-10-15 16:43:49,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:49,314 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 16:43:49,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:49,314 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 16:43:49,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:49,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:49,314 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:49,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-15 16:43:49,515 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:49,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:49,516 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-10-15 16:43:49,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:49,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209767335] [2020-10-15 16:43:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:49,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209767335] [2020-10-15 16:43:49,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87207053] [2020-10-15 16:43:49,665 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 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 [2020-10-15 16:43:49,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 16:43:49,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:49,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:49,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:49,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:49,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:49,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654670517] [2020-10-15 16:43:49,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:49,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:49,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:49,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:49,728 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-10-15 16:43:50,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:50,265 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-10-15 16:43:50,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:43:50,266 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:50,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:50,267 INFO L225 Difference]: With dead ends: 103 [2020-10-15 16:43:50,267 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 16:43:50,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:43:50,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 16:43:50,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-10-15 16:43:50,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 16:43:50,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-15 16:43:50,270 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-10-15 16:43:50,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:50,270 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-15 16:43:50,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:50,271 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-15 16:43:50,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:50,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:50,271 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:50,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:50,472 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:50,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:50,472 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-10-15 16:43:50,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:50,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792766389] [2020-10-15 16:43:50,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:50,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792766389] [2020-10-15 16:43:50,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082369142] [2020-10-15 16:43:50,609 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 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 [2020-10-15 16:43:50,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:50,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:50,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:50,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:50,671 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:50,683 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:50,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:50,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:50,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817554013] [2020-10-15 16:43:50,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:50,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:50,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:50,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:50,685 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-15 16:43:51,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:51,380 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-10-15 16:43:51,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:43:51,382 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:51,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:51,383 INFO L225 Difference]: With dead ends: 100 [2020-10-15 16:43:51,383 INFO L226 Difference]: Without dead ends: 94 [2020-10-15 16:43:51,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:43:51,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-15 16:43:51,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-10-15 16:43:51,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 16:43:51,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-15 16:43:51,385 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-10-15 16:43:51,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:51,386 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-15 16:43:51,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:51,386 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-15 16:43:51,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:51,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:51,386 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:51,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-15 16:43:51,587 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:51,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:51,588 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-10-15 16:43:51,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:51,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606991843] [2020-10-15 16:43:51,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:51,703 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:51,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606991843] [2020-10-15 16:43:51,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567147866] [2020-10-15 16:43:51,704 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 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 [2020-10-15 16:43:51,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 16:43:51,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:51,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:51,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:51,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:51,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:51,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487710193] [2020-10-15 16:43:51,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:51,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:51,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:51,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:51,803 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-10-15 16:43:52,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:52,516 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-15 16:43:52,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:43:52,517 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:52,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:52,518 INFO L225 Difference]: With dead ends: 120 [2020-10-15 16:43:52,518 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 16:43:52,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:43:52,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 16:43:52,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-10-15 16:43:52,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 16:43:52,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-10-15 16:43:52,530 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-10-15 16:43:52,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:52,530 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-10-15 16:43:52,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:52,530 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-10-15 16:43:52,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:52,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:52,531 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:52,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-15 16:43:52,732 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:52,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:52,732 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-10-15 16:43:52,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:52,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604310507] [2020-10-15 16:43:52,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:52,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:52,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604310507] [2020-10-15 16:43:52,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433705793] [2020-10-15 16:43:52,859 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 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 [2020-10-15 16:43:52,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 16:43:52,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:52,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:52,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:52,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:52,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:52,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979441474] [2020-10-15 16:43:52,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:52,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:52,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:52,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:52,946 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-10-15 16:43:53,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:53,683 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-10-15 16:43:53,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:43:53,684 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:53,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:53,685 INFO L225 Difference]: With dead ends: 101 [2020-10-15 16:43:53,685 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 16:43:53,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=575, Invalid=1405, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:43:53,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 16:43:53,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-15 16:43:53,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 16:43:53,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-15 16:43:53,688 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-15 16:43:53,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:53,689 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-15 16:43:53,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:53,689 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-15 16:43:53,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:53,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:53,689 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:53,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:53,895 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:53,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:53,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-10-15 16:43:53,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:53,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267146230] [2020-10-15 16:43:53,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:54,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267146230] [2020-10-15 16:43:54,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83010546] [2020-10-15 16:43:54,094 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 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 [2020-10-15 16:43:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:54,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:54,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:54,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:54,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:43:54,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301840426] [2020-10-15 16:43:54,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:54,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:54,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:54,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:54,154 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-15 16:43:54,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:54,529 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-10-15 16:43:54,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:43:54,530 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:43:54,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:54,530 INFO L225 Difference]: With dead ends: 114 [2020-10-15 16:43:54,530 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 16:43:54,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:43:54,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 16:43:54,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-10-15 16:43:54,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:43:54,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:43:54,533 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 16:43:54,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:54,533 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:43:54,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:54,534 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:43:54,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:54,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:54,534 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:54,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:54,739 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:54,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:54,739 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-10-15 16:43:54,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:54,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820317016] [2020-10-15 16:43:54,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:54,939 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:54,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820317016] [2020-10-15 16:43:54,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405640775] [2020-10-15 16:43:54,940 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 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 [2020-10-15 16:43:54,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:54,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:54,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:54,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:55,005 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:55,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:55,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:43:55,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788439654] [2020-10-15 16:43:55,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:55,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:55,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:55,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:55,016 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 16:43:55,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:55,446 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-10-15 16:43:55,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:43:55,447 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:43:55,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:55,447 INFO L225 Difference]: With dead ends: 111 [2020-10-15 16:43:55,448 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 16:43:55,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:43:55,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 16:43:55,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-10-15 16:43:55,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:43:55,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:43:55,450 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 16:43:55,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:55,450 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:43:55,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:55,451 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:43:55,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:55,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:55,451 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:55,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-15 16:43:55,652 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:55,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:55,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-10-15 16:43:55,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:55,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902546054] [2020-10-15 16:43:55,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:55,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:55,834 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:55,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902546054] [2020-10-15 16:43:55,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532134387] [2020-10-15 16:43:55,835 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 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 [2020-10-15 16:43:55,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 16:43:55,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:55,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:55,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:55,893 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:55,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:55,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:43:55,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790080555] [2020-10-15 16:43:55,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:55,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:55,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:55,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:55,895 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 16:43:56,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:56,293 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-15 16:43:56,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:43:56,294 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:43:56,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:56,294 INFO L225 Difference]: With dead ends: 108 [2020-10-15 16:43:56,294 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 16:43:56,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 16:43:56,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 16:43:56,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-10-15 16:43:56,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:43:56,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:43:56,297 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 16:43:56,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:56,297 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:43:56,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:56,298 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:43:56,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:56,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:56,298 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:56,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:56,503 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:56,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:56,504 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-10-15 16:43:56,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:56,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18377348] [2020-10-15 16:43:56,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:56,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:56,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18377348] [2020-10-15 16:43:56,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275531074] [2020-10-15 16:43:56,692 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 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 [2020-10-15 16:43:56,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:56,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:56,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:56,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:56,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:56,768 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:56,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:56,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:43:56,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888549948] [2020-10-15 16:43:56,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:56,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:56,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:56,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:56,770 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 16:43:57,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:57,251 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-10-15 16:43:57,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:43:57,252 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:43:57,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:57,252 INFO L225 Difference]: With dead ends: 107 [2020-10-15 16:43:57,252 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 16:43:57,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:43:57,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 16:43:57,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-10-15 16:43:57,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:43:57,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:43:57,255 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 16:43:57,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:57,256 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:43:57,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:57,256 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:43:57,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:57,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:57,257 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:57,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-10-15 16:43:57,466 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:57,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:57,466 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-10-15 16:43:57,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:57,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504302551] [2020-10-15 16:43:57,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:57,644 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:57,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504302551] [2020-10-15 16:43:57,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127958358] [2020-10-15 16:43:57,645 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 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 [2020-10-15 16:43:57,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 16:43:57,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:57,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:57,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:57,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:57,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:43:57,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154604215] [2020-10-15 16:43:57,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:57,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:57,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:57,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:57,705 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 16:43:58,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:58,167 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-15 16:43:58,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:43:58,167 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:43:58,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:58,168 INFO L225 Difference]: With dead ends: 104 [2020-10-15 16:43:58,168 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 16:43:58,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:43:58,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 16:43:58,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-10-15 16:43:58,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:43:58,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:43:58,171 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 16:43:58,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:58,172 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:43:58,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:58,172 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:43:58,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:58,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:58,173 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:58,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-15 16:43:58,375 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:58,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:58,375 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-10-15 16:43:58,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:58,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644537558] [2020-10-15 16:43:58,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:58,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644537558] [2020-10-15 16:43:58,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45853619] [2020-10-15 16:43:58,550 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 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 [2020-10-15 16:43:58,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 16:43:58,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:58,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:58,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:58,624 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:58,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:58,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:43:58,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331732998] [2020-10-15 16:43:58,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:58,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:58,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:58,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:58,637 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 16:43:59,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:59,248 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-15 16:43:59,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:43:59,249 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:43:59,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:59,249 INFO L225 Difference]: With dead ends: 103 [2020-10-15 16:43:59,249 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 16:43:59,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:43:59,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 16:43:59,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-10-15 16:43:59,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:43:59,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:43:59,253 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 16:43:59,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:59,253 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:43:59,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:59,253 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:43:59,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:59,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:59,254 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:59,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-10-15 16:43:59,459 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:59,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:59,459 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-10-15 16:43:59,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:59,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679152054] [2020-10-15 16:43:59,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:59,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679152054] [2020-10-15 16:43:59,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105584461] [2020-10-15 16:43:59,628 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 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 [2020-10-15 16:43:59,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:59,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:59,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:59,685 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:59,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:59,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:43:59,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242459610] [2020-10-15 16:43:59,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:59,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:59,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:59,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:59,687 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 16:44:00,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:00,197 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-10-15 16:44:00,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:44:00,198 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:44:00,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:00,199 INFO L225 Difference]: With dead ends: 100 [2020-10-15 16:44:00,199 INFO L226 Difference]: Without dead ends: 94 [2020-10-15 16:44:00,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:44:00,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-15 16:44:00,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-10-15 16:44:00,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:44:00,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:44:00,201 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 16:44:00,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:00,202 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:44:00,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:44:00,202 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:44:00,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:44:00,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:00,202 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:00,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:00,410 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:00,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:00,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-10-15 16:44:00,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:00,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457978721] [2020-10-15 16:44:00,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:00,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457978721] [2020-10-15 16:44:00,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308360185] [2020-10-15 16:44:00,578 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 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 [2020-10-15 16:44:00,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:00,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:00,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:44:00,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:00,645 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:00,659 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:00,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:00,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:44:00,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859978108] [2020-10-15 16:44:00,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:00,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:00,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:00,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:00,660 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 16:44:01,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:01,327 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-15 16:44:01,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:44:01,328 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:44:01,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:01,328 INFO L225 Difference]: With dead ends: 99 [2020-10-15 16:44:01,329 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 16:44:01,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:44:01,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 16:44:01,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-10-15 16:44:01,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:44:01,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:44:01,331 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 16:44:01,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:01,331 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:44:01,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:01,331 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:44:01,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:44:01,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:01,332 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:01,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-10-15 16:44:01,532 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:01,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:01,533 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-10-15 16:44:01,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:01,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047558426] [2020-10-15 16:44:01,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:01,690 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:01,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047558426] [2020-10-15 16:44:01,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178440888] [2020-10-15 16:44:01,691 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 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 [2020-10-15 16:44:01,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 16:44:01,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:01,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:44:01,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:01,752 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:01,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:01,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:44:01,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170768039] [2020-10-15 16:44:01,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:44:01,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:01,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:44:01,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:44:01,754 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 16:44:02,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:02,312 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-15 16:44:02,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:44:02,313 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:44:02,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:02,314 INFO L225 Difference]: With dead ends: 96 [2020-10-15 16:44:02,314 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 16:44:02,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:44:02,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 16:44:02,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-10-15 16:44:02,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:44:02,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:44:02,317 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 16:44:02,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:02,317 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:44:02,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:44:02,317 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:44:02,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:44:02,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:02,318 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:02,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:02,525 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:02,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:02,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-10-15 16:44:02,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:02,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403158790] [2020-10-15 16:44:02,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:02,685 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:02,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403158790] [2020-10-15 16:44:02,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662328052] [2020-10-15 16:44:02,685 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 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 [2020-10-15 16:44:02,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:02,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:02,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:44:02,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:02,766 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:02,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:02,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:44:02,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102826772] [2020-10-15 16:44:02,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:02,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:02,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:02,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:02,780 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 16:44:03,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:03,514 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-15 16:44:03,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:44:03,515 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:44:03,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:03,516 INFO L225 Difference]: With dead ends: 95 [2020-10-15 16:44:03,516 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 16:44:03,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:44:03,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 16:44:03,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-10-15 16:44:03,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:44:03,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:44:03,519 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 16:44:03,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:03,519 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:44:03,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:03,519 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:44:03,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:44:03,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:03,520 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:03,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:03,722 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:03,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:03,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-10-15 16:44:03,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:03,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568161564] [2020-10-15 16:44:03,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:03,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568161564] [2020-10-15 16:44:03,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743936977] [2020-10-15 16:44:03,888 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 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 [2020-10-15 16:44:03,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 16:44:03,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:03,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:44:03,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:03,996 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:03,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:03,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:44:03,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585678299] [2020-10-15 16:44:03,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:44:03,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:03,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:44:03,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:44:03,998 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 16:44:04,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:04,642 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-15 16:44:04,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:44:04,642 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:44:04,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:04,643 INFO L225 Difference]: With dead ends: 92 [2020-10-15 16:44:04,643 INFO L226 Difference]: Without dead ends: 86 [2020-10-15 16:44:04,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:44:04,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-15 16:44:04,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-10-15 16:44:04,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:44:04,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:44:04,646 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 16:44:04,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:04,646 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:44:04,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:44:04,647 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:44:04,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:44:04,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:04,647 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:04,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:04,856 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:04,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:04,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-10-15 16:44:04,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:04,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616206516] [2020-10-15 16:44:04,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:05,008 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:05,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616206516] [2020-10-15 16:44:05,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510864923] [2020-10-15 16:44:05,009 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 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 [2020-10-15 16:44:05,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 16:44:05,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:05,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:44:05,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:05,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:05,092 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:05,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:05,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:44:05,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014344481] [2020-10-15 16:44:05,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:05,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:05,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:05,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:05,093 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 16:44:05,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:05,926 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-10-15 16:44:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:44:05,927 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:44:05,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:05,927 INFO L225 Difference]: With dead ends: 91 [2020-10-15 16:44:05,927 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 16:44:05,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 16:44:05,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 16:44:05,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-10-15 16:44:05,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:44:05,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:44:05,932 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 16:44:05,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:05,932 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:44:05,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:05,932 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:44:05,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:44:05,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:05,933 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:06,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:06,141 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:06,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:06,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-10-15 16:44:06,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:06,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555464407] [2020-10-15 16:44:06,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:06,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:06,304 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:06,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555464407] [2020-10-15 16:44:06,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667290069] [2020-10-15 16:44:06,305 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 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 [2020-10-15 16:44:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:06,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:44:06,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:06,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:06,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:44:06,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038378470] [2020-10-15 16:44:06,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:44:06,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:06,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:44:06,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:44:06,373 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 16:44:07,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:07,035 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-15 16:44:07,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:44:07,036 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:44:07,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:07,036 INFO L225 Difference]: With dead ends: 107 [2020-10-15 16:44:07,036 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 16:44:07,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:44:07,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 16:44:07,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-10-15 16:44:07,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 16:44:07,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-10-15 16:44:07,041 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-10-15 16:44:07,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:07,041 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-10-15 16:44:07,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:44:07,042 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-10-15 16:44:07,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:44:07,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:07,042 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:07,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-15 16:44:07,243 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:07,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:07,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-10-15 16:44:07,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:07,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951642773] [2020-10-15 16:44:07,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:07,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:07,401 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:07,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951642773] [2020-10-15 16:44:07,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388772649] [2020-10-15 16:44:07,402 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 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 [2020-10-15 16:44:07,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:07,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:07,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:44:07,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:07,478 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:07,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:07,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:44:07,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514698939] [2020-10-15 16:44:07,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:07,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:07,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:07,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:07,494 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-10-15 16:44:08,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:08,354 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-10-15 16:44:08,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:44:08,355 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:44:08,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:08,356 INFO L225 Difference]: With dead ends: 88 [2020-10-15 16:44:08,356 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 16:44:08,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:44:08,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 16:44:08,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-10-15 16:44:08,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 16:44:08,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-10-15 16:44:08,358 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-10-15 16:44:08,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:08,359 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-10-15 16:44:08,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:08,359 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-10-15 16:44:08,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:44:08,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:08,359 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:08,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-10-15 16:44:08,560 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:08,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:08,561 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-10-15 16:44:08,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:08,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070871878] [2020-10-15 16:44:08,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:08,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070871878] [2020-10-15 16:44:08,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577608115] [2020-10-15 16:44:08,712 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 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 [2020-10-15 16:44:08,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 16:44:08,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:08,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:44:08,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:08,781 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:44:08,798 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:08,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:08,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:44:08,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833810936] [2020-10-15 16:44:08,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:08,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:08,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:08,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:08,800 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-10-15 16:44:09,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:09,588 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-10-15 16:44:09,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:44:09,588 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:44:09,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:09,589 INFO L225 Difference]: With dead ends: 100 [2020-10-15 16:44:09,589 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 16:44:09,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:44:09,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 16:44:09,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-10-15 16:44:09,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 16:44:09,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-15 16:44:09,592 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-10-15 16:44:09,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:09,592 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-15 16:44:09,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:09,592 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-15 16:44:09,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:09,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:09,592 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:09,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-15 16:44:09,793 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:09,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:09,794 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-10-15 16:44:09,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:09,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134976885] [2020-10-15 16:44:09,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:09,955 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:09,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134976885] [2020-10-15 16:44:09,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133742552] [2020-10-15 16:44:09,955 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 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 [2020-10-15 16:44:10,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:10,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:10,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:10,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:10,027 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:44:10,044 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:10,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:10,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:44:10,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286570808] [2020-10-15 16:44:10,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:10,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:10,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:10,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:10,046 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-10-15 16:44:10,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:10,913 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-10-15 16:44:10,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:44:10,913 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:44:10,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:10,914 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:44:10,914 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 16:44:10,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:44:10,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 16:44:10,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-10-15 16:44:10,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 16:44:10,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-15 16:44:10,917 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-10-15 16:44:10,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:10,917 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-15 16:44:10,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:10,917 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-15 16:44:10,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:10,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:10,918 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:11,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-15 16:44:11,123 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:11,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:11,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-10-15 16:44:11,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:11,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124456880] [2020-10-15 16:44:11,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:11,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124456880] [2020-10-15 16:44:11,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126741504] [2020-10-15 16:44:11,340 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 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 [2020-10-15 16:44:11,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 16:44:11,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:11,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:11,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:11,413 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:11,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:11,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:44:11,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718509651] [2020-10-15 16:44:11,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:11,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:11,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:11,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:11,414 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-10-15 16:44:11,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:11,770 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-10-15 16:44:11,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:44:11,773 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:44:11,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:11,773 INFO L225 Difference]: With dead ends: 90 [2020-10-15 16:44:11,773 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 16:44:11,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:44:11,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 16:44:11,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-10-15 16:44:11,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 16:44:11,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-10-15 16:44:11,775 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-10-15 16:44:11,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:11,775 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-10-15 16:44:11,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:11,775 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-10-15 16:44:11,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:11,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:11,776 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:11,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:11,984 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:11,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:11,985 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-10-15 16:44:11,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:11,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845323728] [2020-10-15 16:44:11,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:12,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845323728] [2020-10-15 16:44:12,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387186151] [2020-10-15 16:44:12,211 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 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 [2020-10-15 16:44:12,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 16:44:12,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:12,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:12,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:12,282 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:12,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:12,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:44:12,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844257602] [2020-10-15 16:44:12,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:12,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:12,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:12,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:12,294 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-10-15 16:44:12,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:12,709 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-10-15 16:44:12,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:44:12,709 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:44:12,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:12,710 INFO L225 Difference]: With dead ends: 106 [2020-10-15 16:44:12,711 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 16:44:12,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:44:12,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 16:44:12,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-15 16:44:12,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 16:44:12,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-10-15 16:44:12,714 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-10-15 16:44:12,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:12,714 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-10-15 16:44:12,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:12,715 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-10-15 16:44:12,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:12,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:12,715 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:12,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-10-15 16:44:12,919 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:12,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:12,920 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-10-15 16:44:12,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:12,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134469492] [2020-10-15 16:44:12,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:13,146 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:13,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134469492] [2020-10-15 16:44:13,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115851944] [2020-10-15 16:44:13,147 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 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 [2020-10-15 16:44:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:13,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:13,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:13,204 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:13,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:13,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:44:13,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687049748] [2020-10-15 16:44:13,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:13,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:13,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:13,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:13,205 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-10-15 16:44:13,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:13,671 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-10-15 16:44:13,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:44:13,672 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:44:13,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:13,673 INFO L225 Difference]: With dead ends: 107 [2020-10-15 16:44:13,673 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 16:44:13,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:44:13,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 16:44:13,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-15 16:44:13,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 16:44:13,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-10-15 16:44:13,675 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-10-15 16:44:13,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:13,676 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-10-15 16:44:13,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:13,676 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-10-15 16:44:13,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:13,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:13,676 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:13,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-15 16:44:13,884 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:13,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:13,884 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-10-15 16:44:13,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:13,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010101195] [2020-10-15 16:44:13,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:14,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010101195] [2020-10-15 16:44:14,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161139894] [2020-10-15 16:44:14,095 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 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 [2020-10-15 16:44:14,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:14,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:14,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:14,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:14,162 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:14,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:14,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:44:14,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592394046] [2020-10-15 16:44:14,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:14,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:14,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:14,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:14,173 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-10-15 16:44:14,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:14,660 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-10-15 16:44:14,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:44:14,660 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:44:14,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:14,661 INFO L225 Difference]: With dead ends: 119 [2020-10-15 16:44:14,661 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 16:44:14,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:44:14,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 16:44:14,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-10-15 16:44:14,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 16:44:14,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-10-15 16:44:14,663 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-10-15 16:44:14,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:14,663 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-10-15 16:44:14,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:14,663 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-10-15 16:44:14,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:14,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:14,663 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:14,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-10-15 16:44:14,864 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:14,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:14,865 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-10-15 16:44:14,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:14,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333048265] [2020-10-15 16:44:14,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:14,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:15,068 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:15,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333048265] [2020-10-15 16:44:15,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194805981] [2020-10-15 16:44:15,069 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 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 [2020-10-15 16:44:15,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 16:44:15,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:15,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:15,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:15,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:15,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:44:15,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198731877] [2020-10-15 16:44:15,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:15,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:15,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:15,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:15,140 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-10-15 16:44:15,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:15,645 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-10-15 16:44:15,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:44:15,646 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:44:15,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:15,646 INFO L225 Difference]: With dead ends: 119 [2020-10-15 16:44:15,646 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 16:44:15,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:44:15,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 16:44:15,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-10-15 16:44:15,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:44:15,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-10-15 16:44:15,650 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-10-15 16:44:15,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:15,650 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-10-15 16:44:15,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:15,650 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-10-15 16:44:15,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:15,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:15,651 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:15,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:15,859 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:15,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:15,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-10-15 16:44:15,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:15,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902317185] [2020-10-15 16:44:15,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:16,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902317185] [2020-10-15 16:44:16,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010136706] [2020-10-15 16:44:16,062 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 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 [2020-10-15 16:44:16,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:16,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:16,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:16,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:16,129 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:16,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:16,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:44:16,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356702125] [2020-10-15 16:44:16,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:16,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:16,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:16,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:16,141 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-10-15 16:44:16,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:16,729 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-10-15 16:44:16,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:44:16,729 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:44:16,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:16,730 INFO L225 Difference]: With dead ends: 116 [2020-10-15 16:44:16,730 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 16:44:16,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:44:16,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 16:44:16,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-10-15 16:44:16,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:44:16,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-10-15 16:44:16,731 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-10-15 16:44:16,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:16,732 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-10-15 16:44:16,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:16,732 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-10-15 16:44:16,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:16,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:16,732 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:16,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:16,933 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:16,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:16,934 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-10-15 16:44:16,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:16,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708636618] [2020-10-15 16:44:16,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:17,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708636618] [2020-10-15 16:44:17,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479364155] [2020-10-15 16:44:17,160 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 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 [2020-10-15 16:44:17,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 16:44:17,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:17,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:17,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:17,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:17,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:44:17,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69884722] [2020-10-15 16:44:17,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:17,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:17,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:17,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:17,262 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-10-15 16:44:17,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:17,866 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-10-15 16:44:17,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:44:17,868 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:44:17,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:17,869 INFO L225 Difference]: With dead ends: 117 [2020-10-15 16:44:17,869 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 16:44:17,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:44:17,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 16:44:17,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-10-15 16:44:17,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 16:44:17,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-10-15 16:44:17,872 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-10-15 16:44:17,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:17,873 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-10-15 16:44:17,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:17,873 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-10-15 16:44:17,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:17,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:17,874 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:18,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:18,083 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:18,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:18,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-10-15 16:44:18,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:18,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44821127] [2020-10-15 16:44:18,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:18,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:18,329 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:18,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44821127] [2020-10-15 16:44:18,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838028981] [2020-10-15 16:44:18,330 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 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 [2020-10-15 16:44:18,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 16:44:18,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:18,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:18,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:18,405 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:18,417 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:18,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:18,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:44:18,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291207219] [2020-10-15 16:44:18,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:18,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:18,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:18,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:18,418 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-10-15 16:44:19,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:19,059 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-10-15 16:44:19,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:44:19,060 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:44:19,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:19,060 INFO L225 Difference]: With dead ends: 114 [2020-10-15 16:44:19,060 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 16:44:19,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:44:19,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 16:44:19,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-10-15 16:44:19,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 16:44:19,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-15 16:44:19,068 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-10-15 16:44:19,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:19,069 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-15 16:44:19,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:19,069 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-15 16:44:19,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:19,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:19,069 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:19,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-15 16:44:19,277 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:19,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:19,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-10-15 16:44:19,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:19,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058485441] [2020-10-15 16:44:19,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:19,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:19,457 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:19,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058485441] [2020-10-15 16:44:19,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409883134] [2020-10-15 16:44:19,458 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 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 [2020-10-15 16:44:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:19,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:19,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:19,524 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:19,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:19,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:44:19,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800508045] [2020-10-15 16:44:19,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:19,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:19,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:19,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:19,526 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-10-15 16:44:20,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:20,131 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-10-15 16:44:20,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:44:20,132 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:44:20,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:20,132 INFO L225 Difference]: With dead ends: 115 [2020-10-15 16:44:20,132 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 16:44:20,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:44:20,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 16:44:20,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-10-15 16:44:20,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 16:44:20,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-10-15 16:44:20,136 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-10-15 16:44:20,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:20,136 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-10-15 16:44:20,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:20,137 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-10-15 16:44:20,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:20,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:20,137 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:20,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:20,346 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:20,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:20,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-10-15 16:44:20,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:20,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415112126] [2020-10-15 16:44:20,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:20,532 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:20,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415112126] [2020-10-15 16:44:20,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615297855] [2020-10-15 16:44:20,533 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 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 [2020-10-15 16:44:20,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:20,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:20,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:20,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:20,603 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:20,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:20,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:44:20,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529089186] [2020-10-15 16:44:20,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:20,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:20,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:20,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:20,617 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-10-15 16:44:21,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:21,352 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-10-15 16:44:21,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:44:21,352 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:44:21,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:21,353 INFO L225 Difference]: With dead ends: 112 [2020-10-15 16:44:21,353 INFO L226 Difference]: Without dead ends: 106 [2020-10-15 16:44:21,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:44:21,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-15 16:44:21,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-10-15 16:44:21,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 16:44:21,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-10-15 16:44:21,355 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-10-15 16:44:21,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:21,355 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-10-15 16:44:21,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:21,356 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-10-15 16:44:21,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:21,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:21,356 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:21,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-15 16:44:21,565 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:21,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:21,565 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-10-15 16:44:21,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:21,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607359674] [2020-10-15 16:44:21,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:21,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607359674] [2020-10-15 16:44:21,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226670200] [2020-10-15 16:44:21,742 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 [2020-10-15 16:44:21,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 16:44:21,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:21,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:21,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:21,818 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:21,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:21,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:44:21,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548684249] [2020-10-15 16:44:21,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:21,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:21,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:21,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:21,819 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-10-15 16:44:22,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:22,472 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-10-15 16:44:22,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:44:22,473 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:44:22,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:22,474 INFO L225 Difference]: With dead ends: 113 [2020-10-15 16:44:22,474 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 16:44:22,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 16:44:22,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 16:44:22,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-10-15 16:44:22,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:44:22,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:44:22,476 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-10-15 16:44:22,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:22,477 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:44:22,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:22,477 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:44:22,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:22,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:22,477 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:22,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-15 16:44:22,678 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:22,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:22,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-10-15 16:44:22,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:22,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132784873] [2020-10-15 16:44:22,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:22,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:22,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132784873] [2020-10-15 16:44:22,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994075424] [2020-10-15 16:44:22,857 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 [2020-10-15 16:44:22,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:22,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:22,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:22,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:22,923 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:22,936 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:22,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:22,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:44:22,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231959188] [2020-10-15 16:44:22,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:22,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:22,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:22,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:22,938 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-10-15 16:44:23,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:23,753 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-10-15 16:44:23,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:44:23,754 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:44:23,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:23,754 INFO L225 Difference]: With dead ends: 110 [2020-10-15 16:44:23,754 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 16:44:23,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 16:44:23,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 16:44:23,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-10-15 16:44:23,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:44:23,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:44:23,756 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-10-15 16:44:23,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:23,756 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:44:23,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:23,757 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:44:23,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:23,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:23,757 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:23,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-10-15 16:44:23,958 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:23,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:23,958 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-10-15 16:44:23,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:23,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377340514] [2020-10-15 16:44:23,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:24,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377340514] [2020-10-15 16:44:24,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327860635] [2020-10-15 16:44:24,132 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 [2020-10-15 16:44:24,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 16:44:24,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:24,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:24,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:24,206 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:24,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:24,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:44:24,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71711693] [2020-10-15 16:44:24,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:24,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:24,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:24,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:24,207 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-10-15 16:44:24,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:24,994 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-15 16:44:24,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:44:24,995 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:44:24,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:24,996 INFO L225 Difference]: With dead ends: 111 [2020-10-15 16:44:24,996 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 16:44:24,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:44:24,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 16:44:24,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-10-15 16:44:24,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 16:44:24,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-15 16:44:24,998 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-10-15 16:44:24,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:24,999 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-15 16:44:24,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:24,999 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-15 16:44:24,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:24,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:24,999 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:25,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:25,200 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:25,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:25,200 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-10-15 16:44:25,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:25,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786141735] [2020-10-15 16:44:25,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:25,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:25,371 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:25,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786141735] [2020-10-15 16:44:25,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720887247] [2020-10-15 16:44:25,372 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 [2020-10-15 16:44:25,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 16:44:25,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:25,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:25,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:25,440 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:25,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:25,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:44:25,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277497634] [2020-10-15 16:44:25,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:25,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:25,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:25,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:25,455 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-15 16:44:26,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:26,349 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-10-15 16:44:26,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:44:26,349 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:44:26,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:26,350 INFO L225 Difference]: With dead ends: 108 [2020-10-15 16:44:26,350 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 16:44:26,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:44:26,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 16:44:26,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-10-15 16:44:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 16:44:26,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-15 16:44:26,353 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-10-15 16:44:26,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:26,354 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-15 16:44:26,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:26,354 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-15 16:44:26,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:26,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:26,355 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:26,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-15 16:44:26,563 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:26,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:26,563 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-10-15 16:44:26,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:26,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079075382] [2020-10-15 16:44:26,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:26,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079075382] [2020-10-15 16:44:26,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671587491] [2020-10-15 16:44:26,734 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 [2020-10-15 16:44:26,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:26,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:26,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:26,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:26,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:44:26,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746727445] [2020-10-15 16:44:26,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:26,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:26,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:26,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:26,803 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-10-15 16:44:27,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:27,561 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-10-15 16:44:27,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:44:27,562 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:44:27,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:27,563 INFO L225 Difference]: With dead ends: 128 [2020-10-15 16:44:27,563 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 16:44:27,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 16:44:27,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 16:44:27,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-10-15 16:44:27,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:44:27,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-10-15 16:44:27,565 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-10-15 16:44:27,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:27,565 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-10-15 16:44:27,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:27,565 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-10-15 16:44:27,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:27,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:27,565 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:27,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:27,766 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:27,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:27,767 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-10-15 16:44:27,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:27,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200768644] [2020-10-15 16:44:27,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:27,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200768644] [2020-10-15 16:44:27,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492141609] [2020-10-15 16:44:27,936 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 [2020-10-15 16:44:27,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:27,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:27,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:27,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:28,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:28,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:44:28,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028547448] [2020-10-15 16:44:28,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:28,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:28,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:28,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:28,020 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-10-15 16:44:28,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:28,926 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-10-15 16:44:28,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:44:28,927 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:44:28,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:28,927 INFO L225 Difference]: With dead ends: 109 [2020-10-15 16:44:28,927 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 16:44:28,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=733, Invalid=1817, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 16:44:28,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 16:44:28,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-10-15 16:44:28,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 16:44:28,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-15 16:44:28,930 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-15 16:44:28,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:28,930 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-15 16:44:28,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:28,930 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-15 16:44:28,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:28,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:28,930 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:29,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:29,131 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:29,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:29,132 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-10-15 16:44:29,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:29,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905775847] [2020-10-15 16:44:29,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:29,389 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:29,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905775847] [2020-10-15 16:44:29,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633798744] [2020-10-15 16:44:29,390 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 [2020-10-15 16:44:29,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 16:44:29,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:29,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:29,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:29,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:29,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:29,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029647753] [2020-10-15 16:44:29,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:29,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:29,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:29,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:29,456 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-15 16:44:29,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:29,895 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-10-15 16:44:29,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:44:29,896 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:29,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:29,896 INFO L225 Difference]: With dead ends: 124 [2020-10-15 16:44:29,896 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 16:44:29,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:44:29,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 16:44:29,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-10-15 16:44:29,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:29,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:29,899 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:29,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:29,899 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:29,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:29,899 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:29,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:29,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:29,899 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:30,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:30,106 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:30,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:30,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-10-15 16:44:30,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:30,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723717002] [2020-10-15 16:44:30,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:30,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:30,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723717002] [2020-10-15 16:44:30,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287800975] [2020-10-15 16:44:30,369 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 [2020-10-15 16:44:30,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:30,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:30,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:30,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:30,437 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:30,450 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:30,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:30,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:30,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365939816] [2020-10-15 16:44:30,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:30,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:30,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:30,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:30,451 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:31,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:31,003 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-15 16:44:31,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:44:31,004 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:31,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:31,004 INFO L225 Difference]: With dead ends: 121 [2020-10-15 16:44:31,004 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 16:44:31,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:44:31,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 16:44:31,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-10-15 16:44:31,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:31,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:31,007 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:31,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:31,007 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:31,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:31,008 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:31,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:31,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:31,008 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:31,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:31,209 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:31,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:31,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-10-15 16:44:31,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:31,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976508611] [2020-10-15 16:44:31,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:31,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:31,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976508611] [2020-10-15 16:44:31,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119529284] [2020-10-15 16:44:31,450 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 [2020-10-15 16:44:31,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 16:44:31,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:31,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:31,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:31,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:31,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:31,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027571677] [2020-10-15 16:44:31,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:31,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:31,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:31,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:31,518 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:32,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:32,015 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-15 16:44:32,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:44:32,015 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:32,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:32,015 INFO L225 Difference]: With dead ends: 118 [2020-10-15 16:44:32,016 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 16:44:32,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:44:32,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 16:44:32,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-10-15 16:44:32,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:32,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:32,018 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:32,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:32,018 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:32,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:32,018 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:32,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:32,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:32,019 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:32,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:32,219 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:32,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:32,220 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-10-15 16:44:32,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:32,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745621634] [2020-10-15 16:44:32,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:32,460 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:32,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745621634] [2020-10-15 16:44:32,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526559611] [2020-10-15 16:44:32,461 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 [2020-10-15 16:44:32,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 16:44:32,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:32,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:32,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:32,533 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:32,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:32,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:32,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254925011] [2020-10-15 16:44:32,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:32,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:32,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:32,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:32,545 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:33,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:33,136 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-10-15 16:44:33,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:44:33,137 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:33,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:33,138 INFO L225 Difference]: With dead ends: 117 [2020-10-15 16:44:33,138 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 16:44:33,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:44:33,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 16:44:33,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-10-15 16:44:33,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:33,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:33,141 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:33,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:33,141 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:33,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:33,141 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:33,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:33,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:33,141 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:33,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-15 16:44:33,342 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:33,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:33,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-10-15 16:44:33,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:33,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858819682] [2020-10-15 16:44:33,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:33,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:33,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858819682] [2020-10-15 16:44:33,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137964839] [2020-10-15 16:44:33,566 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 [2020-10-15 16:44:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:33,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:33,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:33,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:33,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:33,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142084373] [2020-10-15 16:44:33,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:33,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:33,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:33,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:33,631 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:34,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:34,187 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-10-15 16:44:34,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:44:34,188 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:34,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:34,189 INFO L225 Difference]: With dead ends: 114 [2020-10-15 16:44:34,189 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 16:44:34,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:44:34,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 16:44:34,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-10-15 16:44:34,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:34,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:34,191 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:34,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:34,191 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:34,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:34,192 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:34,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:34,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:34,192 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:34,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-15 16:44:34,395 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:34,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:34,395 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-10-15 16:44:34,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:34,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942730693] [2020-10-15 16:44:34,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:34,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942730693] [2020-10-15 16:44:34,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127849299] [2020-10-15 16:44:34,623 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 [2020-10-15 16:44:34,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:34,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:34,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:34,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:34,689 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:34,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:34,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:34,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466398613] [2020-10-15 16:44:34,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:34,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:34,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:34,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:34,703 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:35,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:35,394 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-15 16:44:35,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:44:35,395 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:35,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:35,396 INFO L225 Difference]: With dead ends: 113 [2020-10-15 16:44:35,396 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 16:44:35,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:44:35,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 16:44:35,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-10-15 16:44:35,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:35,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:35,399 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:35,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:35,399 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:35,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:35,399 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:35,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:35,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:35,400 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:35,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-15 16:44:35,608 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:35,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:35,609 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-10-15 16:44:35,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:35,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297582401] [2020-10-15 16:44:35,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:35,823 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:35,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297582401] [2020-10-15 16:44:35,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701689704] [2020-10-15 16:44:35,824 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 [2020-10-15 16:44:35,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 16:44:35,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:35,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:35,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:35,895 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:35,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:35,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:35,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902347245] [2020-10-15 16:44:35,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:35,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:35,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:35,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:35,896 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:36,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:36,509 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-10-15 16:44:36,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:44:36,510 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:36,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:36,511 INFO L225 Difference]: With dead ends: 110 [2020-10-15 16:44:36,511 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 16:44:36,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:44:36,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 16:44:36,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-15 16:44:36,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:36,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:36,514 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:36,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:36,514 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:36,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:36,514 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:36,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:36,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:36,514 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:36,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-15 16:44:36,715 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:36,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:36,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-10-15 16:44:36,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:36,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316457471] [2020-10-15 16:44:36,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:36,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316457471] [2020-10-15 16:44:36,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000325809] [2020-10-15 16:44:36,937 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 [2020-10-15 16:44:36,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:36,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:36,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:36,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:37,004 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:37,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:37,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:37,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551757084] [2020-10-15 16:44:37,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:37,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:37,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:37,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:37,019 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:37,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:37,814 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-10-15 16:44:37,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:44:37,815 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:37,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:37,816 INFO L225 Difference]: With dead ends: 109 [2020-10-15 16:44:37,816 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 16:44:37,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 16:44:37,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 16:44:37,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-10-15 16:44:37,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:37,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:37,818 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:37,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:37,819 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:37,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:37,819 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:37,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:37,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:37,819 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:38,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:38,020 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:38,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:38,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-10-15 16:44:38,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:38,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030654285] [2020-10-15 16:44:38,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:38,223 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:38,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030654285] [2020-10-15 16:44:38,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480298076] [2020-10-15 16:44:38,224 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 [2020-10-15 16:44:38,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 16:44:38,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:38,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:38,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:38,292 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:38,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:38,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:38,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429133137] [2020-10-15 16:44:38,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:38,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:38,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:38,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:38,294 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:38,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:38,970 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-10-15 16:44:38,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:44:38,971 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:38,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:38,972 INFO L225 Difference]: With dead ends: 106 [2020-10-15 16:44:38,972 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 16:44:38,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:44:38,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 16:44:38,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-10-15 16:44:38,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:38,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:38,974 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:38,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:38,974 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:38,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:38,975 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:38,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:38,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:38,975 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:39,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-10-15 16:44:39,176 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:39,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:39,176 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-10-15 16:44:39,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:39,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385881131] [2020-10-15 16:44:39,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:39,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385881131] [2020-10-15 16:44:39,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429227445] [2020-10-15 16:44:39,385 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 [2020-10-15 16:44:39,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 16:44:39,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:39,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:39,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:39,457 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:39,471 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:39,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:39,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:39,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797312845] [2020-10-15 16:44:39,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:39,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:39,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:39,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:39,473 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:40,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:40,357 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-10-15 16:44:40,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:44:40,357 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:40,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:40,358 INFO L225 Difference]: With dead ends: 105 [2020-10-15 16:44:40,358 INFO L226 Difference]: Without dead ends: 99 [2020-10-15 16:44:40,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:44:40,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-15 16:44:40,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-10-15 16:44:40,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:40,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:40,361 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:40,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:40,361 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:40,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:40,361 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:40,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:40,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:40,361 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:40,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:40,562 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:40,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:40,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-10-15 16:44:40,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:40,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237669718] [2020-10-15 16:44:40,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:40,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237669718] [2020-10-15 16:44:40,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304533905] [2020-10-15 16:44:40,764 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 [2020-10-15 16:44:40,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:40,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:40,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:40,836 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:40,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:40,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:40,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177522866] [2020-10-15 16:44:40,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:40,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:40,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:40,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:40,837 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:41,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:41,586 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-10-15 16:44:41,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:44:41,587 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:41,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:41,588 INFO L225 Difference]: With dead ends: 102 [2020-10-15 16:44:41,588 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 16:44:41,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 16:44:41,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 16:44:41,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-10-15 16:44:41,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:41,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:41,590 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:41,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:41,590 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:41,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:41,590 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:41,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:41,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:41,590 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:41,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:41,791 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:41,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:41,792 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-10-15 16:44:41,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:41,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898649945] [2020-10-15 16:44:41,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:41,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898649945] [2020-10-15 16:44:41,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892159711] [2020-10-15 16:44:41,998 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 [2020-10-15 16:44:42,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:42,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:42,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:42,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:42,067 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:42,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:42,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:42,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668280946] [2020-10-15 16:44:42,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:42,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:42,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:42,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:42,084 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:43,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:43,064 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-15 16:44:43,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:44:43,064 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:43,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:43,064 INFO L225 Difference]: With dead ends: 101 [2020-10-15 16:44:43,065 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 16:44:43,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 16:44:43,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 16:44:43,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-10-15 16:44:43,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:43,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:43,067 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:43,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:43,067 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:43,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:43,068 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:43,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:43,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:43,068 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:43,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-10-15 16:44:43,272 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:43,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:43,272 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-10-15 16:44:43,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:43,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428340383] [2020-10-15 16:44:43,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:43,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:43,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428340383] [2020-10-15 16:44:43,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180659297] [2020-10-15 16:44:43,466 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 [2020-10-15 16:44:43,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 16:44:43,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:43,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:43,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:43,549 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:43,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:43,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:43,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891524262] [2020-10-15 16:44:43,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:43,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:43,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:43,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:43,551 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:44,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:44,361 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-10-15 16:44:44,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:44:44,362 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:44,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:44,362 INFO L225 Difference]: With dead ends: 98 [2020-10-15 16:44:44,362 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 16:44:44,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:44:44,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 16:44:44,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-10-15 16:44:44,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:44,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:44,365 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:44,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:44,365 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:44,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:44,365 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:44,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:44,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:44,366 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:44,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:44,566 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:44,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:44,567 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-10-15 16:44:44,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:44,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987880259] [2020-10-15 16:44:44,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:44,761 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:44,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987880259] [2020-10-15 16:44:44,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471472378] [2020-10-15 16:44:44,761 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 [2020-10-15 16:44:44,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:44,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:44,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:44,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:44,829 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:44,842 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:44,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:44,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:44,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258568346] [2020-10-15 16:44:44,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:44,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:44,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:44,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:44,844 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:45,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:45,910 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-10-15 16:44:45,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:44:45,911 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:45,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:45,912 INFO L225 Difference]: With dead ends: 97 [2020-10-15 16:44:45,912 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 16:44:45,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 16:44:45,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 16:44:45,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-15 16:44:45,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:45,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:45,914 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:45,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:45,915 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:45,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:45,915 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:45,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:45,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:45,915 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:46,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-15 16:44:46,116 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:46,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:46,117 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-10-15 16:44:46,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:46,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442153049] [2020-10-15 16:44:46,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:46,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442153049] [2020-10-15 16:44:46,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112340958] [2020-10-15 16:44:46,296 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 [2020-10-15 16:44:46,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 16:44:46,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:46,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:46,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:46,364 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:46,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:46,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:46,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998844309] [2020-10-15 16:44:46,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:46,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:46,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:46,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:46,365 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:47,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:47,226 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-15 16:44:47,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:44:47,227 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:47,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:47,227 INFO L225 Difference]: With dead ends: 113 [2020-10-15 16:44:47,227 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 16:44:47,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 16:44:47,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 16:44:47,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-10-15 16:44:47,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 16:44:47,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-10-15 16:44:47,230 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-10-15 16:44:47,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:47,230 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-10-15 16:44:47,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:47,231 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-10-15 16:44:47,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:47,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:47,231 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:47,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-15 16:44:47,432 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:47,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:47,432 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-10-15 16:44:47,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:47,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863841359] [2020-10-15 16:44:47,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:47,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863841359] [2020-10-15 16:44:47,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972629411] [2020-10-15 16:44:47,627 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 [2020-10-15 16:44:47,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 16:44:47,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:47,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:47,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:47,708 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:47,730 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:47,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:47,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:47,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839076666] [2020-10-15 16:44:47,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:47,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:47,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:47,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:47,732 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-10-15 16:44:48,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:48,851 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-10-15 16:44:48,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:44:48,852 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:48,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:48,852 INFO L225 Difference]: With dead ends: 94 [2020-10-15 16:44:48,852 INFO L226 Difference]: Without dead ends: 86 [2020-10-15 16:44:48,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:44:48,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-15 16:44:48,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-10-15 16:44:48,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 16:44:48,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-10-15 16:44:48,854 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-10-15 16:44:48,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:48,855 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-10-15 16:44:48,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:48,855 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-10-15 16:44:48,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:48,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:48,855 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:49,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-15 16:44:49,056 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:49,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:49,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-10-15 16:44:49,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:49,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805013690] [2020-10-15 16:44:49,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:49,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805013690] [2020-10-15 16:44:49,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094970244] [2020-10-15 16:44:49,262 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 [2020-10-15 16:44:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:49,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:49,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:49,330 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:44:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:49,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:49,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:49,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377022250] [2020-10-15 16:44:49,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:49,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:49,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:49,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:49,350 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-10-15 16:44:50,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:50,371 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-15 16:44:50,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:44:50,371 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:50,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:50,372 INFO L225 Difference]: With dead ends: 108 [2020-10-15 16:44:50,372 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 16:44:50,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:44:50,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 16:44:50,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-10-15 16:44:50,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:44:50,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-15 16:44:50,375 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-10-15 16:44:50,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:50,375 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-15 16:44:50,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:50,375 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-15 16:44:50,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:50,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:50,375 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:50,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-15 16:44:50,576 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:50,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:50,577 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-10-15 16:44:50,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:50,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282827237] [2020-10-15 16:44:50,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:50,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:50,793 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:50,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282827237] [2020-10-15 16:44:50,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378171321] [2020-10-15 16:44:50,794 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 [2020-10-15 16:44:50,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:50,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:50,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:50,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:50,875 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:44:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:50,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:50,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:44:50,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032563321] [2020-10-15 16:44:50,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:50,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:50,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:50,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:50,904 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-10-15 16:44:52,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:52,050 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-10-15 16:44:52,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:44:52,051 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:44:52,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:52,051 INFO L225 Difference]: With dead ends: 90 [2020-10-15 16:44:52,051 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 16:44:52,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 16:44:52,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 16:44:52,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-15 16:44:52,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:44:52,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-15 16:44:52,054 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-10-15 16:44:52,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:52,054 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-15 16:44:52,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:52,054 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-15 16:44:52,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:52,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:52,055 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:52,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:52,255 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:52,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:52,256 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-10-15 16:44:52,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:52,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580521503] [2020-10-15 16:44:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:52,543 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:52,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580521503] [2020-10-15 16:44:52,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319642144] [2020-10-15 16:44:52,544 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 [2020-10-15 16:44:52,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:44:52,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:52,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:52,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:52,609 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:52,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:52,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:44:52,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627549707] [2020-10-15 16:44:52,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:52,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:52,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:52,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:52,610 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-10-15 16:44:53,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:53,063 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-10-15 16:44:53,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:44:53,064 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:44:53,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:53,064 INFO L225 Difference]: With dead ends: 96 [2020-10-15 16:44:53,064 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 16:44:53,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:44:53,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 16:44:53,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-15 16:44:53,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 16:44:53,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-10-15 16:44:53,067 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-10-15 16:44:53,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:53,067 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-10-15 16:44:53,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:53,067 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-10-15 16:44:53,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:53,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:53,068 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:53,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:53,268 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:53,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:53,269 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-10-15 16:44:53,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:53,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83821231] [2020-10-15 16:44:53,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:53,557 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:53,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83821231] [2020-10-15 16:44:53,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115858243] [2020-10-15 16:44:53,558 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 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 [2020-10-15 16:44:53,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:53,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:53,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:53,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:53,632 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:53,643 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:53,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:53,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:44:53,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028230377] [2020-10-15 16:44:53,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:53,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:53,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:53,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:53,645 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-10-15 16:44:54,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:54,173 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-10-15 16:44:54,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:44:54,174 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:44:54,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:54,175 INFO L225 Difference]: With dead ends: 114 [2020-10-15 16:44:54,175 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 16:44:54,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:44:54,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 16:44:54,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-10-15 16:44:54,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:44:54,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-10-15 16:44:54,177 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-10-15 16:44:54,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:54,177 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-10-15 16:44:54,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:54,177 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-10-15 16:44:54,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:54,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:54,178 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:54,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:54,379 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:54,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:54,379 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-10-15 16:44:54,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:54,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733741832] [2020-10-15 16:44:54,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:54,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:54,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733741832] [2020-10-15 16:44:54,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758187141] [2020-10-15 16:44:54,668 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 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 [2020-10-15 16:44:54,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 16:44:54,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:54,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:54,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:54,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:54,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:44:54,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802835816] [2020-10-15 16:44:54,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:54,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:54,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:54,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:54,734 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-10-15 16:44:55,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:55,306 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-10-15 16:44:55,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:44:55,307 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:44:55,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:55,307 INFO L225 Difference]: With dead ends: 115 [2020-10-15 16:44:55,307 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 16:44:55,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:44:55,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 16:44:55,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-10-15 16:44:55,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 16:44:55,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-10-15 16:44:55,310 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-10-15 16:44:55,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:55,310 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-10-15 16:44:55,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:55,310 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-10-15 16:44:55,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:55,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:55,311 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:55,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:55,511 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:55,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:55,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-10-15 16:44:55,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:55,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137713080] [2020-10-15 16:44:55,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:55,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:55,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137713080] [2020-10-15 16:44:55,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412569839] [2020-10-15 16:44:55,801 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 [2020-10-15 16:44:55,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 16:44:55,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:55,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:55,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:55,876 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:55,887 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:55,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:55,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:44:55,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382911602] [2020-10-15 16:44:55,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:55,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:55,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:55,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:55,888 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-10-15 16:44:56,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:56,468 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-10-15 16:44:56,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:44:56,468 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:44:56,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:56,469 INFO L225 Difference]: With dead ends: 129 [2020-10-15 16:44:56,469 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 16:44:56,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:44:56,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 16:44:56,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-10-15 16:44:56,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 16:44:56,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-10-15 16:44:56,471 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-10-15 16:44:56,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:56,472 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-10-15 16:44:56,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:56,472 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-10-15 16:44:56,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:56,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:56,473 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:56,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:56,673 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:56,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:56,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-10-15 16:44:56,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:56,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741701370] [2020-10-15 16:44:56,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:56,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:56,934 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:56,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741701370] [2020-10-15 16:44:56,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158632528] [2020-10-15 16:44:56,935 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 [2020-10-15 16:44:56,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:56,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:56,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:56,993 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:56,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:56,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:44:56,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374604121] [2020-10-15 16:44:56,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:56,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:56,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:56,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:56,994 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-10-15 16:44:57,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:57,626 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-10-15 16:44:57,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:44:57,627 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:44:57,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:57,628 INFO L225 Difference]: With dead ends: 129 [2020-10-15 16:44:57,628 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 16:44:57,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:44:57,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 16:44:57,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-10-15 16:44:57,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 16:44:57,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-10-15 16:44:57,630 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-10-15 16:44:57,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:57,630 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-10-15 16:44:57,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:57,631 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-10-15 16:44:57,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:57,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:57,631 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:57,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:57,832 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:57,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:57,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-10-15 16:44:57,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:57,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902861182] [2020-10-15 16:44:57,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:57,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:58,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902861182] [2020-10-15 16:44:58,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868158355] [2020-10-15 16:44:58,097 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 [2020-10-15 16:44:58,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:58,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:58,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:58,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:58,166 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:58,179 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:58,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:58,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:44:58,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301528569] [2020-10-15 16:44:58,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:58,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:58,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:58,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:58,181 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-10-15 16:44:58,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:58,885 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-10-15 16:44:58,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:44:58,886 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:44:58,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:58,886 INFO L225 Difference]: With dead ends: 126 [2020-10-15 16:44:58,886 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 16:44:58,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:44:58,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 16:44:58,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-10-15 16:44:58,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 16:44:58,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-10-15 16:44:58,889 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-10-15 16:44:58,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:58,889 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-10-15 16:44:58,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:58,890 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-10-15 16:44:58,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:58,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:58,890 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:59,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:59,093 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:59,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:59,093 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-10-15 16:44:59,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:59,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705387852] [2020-10-15 16:44:59,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:59,342 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:59,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705387852] [2020-10-15 16:44:59,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966387863] [2020-10-15 16:44:59,342 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 [2020-10-15 16:44:59,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:44:59,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:59,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:59,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:59,408 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:59,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:59,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:44:59,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129249085] [2020-10-15 16:44:59,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:59,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:59,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:59,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:59,409 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-10-15 16:45:00,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:00,097 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-10-15 16:45:00,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:45:00,098 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:45:00,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:00,098 INFO L225 Difference]: With dead ends: 127 [2020-10-15 16:45:00,098 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 16:45:00,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 16:45:00,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 16:45:00,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-10-15 16:45:00,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:45:00,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-10-15 16:45:00,100 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-10-15 16:45:00,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:00,101 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-10-15 16:45:00,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:45:00,101 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-10-15 16:45:00,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:00,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:00,101 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:00,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-15 16:45:00,302 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:00,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:00,303 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-10-15 16:45:00,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:00,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688593563] [2020-10-15 16:45:00,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:00,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:00,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688593563] [2020-10-15 16:45:00,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176246529] [2020-10-15 16:45:00,558 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 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 [2020-10-15 16:45:00,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:45:00,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:00,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:00,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:00,626 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:00,640 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:00,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:00,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:45:00,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091434224] [2020-10-15 16:45:00,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:00,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:00,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:00,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:00,642 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-10-15 16:45:01,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:01,450 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-10-15 16:45:01,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:45:01,451 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:45:01,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:01,452 INFO L225 Difference]: With dead ends: 124 [2020-10-15 16:45:01,452 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 16:45:01,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 16:45:01,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 16:45:01,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-10-15 16:45:01,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:45:01,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-10-15 16:45:01,454 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-10-15 16:45:01,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:01,454 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-10-15 16:45:01,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:01,454 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-10-15 16:45:01,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:01,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:01,455 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:01,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-15 16:45:01,656 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:01,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:01,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-10-15 16:45:01,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:01,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083587686] [2020-10-15 16:45:01,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:01,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:01,895 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:01,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083587686] [2020-10-15 16:45:01,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923230754] [2020-10-15 16:45:01,896 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 [2020-10-15 16:45:01,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 16:45:01,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:01,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:01,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:01,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:01,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:45:01,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558157759] [2020-10-15 16:45:01,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:45:01,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:01,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:45:01,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:45:01,964 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-10-15 16:45:02,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:02,703 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-10-15 16:45:02,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:45:02,704 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:45:02,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:02,704 INFO L225 Difference]: With dead ends: 125 [2020-10-15 16:45:02,704 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 16:45:02,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:45:02,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 16:45:02,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-10-15 16:45:02,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 16:45:02,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-10-15 16:45:02,706 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-10-15 16:45:02,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:02,706 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-10-15 16:45:02,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:45:02,707 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-10-15 16:45:02,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:02,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:02,707 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:02,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-15 16:45:02,908 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:02,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:02,908 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-10-15 16:45:02,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:02,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624036069] [2020-10-15 16:45:02,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:03,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624036069] [2020-10-15 16:45:03,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821421944] [2020-10-15 16:45:03,161 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 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 [2020-10-15 16:45:03,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 16:45:03,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:03,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:03,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:03,237 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:03,252 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:03,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:03,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:45:03,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162400604] [2020-10-15 16:45:03,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:03,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:03,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:03,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:03,253 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-10-15 16:45:04,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:04,139 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-10-15 16:45:04,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:45:04,140 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:45:04,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:04,141 INFO L225 Difference]: With dead ends: 122 [2020-10-15 16:45:04,141 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 16:45:04,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:45:04,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 16:45:04,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-10-15 16:45:04,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 16:45:04,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-15 16:45:04,143 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-10-15 16:45:04,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:04,144 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-15 16:45:04,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:04,144 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-15 16:45:04,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:04,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:04,144 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:04,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-15 16:45:04,345 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:04,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:04,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-10-15 16:45:04,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:04,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722668663] [2020-10-15 16:45:04,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:04,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:04,582 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:04,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722668663] [2020-10-15 16:45:04,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666924063] [2020-10-15 16:45:04,582 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 [2020-10-15 16:45:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:04,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:04,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:04,646 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:04,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:04,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:45:04,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057000641] [2020-10-15 16:45:04,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:45:04,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:04,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:45:04,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:45:04,648 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-10-15 16:45:05,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:05,443 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-15 16:45:05,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:45:05,443 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:45:05,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:05,444 INFO L225 Difference]: With dead ends: 123 [2020-10-15 16:45:05,444 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:45:05,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 16:45:05,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:45:05,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-15 16:45:05,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 16:45:05,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-10-15 16:45:05,446 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-10-15 16:45:05,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:05,446 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-10-15 16:45:05,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:45:05,446 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-10-15 16:45:05,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:05,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:05,447 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:05,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:05,647 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:05,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:05,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-10-15 16:45:05,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:05,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578721832] [2020-10-15 16:45:05,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:05,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:05,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578721832] [2020-10-15 16:45:05,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723858804] [2020-10-15 16:45:05,896 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 [2020-10-15 16:45:05,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:45:05,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:05,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:05,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:05,965 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:05,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:05,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:45:05,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369451301] [2020-10-15 16:45:05,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:05,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:05,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:05,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:05,983 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-10-15 16:45:06,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:06,957 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-10-15 16:45:06,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:45:06,958 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:45:06,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:06,958 INFO L225 Difference]: With dead ends: 120 [2020-10-15 16:45:06,958 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 16:45:06,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 16:45:06,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 16:45:06,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-10-15 16:45:06,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 16:45:06,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-10-15 16:45:06,961 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-10-15 16:45:06,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:06,961 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-10-15 16:45:06,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:06,962 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-10-15 16:45:06,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:06,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:06,962 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:07,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:07,163 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:07,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:07,163 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-10-15 16:45:07,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:07,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534329089] [2020-10-15 16:45:07,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:07,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534329089] [2020-10-15 16:45:07,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248596481] [2020-10-15 16:45:07,395 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 [2020-10-15 16:45:07,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:45:07,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:07,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:07,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:07,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:07,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:45:07,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429647300] [2020-10-15 16:45:07,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:45:07,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:07,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:45:07,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:45:07,467 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-10-15 16:45:08,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:08,328 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-15 16:45:08,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:45:08,329 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:45:08,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:08,329 INFO L225 Difference]: With dead ends: 121 [2020-10-15 16:45:08,330 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 16:45:08,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 16:45:08,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 16:45:08,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-10-15 16:45:08,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:45:08,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:45:08,332 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-10-15 16:45:08,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:08,332 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:45:08,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:45:08,332 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:45:08,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:08,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:08,333 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:08,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-10-15 16:45:08,533 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:08,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:08,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-10-15 16:45:08,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:08,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676915018] [2020-10-15 16:45:08,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:08,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676915018] [2020-10-15 16:45:08,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742232939] [2020-10-15 16:45:08,765 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 [2020-10-15 16:45:08,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:45:08,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:08,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:08,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:08,836 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:08,855 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:08,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:08,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:45:08,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007726807] [2020-10-15 16:45:08,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:08,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:08,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:08,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:08,857 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-10-15 16:45:09,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:09,922 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-15 16:45:09,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:45:09,923 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:45:09,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:09,924 INFO L225 Difference]: With dead ends: 118 [2020-10-15 16:45:09,924 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 16:45:09,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 16:45:09,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 16:45:09,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-10-15 16:45:09,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:45:09,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:45:09,926 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-10-15 16:45:09,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:09,927 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:45:09,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:09,927 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:45:09,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:09,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:09,927 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:10,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:10,128 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:10,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:10,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-10-15 16:45:10,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:10,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080681750] [2020-10-15 16:45:10,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:10,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:10,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080681750] [2020-10-15 16:45:10,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353365776] [2020-10-15 16:45:10,352 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 [2020-10-15 16:45:10,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 16:45:10,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:10,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:10,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:10,422 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:10,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:10,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:45:10,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569039144] [2020-10-15 16:45:10,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:45:10,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:10,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:45:10,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:45:10,424 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-10-15 16:45:11,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:11,366 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-10-15 16:45:11,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:45:11,366 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:45:11,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:11,367 INFO L225 Difference]: With dead ends: 119 [2020-10-15 16:45:11,367 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 16:45:11,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:45:11,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 16:45:11,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-10-15 16:45:11,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 16:45:11,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-15 16:45:11,371 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-10-15 16:45:11,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:11,371 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-15 16:45:11,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:45:11,371 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-15 16:45:11,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:11,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:11,372 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:11,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:11,579 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:11,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:11,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-10-15 16:45:11,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:11,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129826913] [2020-10-15 16:45:11,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:11,810 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:11,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129826913] [2020-10-15 16:45:11,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581081310] [2020-10-15 16:45:11,811 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 [2020-10-15 16:45:11,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 16:45:11,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:11,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:11,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:11,885 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:11,906 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:11,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:11,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:45:11,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515662759] [2020-10-15 16:45:11,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:11,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:11,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:11,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:11,907 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-15 16:45:13,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:13,093 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-10-15 16:45:13,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:45:13,094 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:45:13,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:13,094 INFO L225 Difference]: With dead ends: 116 [2020-10-15 16:45:13,094 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 16:45:13,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 16:45:13,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 16:45:13,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-10-15 16:45:13,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:45:13,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-15 16:45:13,096 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-10-15 16:45:13,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:13,097 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-15 16:45:13,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:13,097 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-15 16:45:13,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:13,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:13,097 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:13,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:13,298 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:13,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:13,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-10-15 16:45:13,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:13,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094676682] [2020-10-15 16:45:13,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:13,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:13,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094676682] [2020-10-15 16:45:13,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830769028] [2020-10-15 16:45:13,524 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 [2020-10-15 16:45:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:13,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:13,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:13,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:13,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:45:13,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151582013] [2020-10-15 16:45:13,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:45:13,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:13,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:45:13,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:45:13,594 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-10-15 16:45:14,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:14,581 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-15 16:45:14,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:45:14,581 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:45:14,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:14,582 INFO L225 Difference]: With dead ends: 136 [2020-10-15 16:45:14,582 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 16:45:14,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 16:45:14,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 16:45:14,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-10-15 16:45:14,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 16:45:14,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-10-15 16:45:14,586 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-10-15 16:45:14,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:14,586 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-10-15 16:45:14,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:45:14,586 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-10-15 16:45:14,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:14,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:14,587 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:14,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:14,795 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:14,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:14,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-10-15 16:45:14,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:14,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059993421] [2020-10-15 16:45:14,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:15,017 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:15,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059993421] [2020-10-15 16:45:15,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095777243] [2020-10-15 16:45:15,017 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 [2020-10-15 16:45:15,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:45:15,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:15,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:15,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:15,090 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:15,108 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:15,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:15,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:45:15,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426457430] [2020-10-15 16:45:15,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:15,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:15,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:15,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:15,109 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-10-15 16:45:16,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:16,325 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-10-15 16:45:16,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:45:16,325 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:45:16,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:16,326 INFO L225 Difference]: With dead ends: 117 [2020-10-15 16:45:16,326 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 16:45:16,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 16:45:16,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 16:45:16,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-10-15 16:45:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 16:45:16,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-15 16:45:16,329 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-15 16:45:16,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:16,329 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-15 16:45:16,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:16,330 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-15 16:45:16,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:16,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:16,330 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:16,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:16,531 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:16,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:16,531 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-10-15 16:45:16,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:16,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045735636] [2020-10-15 16:45:16,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:16,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:16,858 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:16,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045735636] [2020-10-15 16:45:16,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877656821] [2020-10-15 16:45:16,859 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 [2020-10-15 16:45:16,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:45:16,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:16,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:16,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:16,924 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:16,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:16,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:16,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404942221] [2020-10-15 16:45:16,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:16,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:16,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:16,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:16,925 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-15 16:45:17,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:17,483 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-10-15 16:45:17,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:45:17,484 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:17,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:17,484 INFO L225 Difference]: With dead ends: 134 [2020-10-15 16:45:17,484 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 16:45:17,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:45:17,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 16:45:17,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-10-15 16:45:17,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:17,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:17,487 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:45:17,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:17,487 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:17,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:17,487 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:17,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:17,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:17,487 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:17,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-10-15 16:45:17,688 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:17,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:17,689 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-10-15 16:45:17,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:17,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30766586] [2020-10-15 16:45:17,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:18,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30766586] [2020-10-15 16:45:18,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203972641] [2020-10-15 16:45:18,025 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 [2020-10-15 16:45:18,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:45:18,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:18,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:18,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:18,097 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:18,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:18,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:18,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872132798] [2020-10-15 16:45:18,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:18,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:18,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:18,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:18,110 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:45:18,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:18,772 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-10-15 16:45:18,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:45:18,773 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:18,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:18,774 INFO L225 Difference]: With dead ends: 131 [2020-10-15 16:45:18,774 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 16:45:18,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:45:18,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 16:45:18,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-10-15 16:45:18,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:18,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:18,777 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:45:18,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:18,777 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:18,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:18,777 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:18,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:18,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:18,777 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:18,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-15 16:45:18,978 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:18,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:18,979 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-10-15 16:45:18,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:18,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020349] [2020-10-15 16:45:18,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:18,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:19,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020349] [2020-10-15 16:45:19,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298593035] [2020-10-15 16:45:19,290 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 [2020-10-15 16:45:19,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 16:45:19,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:19,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:19,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:19,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:19,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:19,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122976756] [2020-10-15 16:45:19,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:19,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:19,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:19,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:19,358 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:19,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:19,989 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-10-15 16:45:19,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:45:19,990 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:19,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:19,991 INFO L225 Difference]: With dead ends: 128 [2020-10-15 16:45:19,991 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 16:45:19,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:45:19,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 16:45:19,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-10-15 16:45:19,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:19,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:19,993 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:45:19,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:19,993 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:19,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:19,993 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:19,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:19,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:19,994 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:20,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:20,195 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:20,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:20,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-10-15 16:45:20,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:20,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346726086] [2020-10-15 16:45:20,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:20,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346726086] [2020-10-15 16:45:20,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544222863] [2020-10-15 16:45:20,509 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 [2020-10-15 16:45:20,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 16:45:20,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:20,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:20,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:20,588 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:20,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:20,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:20,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448946118] [2020-10-15 16:45:20,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:20,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:20,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:20,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:20,602 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:45:21,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:21,344 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-10-15 16:45:21,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:45:21,345 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:21,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:21,345 INFO L225 Difference]: With dead ends: 127 [2020-10-15 16:45:21,345 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 16:45:21,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 16:45:21,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 16:45:21,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-10-15 16:45:21,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:21,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:21,348 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:45:21,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:21,349 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:21,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:21,349 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:21,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:21,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:21,349 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:21,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-10-15 16:45:21,552 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:21,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:21,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-10-15 16:45:21,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:21,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853515180] [2020-10-15 16:45:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:21,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:21,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853515180] [2020-10-15 16:45:21,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129480356] [2020-10-15 16:45:21,849 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 [2020-10-15 16:45:21,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:21,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:21,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:21,915 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:21,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:21,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:21,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192722654] [2020-10-15 16:45:21,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:21,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:21,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:21,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:21,916 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:22,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:22,605 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-10-15 16:45:22,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:45:22,606 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:22,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:22,606 INFO L225 Difference]: With dead ends: 124 [2020-10-15 16:45:22,606 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 16:45:22,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:45:22,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 16:45:22,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-10-15 16:45:22,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:22,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:22,609 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:45:22,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:22,609 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:22,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:22,609 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:22,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:22,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:22,610 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:22,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:22,810 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:22,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:22,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-10-15 16:45:22,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:22,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647305539] [2020-10-15 16:45:22,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:22,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:23,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647305539] [2020-10-15 16:45:23,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447788980] [2020-10-15 16:45:23,109 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 [2020-10-15 16:45:23,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:45:23,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:23,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:23,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:23,182 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:23,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:23,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:23,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805598367] [2020-10-15 16:45:23,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:23,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:23,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:23,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:23,199 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:45:24,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:24,062 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-15 16:45:24,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:45:24,063 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:24,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:24,064 INFO L225 Difference]: With dead ends: 123 [2020-10-15 16:45:24,064 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:45:24,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:45:24,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:45:24,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-10-15 16:45:24,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:24,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:24,067 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:45:24,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:24,067 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:24,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:24,067 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:24,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:24,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:24,067 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:24,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:24,268 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:24,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:24,269 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-10-15 16:45:24,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:24,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306506407] [2020-10-15 16:45:24,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:24,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:24,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306506407] [2020-10-15 16:45:24,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037819699] [2020-10-15 16:45:24,547 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 [2020-10-15 16:45:24,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:45:24,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:24,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:24,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:24,615 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:24,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:24,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:24,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154532663] [2020-10-15 16:45:24,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:24,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:24,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:24,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:24,616 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:25,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:25,390 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-15 16:45:25,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:45:25,391 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:25,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:25,391 INFO L225 Difference]: With dead ends: 120 [2020-10-15 16:45:25,391 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 16:45:25,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 16:45:25,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 16:45:25,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-10-15 16:45:25,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:25,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:25,394 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:45:25,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:25,394 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:25,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:25,394 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:25,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:25,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:25,394 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:25,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:25,595 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:25,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:25,596 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-10-15 16:45:25,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:25,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610843940] [2020-10-15 16:45:25,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:25,888 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:25,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610843940] [2020-10-15 16:45:25,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944977765] [2020-10-15 16:45:25,888 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 [2020-10-15 16:45:25,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:45:25,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:25,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:25,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:25,961 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:25,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:25,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:25,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73331769] [2020-10-15 16:45:25,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:25,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:25,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:25,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:25,977 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:45:26,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:26,937 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-10-15 16:45:26,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:45:26,937 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:26,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:26,938 INFO L225 Difference]: With dead ends: 119 [2020-10-15 16:45:26,938 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 16:45:26,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 16:45:26,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 16:45:26,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-10-15 16:45:26,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:26,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:26,941 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:45:26,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:26,941 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:26,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:26,942 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:26,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:26,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:26,942 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:27,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:27,150 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:27,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:27,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-10-15 16:45:27,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:27,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084272293] [2020-10-15 16:45:27,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:27,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084272293] [2020-10-15 16:45:27,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618302966] [2020-10-15 16:45:27,424 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 [2020-10-15 16:45:27,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 16:45:27,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:27,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:27,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:27,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:27,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:27,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020205457] [2020-10-15 16:45:27,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:27,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:27,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:27,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:27,497 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:28,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:28,349 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-10-15 16:45:28,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:45:28,350 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:28,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:28,350 INFO L225 Difference]: With dead ends: 116 [2020-10-15 16:45:28,351 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 16:45:28,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:45:28,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 16:45:28,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-10-15 16:45:28,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:28,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:28,353 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:45:28,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:28,353 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:28,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:28,354 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:28,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:28,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:28,354 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:28,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-10-15 16:45:28,555 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:28,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:28,555 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-10-15 16:45:28,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:28,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381722213] [2020-10-15 16:45:28,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:28,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381722213] [2020-10-15 16:45:28,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312062737] [2020-10-15 16:45:28,832 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 [2020-10-15 16:45:28,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 16:45:28,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:28,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:28,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:28,908 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:28,923 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:28,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:28,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:28,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965334865] [2020-10-15 16:45:28,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:28,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:28,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:28,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:28,924 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:45:30,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:30,014 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-10-15 16:45:30,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:45:30,015 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:30,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:30,016 INFO L225 Difference]: With dead ends: 115 [2020-10-15 16:45:30,016 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 16:45:30,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 16:45:30,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 16:45:30,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-10-15 16:45:30,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:30,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:30,020 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:45:30,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:30,020 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:30,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:30,020 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:30,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:30,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:30,021 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:30,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:30,221 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:30,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:30,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-10-15 16:45:30,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:30,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715909298] [2020-10-15 16:45:30,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:30,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715909298] [2020-10-15 16:45:30,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858096297] [2020-10-15 16:45:30,483 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 [2020-10-15 16:45:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:30,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:30,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:30,557 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:30,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:30,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:30,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964761019] [2020-10-15 16:45:30,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:30,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:30,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:30,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:30,558 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:31,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:31,474 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-15 16:45:31,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:45:31,474 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:31,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:31,475 INFO L225 Difference]: With dead ends: 112 [2020-10-15 16:45:31,475 INFO L226 Difference]: Without dead ends: 106 [2020-10-15 16:45:31,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 16:45:31,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-15 16:45:31,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-10-15 16:45:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:31,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:31,478 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:45:31,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:31,478 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:31,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:31,479 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:31,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:31,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:31,479 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:31,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-10-15 16:45:31,680 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:31,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:31,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-10-15 16:45:31,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:31,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157515260] [2020-10-15 16:45:31,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:31,936 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:31,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157515260] [2020-10-15 16:45:31,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470392439] [2020-10-15 16:45:31,937 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 [2020-10-15 16:45:31,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:45:31,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:31,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:31,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:32,011 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:32,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:32,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:32,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640707328] [2020-10-15 16:45:32,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:32,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:32,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:32,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:32,033 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:45:33,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:33,204 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-10-15 16:45:33,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:45:33,204 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:33,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:33,205 INFO L225 Difference]: With dead ends: 111 [2020-10-15 16:45:33,205 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 16:45:33,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:45:33,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 16:45:33,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-10-15 16:45:33,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:33,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:33,207 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:45:33,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:33,207 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:33,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:33,207 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:33,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:33,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:33,207 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:33,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-15 16:45:33,408 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:33,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:33,409 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-10-15 16:45:33,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:33,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129539885] [2020-10-15 16:45:33,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:33,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:33,664 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:33,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129539885] [2020-10-15 16:45:33,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054212679] [2020-10-15 16:45:33,665 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 [2020-10-15 16:45:33,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:45:33,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:33,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:33,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:33,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:33,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:33,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539237489] [2020-10-15 16:45:33,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:33,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:33,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:33,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:33,740 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:34,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:34,729 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-15 16:45:34,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:45:34,730 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:34,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:34,730 INFO L225 Difference]: With dead ends: 108 [2020-10-15 16:45:34,730 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 16:45:34,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 16:45:34,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 16:45:34,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-10-15 16:45:34,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:34,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:34,733 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:45:34,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:34,733 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:34,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:34,733 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:34,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:34,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:34,734 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:34,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:34,935 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:34,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:34,936 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-10-15 16:45:34,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:34,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036203643] [2020-10-15 16:45:34,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:35,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036203643] [2020-10-15 16:45:35,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660054331] [2020-10-15 16:45:35,207 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 [2020-10-15 16:45:35,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:45:35,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:35,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:35,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:35,282 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:35,300 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:35,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:35,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:35,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328541057] [2020-10-15 16:45:35,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:35,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:35,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:35,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:35,302 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:45:36,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:36,595 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-15 16:45:36,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:45:36,596 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:36,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:36,597 INFO L225 Difference]: With dead ends: 107 [2020-10-15 16:45:36,597 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 16:45:36,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 16:45:36,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 16:45:36,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-10-15 16:45:36,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:36,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:36,600 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:45:36,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:36,600 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:36,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:36,601 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:36,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:36,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:36,601 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:36,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:36,810 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:36,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:36,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-10-15 16:45:36,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:36,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433254192] [2020-10-15 16:45:36,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:37,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433254192] [2020-10-15 16:45:37,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205313377] [2020-10-15 16:45:37,070 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 [2020-10-15 16:45:37,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 16:45:37,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:37,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:37,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:37,149 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:37,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:37,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:37,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754346111] [2020-10-15 16:45:37,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:37,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:37,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:37,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:37,151 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:38,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:38,227 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-10-15 16:45:38,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:45:38,228 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:38,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:38,228 INFO L225 Difference]: With dead ends: 104 [2020-10-15 16:45:38,229 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 16:45:38,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 16:45:38,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 16:45:38,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-15 16:45:38,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:38,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:38,231 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:45:38,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:38,231 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:38,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:38,232 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:38,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:38,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:38,232 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:38,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:38,433 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:38,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:38,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-10-15 16:45:38,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:38,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451137419] [2020-10-15 16:45:38,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:38,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:38,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451137419] [2020-10-15 16:45:38,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325336012] [2020-10-15 16:45:38,697 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 [2020-10-15 16:45:38,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 16:45:38,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:38,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:38,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:38,785 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:38,802 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:38,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:38,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:38,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817471200] [2020-10-15 16:45:38,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:38,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:38,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:38,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:38,803 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:45:40,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:40,201 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-10-15 16:45:40,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:45:40,202 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:40,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:40,203 INFO L225 Difference]: With dead ends: 103 [2020-10-15 16:45:40,203 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 16:45:40,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 16:45:40,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 16:45:40,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-15 16:45:40,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:40,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:40,206 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:45:40,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:40,206 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:40,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:40,206 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:40,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:40,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:40,206 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:40,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-10-15 16:45:40,414 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:40,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:40,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-10-15 16:45:40,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:40,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584280438] [2020-10-15 16:45:40,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:40,675 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:40,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584280438] [2020-10-15 16:45:40,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650748253] [2020-10-15 16:45:40,676 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 [2020-10-15 16:45:40,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:40,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:40,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:40,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:40,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:40,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799331100] [2020-10-15 16:45:40,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:40,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:40,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:40,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:40,759 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:41,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:41,914 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-15 16:45:41,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:45:41,915 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:41,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:41,916 INFO L225 Difference]: With dead ends: 119 [2020-10-15 16:45:41,916 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 16:45:41,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 16:45:41,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 16:45:41,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-10-15 16:45:41,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 16:45:41,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-10-15 16:45:41,919 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-10-15 16:45:41,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:41,919 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-10-15 16:45:41,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:41,920 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-10-15 16:45:41,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:41,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:41,920 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:42,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:42,121 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:42,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:42,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-10-15 16:45:42,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:42,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620571659] [2020-10-15 16:45:42,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:42,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:42,382 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:42,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620571659] [2020-10-15 16:45:42,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092415323] [2020-10-15 16:45:42,383 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 [2020-10-15 16:45:42,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:45:42,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:42,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:42,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:42,457 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:42,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:42,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:42,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461724301] [2020-10-15 16:45:42,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:42,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:42,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:42,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:42,477 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-10-15 16:45:43,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:43,952 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-10-15 16:45:43,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 16:45:43,953 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:43,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:43,954 INFO L225 Difference]: With dead ends: 100 [2020-10-15 16:45:43,954 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 16:45:43,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:45:43,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 16:45:43,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-15 16:45:43,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 16:45:43,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-10-15 16:45:43,956 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-10-15 16:45:43,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:43,956 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-10-15 16:45:43,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:43,957 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-10-15 16:45:43,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:43,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:43,957 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:44,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:44,158 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:44,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:44,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-10-15 16:45:44,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:44,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502582559] [2020-10-15 16:45:44,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:44,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:44,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502582559] [2020-10-15 16:45:44,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963365845] [2020-10-15 16:45:44,426 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 [2020-10-15 16:45:44,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:45:44,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:44,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:44,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:44,522 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:45:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:44,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:44,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:44,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53594743] [2020-10-15 16:45:44,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:44,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:44,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:44,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:44,553 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-10-15 16:45:45,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:45,980 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-10-15 16:45:45,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:45:45,981 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:45,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:45,981 INFO L225 Difference]: With dead ends: 116 [2020-10-15 16:45:45,981 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 16:45:45,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:45:45,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 16:45:45,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-10-15 16:45:45,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 16:45:45,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-15 16:45:45,984 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-10-15 16:45:45,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:45,984 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-15 16:45:45,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:45,984 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-15 16:45:45,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:45,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:45,984 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:46,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:46,185 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:46,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:46,186 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-10-15 16:45:46,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:46,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623832371] [2020-10-15 16:45:46,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:46,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623832371] [2020-10-15 16:45:46,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028732343] [2020-10-15 16:45:46,477 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 [2020-10-15 16:45:46,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:45:46,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:46,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:46,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:46,553 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:45:46,580 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:46,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:46,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:45:46,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943465156] [2020-10-15 16:45:46,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:46,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:46,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:46,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:46,582 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-10-15 16:45:48,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:48,062 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-10-15 16:45:48,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:45:48,063 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:45:48,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:48,064 INFO L225 Difference]: With dead ends: 96 [2020-10-15 16:45:48,064 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 16:45:48,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 16:45:48,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 16:45:48,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-15 16:45:48,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 16:45:48,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-15 16:45:48,066 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-10-15 16:45:48,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:48,066 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-15 16:45:48,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:48,066 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-15 16:45:48,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:48,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:48,066 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:48,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:48,267 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:48,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:48,267 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-10-15 16:45:48,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:48,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159168545] [2020-10-15 16:45:48,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:48,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159168545] [2020-10-15 16:45:48,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394074457] [2020-10-15 16:45:48,647 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 [2020-10-15 16:45:48,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 16:45:48,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:48,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:48,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:48,715 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:48,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:48,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:45:48,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909336682] [2020-10-15 16:45:48,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:48,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:48,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:48,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:48,717 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-10-15 16:45:49,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:49,288 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-10-15 16:45:49,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:45:49,289 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:45:49,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:49,289 INFO L225 Difference]: With dead ends: 102 [2020-10-15 16:45:49,289 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 16:45:49,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:45:49,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 16:45:49,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-10-15 16:45:49,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:45:49,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-10-15 16:45:49,292 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-10-15 16:45:49,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:49,292 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-10-15 16:45:49,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:49,292 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-10-15 16:45:49,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:49,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:49,293 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:49,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-10-15 16:45:49,493 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:49,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:49,494 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-10-15 16:45:49,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:49,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183694954] [2020-10-15 16:45:49,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:49,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183694954] [2020-10-15 16:45:49,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796976325] [2020-10-15 16:45:49,883 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 [2020-10-15 16:45:49,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 16:45:49,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:49,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:49,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:49,973 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:49,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:49,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:45:49,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565123924] [2020-10-15 16:45:49,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:49,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:49,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:49,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:49,986 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-10-15 16:45:50,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:50,638 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-10-15 16:45:50,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:45:50,639 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:45:50,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:50,639 INFO L225 Difference]: With dead ends: 122 [2020-10-15 16:45:50,639 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 16:45:50,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:45:50,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 16:45:50,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-10-15 16:45:50,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 16:45:50,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-10-15 16:45:50,642 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-10-15 16:45:50,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:50,642 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-10-15 16:45:50,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:50,642 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-10-15 16:45:50,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:50,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:50,643 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:50,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-15 16:45:50,844 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:50,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:50,844 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-10-15 16:45:50,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:50,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805933043] [2020-10-15 16:45:50,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:50,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:51,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805933043] [2020-10-15 16:45:51,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817845463] [2020-10-15 16:45:51,234 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 [2020-10-15 16:45:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:51,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:51,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:51,295 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:51,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:51,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:45:51,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435624492] [2020-10-15 16:45:51,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:51,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:51,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:51,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:51,297 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-10-15 16:45:52,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:52,024 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-10-15 16:45:52,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:45:52,025 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:45:52,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:52,026 INFO L225 Difference]: With dead ends: 123 [2020-10-15 16:45:52,026 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:45:52,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:45:52,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:45:52,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-10-15 16:45:52,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:45:52,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-10-15 16:45:52,029 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-10-15 16:45:52,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:52,029 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-10-15 16:45:52,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:52,029 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-10-15 16:45:52,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:52,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:52,029 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:52,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-15 16:45:52,230 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:52,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:52,231 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-10-15 16:45:52,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:52,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758011261] [2020-10-15 16:45:52,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:52,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758011261] [2020-10-15 16:45:52,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450942107] [2020-10-15 16:45:52,605 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 [2020-10-15 16:45:52,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:45:52,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:52,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:52,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:52,679 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:52,692 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:52,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:52,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:45:52,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712603365] [2020-10-15 16:45:52,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:52,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:52,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:52,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:52,694 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-10-15 16:45:53,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:53,442 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-10-15 16:45:53,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:45:53,443 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:45:53,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:53,443 INFO L225 Difference]: With dead ends: 139 [2020-10-15 16:45:53,443 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 16:45:53,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 16:45:53,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 16:45:53,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-10-15 16:45:53,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:45:53,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-10-15 16:45:53,447 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-10-15 16:45:53,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:53,447 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-10-15 16:45:53,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:53,447 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-10-15 16:45:53,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:53,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:53,447 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:53,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-15 16:45:53,655 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:53,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:53,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-10-15 16:45:53,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:53,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682241861] [2020-10-15 16:45:53,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:54,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682241861] [2020-10-15 16:45:54,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656811249] [2020-10-15 16:45:54,023 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 [2020-10-15 16:45:54,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 16:45:54,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:54,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:54,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:54,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:54,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:45:54,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297389773] [2020-10-15 16:45:54,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:54,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:54,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:54,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:54,091 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-10-15 16:45:54,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:54,893 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-10-15 16:45:54,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:45:54,894 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:45:54,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:54,894 INFO L225 Difference]: With dead ends: 139 [2020-10-15 16:45:54,895 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 16:45:54,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:45:54,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 16:45:54,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-10-15 16:45:54,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 16:45:54,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-10-15 16:45:54,897 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-10-15 16:45:54,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:54,897 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-10-15 16:45:54,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:54,897 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-10-15 16:45:54,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:54,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:54,897 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:55,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:55,098 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:55,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:55,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-10-15 16:45:55,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:55,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451871081] [2020-10-15 16:45:55,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:55,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451871081] [2020-10-15 16:45:55,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521786143] [2020-10-15 16:45:55,461 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 [2020-10-15 16:45:55,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:45:55,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:55,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:55,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:55,539 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:55,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:55,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:45:55,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172640029] [2020-10-15 16:45:55,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:55,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:55,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:55,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:55,555 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-10-15 16:45:56,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:56,452 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-10-15 16:45:56,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:45:56,453 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:45:56,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:56,454 INFO L225 Difference]: With dead ends: 136 [2020-10-15 16:45:56,454 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 16:45:56,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:45:56,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 16:45:56,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-10-15 16:45:56,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 16:45:56,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-10-15 16:45:56,456 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-10-15 16:45:56,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:56,456 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-10-15 16:45:56,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:56,456 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-10-15 16:45:56,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:56,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:56,457 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:56,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-15 16:45:56,657 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:56,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:56,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-10-15 16:45:56,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:56,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199751586] [2020-10-15 16:45:56,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:57,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199751586] [2020-10-15 16:45:57,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773915339] [2020-10-15 16:45:57,007 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 [2020-10-15 16:45:57,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 16:45:57,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:57,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:57,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:57,075 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:57,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:57,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:45:57,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170974729] [2020-10-15 16:45:57,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:57,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:57,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:57,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:57,076 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-10-15 16:45:57,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:57,963 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-10-15 16:45:57,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:45:57,963 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:45:57,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:57,964 INFO L225 Difference]: With dead ends: 137 [2020-10-15 16:45:57,964 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 16:45:57,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 16:45:57,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 16:45:57,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-10-15 16:45:57,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 16:45:57,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-10-15 16:45:57,967 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-10-15 16:45:57,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:57,967 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-10-15 16:45:57,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:57,967 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-10-15 16:45:57,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:57,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:57,967 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:58,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:58,168 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:58,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:58,169 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-10-15 16:45:58,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:58,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994666496] [2020-10-15 16:45:58,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:58,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:58,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994666496] [2020-10-15 16:45:58,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788744521] [2020-10-15 16:45:58,514 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 [2020-10-15 16:45:58,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 16:45:58,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:58,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:58,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:58,597 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:58,613 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:58,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:58,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:45:58,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749909479] [2020-10-15 16:45:58,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:58,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:58,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:58,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:58,614 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-10-15 16:45:59,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:59,735 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-10-15 16:45:59,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:45:59,736 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:45:59,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:59,736 INFO L225 Difference]: With dead ends: 134 [2020-10-15 16:45:59,736 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 16:45:59,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 16:45:59,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 16:45:59,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-10-15 16:45:59,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 16:45:59,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-10-15 16:45:59,741 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-10-15 16:45:59,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:59,742 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-10-15 16:45:59,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:59,742 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-10-15 16:45:59,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:59,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:59,742 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:59,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-10-15 16:45:59,946 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:59,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:59,946 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-10-15 16:45:59,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:59,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985211691] [2020-10-15 16:45:59,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:00,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985211691] [2020-10-15 16:46:00,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867824062] [2020-10-15 16:46:00,271 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 [2020-10-15 16:46:00,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:00,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:00,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:00,336 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:00,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:00,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:46:00,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963915024] [2020-10-15 16:46:00,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:46:00,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:00,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:46:00,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:46:00,337 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-10-15 16:46:01,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:01,296 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-10-15 16:46:01,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:46:01,297 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:46:01,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:01,298 INFO L225 Difference]: With dead ends: 135 [2020-10-15 16:46:01,298 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 16:46:01,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 16:46:01,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 16:46:01,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-10-15 16:46:01,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:46:01,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-10-15 16:46:01,300 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-10-15 16:46:01,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:01,301 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-10-15 16:46:01,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:46:01,301 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-10-15 16:46:01,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:01,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:01,301 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:01,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:01,502 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:01,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:01,503 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-10-15 16:46:01,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:01,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144813251] [2020-10-15 16:46:01,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:01,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:01,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144813251] [2020-10-15 16:46:01,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829333562] [2020-10-15 16:46:01,843 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 [2020-10-15 16:46:01,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:46:01,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:01,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:01,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:01,928 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:01,944 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:01,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:01,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:46:01,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881706070] [2020-10-15 16:46:01,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:01,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:01,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:01,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:01,945 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-10-15 16:46:03,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:03,052 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-10-15 16:46:03,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:46:03,053 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:46:03,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:03,054 INFO L225 Difference]: With dead ends: 132 [2020-10-15 16:46:03,054 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 16:46:03,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 16:46:03,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 16:46:03,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-10-15 16:46:03,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:46:03,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-10-15 16:46:03,057 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-10-15 16:46:03,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:03,057 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-10-15 16:46:03,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:03,057 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-10-15 16:46:03,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:03,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:03,057 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:03,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:03,258 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:03,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:03,258 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-10-15 16:46:03,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:03,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122406071] [2020-10-15 16:46:03,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:03,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122406071] [2020-10-15 16:46:03,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844099587] [2020-10-15 16:46:03,588 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 [2020-10-15 16:46:03,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 16:46:03,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:03,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:03,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:03,661 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:03,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:03,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:46:03,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248744553] [2020-10-15 16:46:03,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:46:03,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:03,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:46:03,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:46:03,662 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-10-15 16:46:04,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:04,684 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-10-15 16:46:04,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:46:04,685 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:46:04,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:04,685 INFO L225 Difference]: With dead ends: 133 [2020-10-15 16:46:04,685 INFO L226 Difference]: Without dead ends: 127 [2020-10-15 16:46:04,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:46:04,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-15 16:46:04,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-10-15 16:46:04,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 16:46:04,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-10-15 16:46:04,688 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-10-15 16:46:04,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:04,688 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-10-15 16:46:04,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:46:04,688 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-10-15 16:46:04,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:04,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:04,689 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:04,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:04,889 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:04,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:04,890 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-10-15 16:46:04,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:04,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796034727] [2020-10-15 16:46:04,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:04,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:05,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796034727] [2020-10-15 16:46:05,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61491393] [2020-10-15 16:46:05,191 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 [2020-10-15 16:46:05,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:46:05,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:05,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:05,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:05,263 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:05,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:05,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:46:05,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841303278] [2020-10-15 16:46:05,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:05,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:05,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:05,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:05,280 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-10-15 16:46:06,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:06,506 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-10-15 16:46:06,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:46:06,507 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:46:06,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:06,507 INFO L225 Difference]: With dead ends: 130 [2020-10-15 16:46:06,508 INFO L226 Difference]: Without dead ends: 124 [2020-10-15 16:46:06,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 16:46:06,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-15 16:46:06,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-10-15 16:46:06,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:46:06,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-15 16:46:06,510 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-10-15 16:46:06,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:06,510 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-15 16:46:06,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:06,510 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-15 16:46:06,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:06,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:06,510 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:06,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:06,711 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:06,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:06,711 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-10-15 16:46:06,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:06,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47419700] [2020-10-15 16:46:06,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:07,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47419700] [2020-10-15 16:46:07,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947485111] [2020-10-15 16:46:07,022 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 [2020-10-15 16:46:07,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 16:46:07,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:07,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:07,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:07,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:07,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:46:07,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498165989] [2020-10-15 16:46:07,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:46:07,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:07,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:46:07,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:46:07,108 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-10-15 16:46:08,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:08,231 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-15 16:46:08,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:46:08,232 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:46:08,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:08,233 INFO L225 Difference]: With dead ends: 131 [2020-10-15 16:46:08,233 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 16:46:08,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 16:46:08,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 16:46:08,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-10-15 16:46:08,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 16:46:08,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-10-15 16:46:08,236 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-10-15 16:46:08,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:08,236 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-10-15 16:46:08,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:46:08,236 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-10-15 16:46:08,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:08,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:08,236 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:08,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-15 16:46:08,437 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:08,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:08,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-10-15 16:46:08,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:08,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667062686] [2020-10-15 16:46:08,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:08,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667062686] [2020-10-15 16:46:08,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825008480] [2020-10-15 16:46:08,738 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 [2020-10-15 16:46:08,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 16:46:08,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:08,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:08,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:08,824 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:08,845 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:08,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:08,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:46:08,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340386533] [2020-10-15 16:46:08,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:08,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:08,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:08,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:08,846 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-10-15 16:46:10,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:10,206 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-10-15 16:46:10,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:46:10,207 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:46:10,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:10,208 INFO L225 Difference]: With dead ends: 128 [2020-10-15 16:46:10,208 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 16:46:10,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 16:46:10,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 16:46:10,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-10-15 16:46:10,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 16:46:10,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-10-15 16:46:10,210 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-10-15 16:46:10,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:10,210 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-10-15 16:46:10,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:10,211 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-10-15 16:46:10,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:10,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:10,211 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:10,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-10-15 16:46:10,412 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:10,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:10,412 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-10-15 16:46:10,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:10,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117196535] [2020-10-15 16:46:10,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:10,715 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:10,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117196535] [2020-10-15 16:46:10,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476916613] [2020-10-15 16:46:10,715 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 [2020-10-15 16:46:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:10,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:10,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:10,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:10,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:46:10,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851598708] [2020-10-15 16:46:10,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:46:10,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:10,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:46:10,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:46:10,790 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-10-15 16:46:11,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:11,980 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-10-15 16:46:11,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:46:11,981 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:46:11,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:11,981 INFO L225 Difference]: With dead ends: 129 [2020-10-15 16:46:11,981 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 16:46:11,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 16:46:11,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 16:46:11,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-10-15 16:46:11,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:46:11,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:46:11,983 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-10-15 16:46:11,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:11,983 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:46:11,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:46:11,983 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:46:11,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:11,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:11,983 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:12,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-15 16:46:12,184 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:12,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:12,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-10-15 16:46:12,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:12,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672722428] [2020-10-15 16:46:12,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:12,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672722428] [2020-10-15 16:46:12,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474219605] [2020-10-15 16:46:12,490 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 [2020-10-15 16:46:12,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:46:12,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:12,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:12,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:12,569 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:12,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:12,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:46:12,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127834390] [2020-10-15 16:46:12,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:12,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:12,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:12,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:12,591 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-10-15 16:46:14,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:14,006 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-10-15 16:46:14,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:46:14,007 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:46:14,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:14,007 INFO L225 Difference]: With dead ends: 126 [2020-10-15 16:46:14,008 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 16:46:14,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 16:46:14,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 16:46:14,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-10-15 16:46:14,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:46:14,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:46:14,010 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-10-15 16:46:14,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:14,010 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:46:14,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:14,010 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:46:14,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:14,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:14,011 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:14,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-15 16:46:14,212 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:14,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:14,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-10-15 16:46:14,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:14,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520604770] [2020-10-15 16:46:14,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:14,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520604770] [2020-10-15 16:46:14,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626220202] [2020-10-15 16:46:14,515 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 [2020-10-15 16:46:14,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 16:46:14,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:14,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:14,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:14,601 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:14,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:14,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:46:14,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974068817] [2020-10-15 16:46:14,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:46:14,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:14,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:46:14,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:46:14,603 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-10-15 16:46:15,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:15,848 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-10-15 16:46:15,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 16:46:15,849 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:46:15,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:15,849 INFO L225 Difference]: With dead ends: 127 [2020-10-15 16:46:15,849 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 16:46:15,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:46:15,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 16:46:15,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-10-15 16:46:15,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-15 16:46:15,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-15 16:46:15,851 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-10-15 16:46:15,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:15,851 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-15 16:46:15,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:46:15,851 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-15 16:46:15,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:15,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:15,852 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:16,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:16,052 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:16,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:16,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-10-15 16:46:16,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:16,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590576369] [2020-10-15 16:46:16,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:16,350 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:16,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590576369] [2020-10-15 16:46:16,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765390830] [2020-10-15 16:46:16,351 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 [2020-10-15 16:46:16,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:46:16,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:16,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:16,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:16,426 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:16,447 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:16,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:16,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:46:16,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690996342] [2020-10-15 16:46:16,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:16,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:16,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:16,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:16,448 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-15 16:46:18,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:18,009 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-10-15 16:46:18,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 16:46:18,010 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:46:18,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:18,011 INFO L225 Difference]: With dead ends: 124 [2020-10-15 16:46:18,011 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 16:46:18,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 16:46:18,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 16:46:18,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-10-15 16:46:18,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 16:46:18,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-15 16:46:18,012 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-10-15 16:46:18,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:18,013 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-15 16:46:18,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:18,013 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-15 16:46:18,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:18,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:18,013 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:18,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-15 16:46:18,216 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:18,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:18,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-10-15 16:46:18,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:18,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722044310] [2020-10-15 16:46:18,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:18,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722044310] [2020-10-15 16:46:18,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035620083] [2020-10-15 16:46:18,519 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 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 [2020-10-15 16:46:18,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 16:46:18,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:18,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:18,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:18,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:18,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:46:18,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602585758] [2020-10-15 16:46:18,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:46:18,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:18,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:46:18,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:46:18,602 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-10-15 16:46:19,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:19,933 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-10-15 16:46:19,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 16:46:19,933 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:46:19,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:19,934 INFO L225 Difference]: With dead ends: 144 [2020-10-15 16:46:19,934 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 16:46:19,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 16:46:19,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 16:46:19,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-10-15 16:46:19,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 16:46:19,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-10-15 16:46:19,938 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-10-15 16:46:19,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:19,938 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-10-15 16:46:19,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:46:19,938 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-10-15 16:46:19,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:19,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:19,939 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:20,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:20,147 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:20,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:20,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-10-15 16:46:20,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:20,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591360060] [2020-10-15 16:46:20,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:20,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:20,454 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:20,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591360060] [2020-10-15 16:46:20,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718988724] [2020-10-15 16:46:20,455 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 [2020-10-15 16:46:20,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 16:46:20,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:20,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:20,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:20,569 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:20,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:20,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:46:20,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454878753] [2020-10-15 16:46:20,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:20,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:20,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:20,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:20,572 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-10-15 16:46:22,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:22,050 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-10-15 16:46:22,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 16:46:22,051 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:46:22,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:22,051 INFO L225 Difference]: With dead ends: 125 [2020-10-15 16:46:22,051 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:46:22,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1106, Invalid=2800, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 16:46:22,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:46:22,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-10-15 16:46:22,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 16:46:22,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-15 16:46:22,053 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-15 16:46:22,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:22,054 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-15 16:46:22,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:22,054 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-15 16:46:22,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:22,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:22,054 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:22,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-10-15 16:46:22,255 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:22,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:22,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-10-15 16:46:22,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:22,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459695915] [2020-10-15 16:46:22,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:22,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:22,685 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:22,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459695915] [2020-10-15 16:46:22,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986044219] [2020-10-15 16:46:22,686 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 [2020-10-15 16:46:22,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:22,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:22,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:22,754 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:22,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:22,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:46:22,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744306633] [2020-10-15 16:46:22,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:22,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:22,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:22,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:22,756 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-10-15 16:46:23,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:23,448 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-10-15 16:46:23,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:46:23,449 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:46:23,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:23,449 INFO L225 Difference]: With dead ends: 144 [2020-10-15 16:46:23,450 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 16:46:23,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:46:23,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 16:46:23,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-10-15 16:46:23,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:46:23,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:46:23,452 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 16:46:23,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:23,452 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:46:23,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:23,452 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:46:23,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:23,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:23,453 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:23,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:23,653 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:23,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:23,654 INFO L82 PathProgramCache]: Analyzing trace with hash 627867998, now seen corresponding path program 218 times [2020-10-15 16:46:23,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:23,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827042031] [2020-10-15 16:46:23,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:24,091 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:24,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827042031] [2020-10-15 16:46:24,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710739170] [2020-10-15 16:46:24,092 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 [2020-10-15 16:46:24,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:46:24,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:24,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:24,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:24,171 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:24,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:24,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:46:24,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809583272] [2020-10-15 16:46:24,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:46:24,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:24,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:46:24,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:46:24,186 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 16:46:24,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:24,942 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2020-10-15 16:46:24,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:46:24,943 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:46:24,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:24,943 INFO L225 Difference]: With dead ends: 141 [2020-10-15 16:46:24,944 INFO L226 Difference]: Without dead ends: 135 [2020-10-15 16:46:24,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=653, Invalid=1603, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:46:24,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-15 16:46:24,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2020-10-15 16:46:24,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:46:24,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:46:24,946 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 16:46:24,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:24,947 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:46:24,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:46:24,947 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:46:24,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:24,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:24,948 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:25,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2020-10-15 16:46:25,148 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:25,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:25,149 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 219 times [2020-10-15 16:46:25,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:25,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832970048] [2020-10-15 16:46:25,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:25,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:25,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832970048] [2020-10-15 16:46:25,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058969821] [2020-10-15 16:46:25,546 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 [2020-10-15 16:46:25,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 16:46:25,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:25,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:25,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:25,615 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:25,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:25,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:46:25,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039594542] [2020-10-15 16:46:25,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:25,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:25,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:25,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:25,616 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 16:46:26,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:26,405 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-10-15 16:46:26,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:46:26,406 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:46:26,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:26,407 INFO L225 Difference]: With dead ends: 138 [2020-10-15 16:46:26,407 INFO L226 Difference]: Without dead ends: 132 [2020-10-15 16:46:26,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=608, Invalid=1554, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 16:46:26,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-15 16:46:26,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-10-15 16:46:26,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:46:26,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:46:26,409 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 16:46:26,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:26,410 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:46:26,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:26,410 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:46:26,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:26,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:26,411 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:26,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:26,611 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:26,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:26,612 INFO L82 PathProgramCache]: Analyzing trace with hash -2104215232, now seen corresponding path program 220 times [2020-10-15 16:46:26,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:26,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2938797] [2020-10-15 16:46:26,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:26,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:27,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2938797] [2020-10-15 16:46:27,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442104959] [2020-10-15 16:46:27,015 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 [2020-10-15 16:46:27,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:46:27,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:27,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:27,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:27,102 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:27,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:27,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:46:27,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704862271] [2020-10-15 16:46:27,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:46:27,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:27,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:46:27,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:46:27,117 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 16:46:28,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:28,045 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-10-15 16:46:28,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:46:28,045 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:46:28,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:28,046 INFO L225 Difference]: With dead ends: 137 [2020-10-15 16:46:28,046 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 16:46:28,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 16:46:28,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 16:46:28,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-10-15 16:46:28,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:46:28,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:46:28,048 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 16:46:28,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:28,049 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:46:28,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:46:28,049 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:46:28,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:28,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:28,049 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:28,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-10-15 16:46:28,250 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:28,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:28,250 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 221 times [2020-10-15 16:46:28,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:28,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631661499] [2020-10-15 16:46:28,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:28,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631661499] [2020-10-15 16:46:28,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20229560] [2020-10-15 16:46:28,643 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 [2020-10-15 16:46:28,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 16:46:28,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:28,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:28,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:28,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:28,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:46:28,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204542255] [2020-10-15 16:46:28,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:28,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:28,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:28,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:28,726 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 16:46:29,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:29,629 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-10-15 16:46:29,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:46:29,630 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:46:29,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:29,631 INFO L225 Difference]: With dead ends: 134 [2020-10-15 16:46:29,631 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 16:46:29,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:46:29,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 16:46:29,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-10-15 16:46:29,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:46:29,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:46:29,633 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 16:46:29,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:29,634 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:46:29,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:29,634 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:46:29,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:29,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:29,634 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:29,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-15 16:46:29,840 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:29,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:29,841 INFO L82 PathProgramCache]: Analyzing trace with hash 78414242, now seen corresponding path program 222 times [2020-10-15 16:46:29,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:29,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582558418] [2020-10-15 16:46:29,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:30,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582558418] [2020-10-15 16:46:30,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809209972] [2020-10-15 16:46:30,212 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 [2020-10-15 16:46:30,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 16:46:30,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:30,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:30,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:30,296 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:30,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:30,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:46:30,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965187446] [2020-10-15 16:46:30,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:46:30,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:30,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:46:30,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:46:30,312 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 16:46:31,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:31,371 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-10-15 16:46:31,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:46:31,372 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:46:31,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:31,372 INFO L225 Difference]: With dead ends: 133 [2020-10-15 16:46:31,373 INFO L226 Difference]: Without dead ends: 127 [2020-10-15 16:46:31,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=693, Invalid=1959, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 16:46:31,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-15 16:46:31,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-10-15 16:46:31,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:46:31,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:46:31,376 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 16:46:31,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:31,376 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:46:31,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:46:31,376 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:46:31,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:31,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:31,377 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:31,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-15 16:46:31,581 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:31,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:31,581 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 223 times [2020-10-15 16:46:31,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:31,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820741575] [2020-10-15 16:46:31,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:31,966 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:31,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820741575] [2020-10-15 16:46:31,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510972267] [2020-10-15 16:46:31,966 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 [2020-10-15 16:46:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:32,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:32,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:32,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:32,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:46:32,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369028126] [2020-10-15 16:46:32,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:32,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:32,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:32,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:32,041 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 16:46:33,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:33,016 INFO L93 Difference]: Finished difference Result 130 states and 311 transitions. [2020-10-15 16:46:33,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:46:33,017 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:46:33,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:33,017 INFO L225 Difference]: With dead ends: 130 [2020-10-15 16:46:33,017 INFO L226 Difference]: Without dead ends: 124 [2020-10-15 16:46:33,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 16:46:33,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-15 16:46:33,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-10-15 16:46:33,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:46:33,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:46:33,021 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 16:46:33,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:33,021 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:46:33,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:33,021 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:46:33,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:33,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:33,022 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:33,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:33,226 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:33,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:33,227 INFO L82 PathProgramCache]: Analyzing trace with hash 2006940292, now seen corresponding path program 224 times [2020-10-15 16:46:33,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:33,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129990458] [2020-10-15 16:46:33,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:33,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129990458] [2020-10-15 16:46:33,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280378402] [2020-10-15 16:46:33,618 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 [2020-10-15 16:46:33,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:46:33,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:33,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:33,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:33,701 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:33,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:33,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:46:33,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157358765] [2020-10-15 16:46:33,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:46:33,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:33,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:46:33,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:46:33,719 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 16:46:34,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:34,917 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-10-15 16:46:34,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:46:34,918 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:46:34,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:34,919 INFO L225 Difference]: With dead ends: 129 [2020-10-15 16:46:34,919 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 16:46:34,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:46:34,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 16:46:34,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-10-15 16:46:34,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:46:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:46:34,922 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 16:46:34,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:34,922 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:46:34,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:46:34,923 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:46:34,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:34,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:34,923 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:35,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-15 16:46:35,124 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:35,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:35,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 225 times [2020-10-15 16:46:35,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:35,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196945896] [2020-10-15 16:46:35,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:35,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196945896] [2020-10-15 16:46:35,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676381358] [2020-10-15 16:46:35,492 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 [2020-10-15 16:46:35,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 16:46:35,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:35,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:35,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:35,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:35,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:46:35,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250599736] [2020-10-15 16:46:35,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:35,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:35,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:35,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:35,566 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 16:46:36,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:36,625 INFO L93 Difference]: Finished difference Result 126 states and 303 transitions. [2020-10-15 16:46:36,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:46:36,626 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:46:36,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:36,627 INFO L225 Difference]: With dead ends: 126 [2020-10-15 16:46:36,627 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 16:46:36,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=719, Invalid=2037, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 16:46:36,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 16:46:36,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2020-10-15 16:46:36,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:46:36,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:46:36,629 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 16:46:36,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:36,630 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:46:36,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:36,630 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:46:36,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:36,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:36,630 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:36,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:36,831 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:36,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:36,831 INFO L82 PathProgramCache]: Analyzing trace with hash -614513690, now seen corresponding path program 226 times [2020-10-15 16:46:36,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:36,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969369953] [2020-10-15 16:46:36,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:37,186 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:37,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969369953] [2020-10-15 16:46:37,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973135222] [2020-10-15 16:46:37,187 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 [2020-10-15 16:46:37,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:46:37,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:37,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:37,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:37,265 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:37,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:37,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:46:37,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004417789] [2020-10-15 16:46:37,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:46:37,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:37,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:46:37,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:46:37,285 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 16:46:38,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:38,593 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-10-15 16:46:38,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:46:38,594 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:46:38,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:38,595 INFO L225 Difference]: With dead ends: 125 [2020-10-15 16:46:38,595 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 16:46:38,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=797, Invalid=2283, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 16:46:38,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 16:46:38,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-10-15 16:46:38,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:46:38,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:46:38,598 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 16:46:38,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:38,598 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:46:38,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:46:38,598 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:46:38,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:38,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:38,598 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:38,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-10-15 16:46:38,801 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:38,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:38,802 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 227 times [2020-10-15 16:46:38,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:38,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625203524] [2020-10-15 16:46:38,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:38,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:39,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625203524] [2020-10-15 16:46:39,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678377078] [2020-10-15 16:46:39,162 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 [2020-10-15 16:46:39,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 16:46:39,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:39,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:39,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:39,240 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:39,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:39,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:46:39,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919069976] [2020-10-15 16:46:39,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:39,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:39,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:39,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:39,241 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 16:46:40,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:40,380 INFO L93 Difference]: Finished difference Result 122 states and 295 transitions. [2020-10-15 16:46:40,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:46:40,381 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:46:40,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:40,382 INFO L225 Difference]: With dead ends: 122 [2020-10-15 16:46:40,382 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 16:46:40,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=788, Invalid=2182, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 16:46:40,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 16:46:40,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-10-15 16:46:40,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:46:40,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:46:40,385 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 16:46:40,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:40,386 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:46:40,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:40,386 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:46:40,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:40,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:40,387 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:40,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:40,591 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:40,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:40,592 INFO L82 PathProgramCache]: Analyzing trace with hash -974783032, now seen corresponding path program 228 times [2020-10-15 16:46:40,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:40,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043319991] [2020-10-15 16:46:40,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:40,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:40,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043319991] [2020-10-15 16:46:40,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442390605] [2020-10-15 16:46:40,952 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 [2020-10-15 16:46:41,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 16:46:41,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:41,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:41,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:41,037 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:41,057 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:41,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:41,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:46:41,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742285653] [2020-10-15 16:46:41,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:46:41,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:41,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:46:41,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:46:41,058 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 16:46:42,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:42,502 INFO L93 Difference]: Finished difference Result 121 states and 293 transitions. [2020-10-15 16:46:42,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:46:42,503 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:46:42,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:42,504 INFO L225 Difference]: With dead ends: 121 [2020-10-15 16:46:42,504 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 16:46:42,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 16:46:42,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 16:46:42,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-10-15 16:46:42,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:46:42,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:46:42,506 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 16:46:42,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:42,506 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:46:42,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:46:42,506 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:46:42,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:42,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:42,506 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:42,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-10-15 16:46:42,707 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:42,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:42,708 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 229 times [2020-10-15 16:46:42,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:42,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601643257] [2020-10-15 16:46:42,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:43,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601643257] [2020-10-15 16:46:43,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902510406] [2020-10-15 16:46:43,049 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 [2020-10-15 16:46:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:43,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:43,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:43,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:43,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:46:43,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115477160] [2020-10-15 16:46:43,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:43,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:43,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:43,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:43,120 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 16:46:44,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:44,329 INFO L93 Difference]: Finished difference Result 118 states and 287 transitions. [2020-10-15 16:46:44,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:46:44,330 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:46:44,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:44,331 INFO L225 Difference]: With dead ends: 118 [2020-10-15 16:46:44,331 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 16:46:44,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 16:46:44,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 16:46:44,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-10-15 16:46:44,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:46:44,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:46:44,333 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 16:46:44,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:44,334 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:46:44,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:44,334 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:46:44,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:44,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:44,334 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:44,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:44,535 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:44,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:44,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1161152554, now seen corresponding path program 230 times [2020-10-15 16:46:44,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:44,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258882433] [2020-10-15 16:46:44,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:44,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258882433] [2020-10-15 16:46:44,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641548224] [2020-10-15 16:46:44,883 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 [2020-10-15 16:46:44,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:46:44,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:44,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:44,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:44,959 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:44,979 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:44,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:44,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:46:44,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968718447] [2020-10-15 16:46:44,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:46:44,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:44,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:46:44,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:46:44,981 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 16:46:46,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:46,532 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-10-15 16:46:46,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:46:46,536 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:46:46,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:46,536 INFO L225 Difference]: With dead ends: 117 [2020-10-15 16:46:46,536 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 16:46:46,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=965, Invalid=2575, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:46:46,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 16:46:46,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-10-15 16:46:46,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:46:46,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:46:46,538 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 16:46:46,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:46,538 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:46:46,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:46:46,538 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:46:46,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:46,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:46,539 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:46,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:46,740 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:46,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:46,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 231 times [2020-10-15 16:46:46,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:46,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370610035] [2020-10-15 16:46:46,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:47,072 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:47,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370610035] [2020-10-15 16:46:47,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295263545] [2020-10-15 16:46:47,073 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 [2020-10-15 16:46:47,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 16:46:47,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:47,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:47,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:47,152 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:47,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:47,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:46:47,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79362143] [2020-10-15 16:46:47,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:47,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:47,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:47,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:47,153 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 16:46:48,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:48,462 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-10-15 16:46:48,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:46:48,463 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:46:48,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:48,463 INFO L225 Difference]: With dead ends: 114 [2020-10-15 16:46:48,464 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 16:46:48,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 16:46:48,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 16:46:48,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-10-15 16:46:48,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:46:48,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:46:48,466 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 16:46:48,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:48,467 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:46:48,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:48,467 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:46:48,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:48,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:48,467 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:48,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-15 16:46:48,668 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:48,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:48,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1096336140, now seen corresponding path program 232 times [2020-10-15 16:46:48,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:48,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903711698] [2020-10-15 16:46:48,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:49,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903711698] [2020-10-15 16:46:49,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533293450] [2020-10-15 16:46:49,010 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 [2020-10-15 16:46:49,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:46:49,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:49,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:49,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:49,094 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:49,115 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:49,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:49,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:46:49,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475651557] [2020-10-15 16:46:49,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:46:49,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:49,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:46:49,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:46:49,116 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 16:46:50,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:50,761 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-15 16:46:50,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 16:46:50,762 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:46:50,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:50,762 INFO L225 Difference]: With dead ends: 113 [2020-10-15 16:46:50,762 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 16:46:50,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1073, Invalid=2709, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 16:46:50,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 16:46:50,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-10-15 16:46:50,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:46:50,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:46:50,765 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 16:46:50,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:50,765 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:46:50,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:46:50,766 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:46:50,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:50,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:50,766 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:50,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-15 16:46:50,967 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:50,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:50,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 233 times [2020-10-15 16:46:50,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:50,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194625379] [2020-10-15 16:46:50,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:51,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194625379] [2020-10-15 16:46:51,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797867826] [2020-10-15 16:46:51,298 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 [2020-10-15 16:46:51,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 16:46:51,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:51,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:51,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:51,378 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:51,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:51,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:46:51,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504003930] [2020-10-15 16:46:51,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:51,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:51,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:51,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:51,379 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 16:46:52,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:52,761 INFO L93 Difference]: Finished difference Result 110 states and 271 transitions. [2020-10-15 16:46:52,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 16:46:52,762 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:46:52,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:52,763 INFO L225 Difference]: With dead ends: 110 [2020-10-15 16:46:52,763 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 16:46:52,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1091, Invalid=2569, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 16:46:52,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 16:46:52,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-10-15 16:46:52,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:46:52,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:46:52,765 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 16:46:52,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:52,765 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:46:52,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:52,766 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:46:52,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:52,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:52,766 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:52,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-10-15 16:46:52,967 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:52,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:52,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1583418990, now seen corresponding path program 234 times [2020-10-15 16:46:52,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:52,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685660989] [2020-10-15 16:46:52,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:53,300 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:53,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685660989] [2020-10-15 16:46:53,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141365910] [2020-10-15 16:46:53,301 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 [2020-10-15 16:46:53,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 16:46:53,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:53,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:53,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:53,405 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:53,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:53,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:46:53,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093682593] [2020-10-15 16:46:53,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:46:53,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:53,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:46:53,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:46:53,437 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 16:46:55,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:55,268 INFO L93 Difference]: Finished difference Result 109 states and 269 transitions. [2020-10-15 16:46:55,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 16:46:55,269 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:46:55,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:55,269 INFO L225 Difference]: With dead ends: 109 [2020-10-15 16:46:55,270 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 16:46:55,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1197, Invalid=2835, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 16:46:55,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 16:46:55,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-10-15 16:46:55,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:46:55,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:46:55,272 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 16:46:55,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:55,273 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:46:55,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:46:55,273 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:46:55,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:55,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:55,273 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:55,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-10-15 16:46:55,474 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:55,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:55,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 235 times [2020-10-15 16:46:55,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:55,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516178378] [2020-10-15 16:46:55,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:55,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:55,824 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:55,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516178378] [2020-10-15 16:46:55,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714150952] [2020-10-15 16:46:55,825 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 [2020-10-15 16:46:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:55,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:55,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:55,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:55,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:46:55,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701670680] [2020-10-15 16:46:55,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:55,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:55,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:55,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:55,907 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 16:46:57,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:57,416 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-10-15 16:46:57,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 16:46:57,417 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:46:57,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:57,418 INFO L225 Difference]: With dead ends: 125 [2020-10-15 16:46:57,418 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 16:46:57,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1224, Invalid=2682, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 16:46:57,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 16:46:57,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2020-10-15 16:46:57,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 16:46:57,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 249 transitions. [2020-10-15 16:46:57,421 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 249 transitions. Word has length 28 [2020-10-15 16:46:57,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:57,421 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 249 transitions. [2020-10-15 16:46:57,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:57,421 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 249 transitions. [2020-10-15 16:46:57,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:57,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:57,421 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:57,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-10-15 16:46:57,622 INFO L429 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:57,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:57,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1583925840, now seen corresponding path program 236 times [2020-10-15 16:46:57,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:57,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705976674] [2020-10-15 16:46:57,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:57,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:57,987 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:57,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705976674] [2020-10-15 16:46:57,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308624899] [2020-10-15 16:46:57,988 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 [2020-10-15 16:46:58,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:46:58,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:58,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:46:58,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:58,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:58,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:46:58,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434855224] [2020-10-15 16:46:58,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:46:58,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:58,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:46:58,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:46:58,109 INFO L87 Difference]: Start difference. First operand 96 states and 249 transitions. Second operand 25 states. [2020-10-15 16:46:59,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:59,763 INFO L93 Difference]: Finished difference Result 104 states and 261 transitions. [2020-10-15 16:46:59,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 16:46:59,764 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:46:59,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:59,764 INFO L225 Difference]: With dead ends: 104 [2020-10-15 16:46:59,764 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 16:46:59,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1121, Invalid=2911, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 16:46:59,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 16:46:59,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 69. [2020-10-15 16:46:59,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:46:59,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 168 transitions. [2020-10-15 16:46:59,766 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 168 transitions. Word has length 28 [2020-10-15 16:46:59,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:59,766 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 168 transitions. [2020-10-15 16:46:59,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:46:59,766 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 168 transitions. [2020-10-15 16:46:59,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:59,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:59,767 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:59,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:59,967 INFO L429 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:59,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:59,968 INFO L82 PathProgramCache]: Analyzing trace with hash 234390510, now seen corresponding path program 237 times [2020-10-15 16:46:59,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:59,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35617285] [2020-10-15 16:46:59,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:00,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35617285] [2020-10-15 16:47:00,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434981057] [2020-10-15 16:47:00,314 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 [2020-10-15 16:47:00,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 16:47:00,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:00,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:47:00,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:00,403 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:47:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:00,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:00,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:47:00,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346145048] [2020-10-15 16:47:00,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:47:00,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:00,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:47:00,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:47:00,437 INFO L87 Difference]: Start difference. First operand 69 states and 168 transitions. Second operand 25 states. [2020-10-15 16:47:02,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:02,163 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-10-15 16:47:02,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 16:47:02,164 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:47:02,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:02,164 INFO L225 Difference]: With dead ends: 124 [2020-10-15 16:47:02,164 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 16:47:02,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 16:47:02,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 16:47:02,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2020-10-15 16:47:02,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 16:47:02,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-10-15 16:47:02,167 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 28 [2020-10-15 16:47:02,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:02,167 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-10-15 16:47:02,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:47:02,167 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-10-15 16:47:02,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:02,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:02,168 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:02,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-10-15 16:47:02,368 INFO L429 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:02,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:02,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1857077091, now seen corresponding path program 238 times [2020-10-15 16:47:02,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:02,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75823583] [2020-10-15 16:47:02,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:02,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75823583] [2020-10-15 16:47:02,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606169071] [2020-10-15 16:47:02,752 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 [2020-10-15 16:47:02,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:47:02,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:02,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:02,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:02,840 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:47:02,872 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:02,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:02,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 16:47:02,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639142152] [2020-10-15 16:47:02,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:47:02,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:02,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:47:02,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:47:02,873 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 26 states. [2020-10-15 16:47:04,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:04,743 INFO L93 Difference]: Finished difference Result 102 states and 261 transitions. [2020-10-15 16:47:04,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 16:47:04,744 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 16:47:04,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:04,744 INFO L225 Difference]: With dead ends: 102 [2020-10-15 16:47:04,745 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 16:47:04,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1409, Invalid=3013, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 16:47:04,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 16:47:04,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2020-10-15 16:47:04,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 16:47:04,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2020-10-15 16:47:04,747 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 29 [2020-10-15 16:47:04,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:04,747 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2020-10-15 16:47:04,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:47:04,747 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2020-10-15 16:47:04,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:04,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:04,748 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:04,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:47:04,948 INFO L429 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:04,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:04,949 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 239 times [2020-10-15 16:47:04,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:04,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420038465] [2020-10-15 16:47:04,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:04,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:05,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420038465] [2020-10-15 16:47:05,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990709023] [2020-10-15 16:47:05,411 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 [2020-10-15 16:47:05,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 16:47:05,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:05,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:05,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:05,484 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:05,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:05,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 16:47:05,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022945875] [2020-10-15 16:47:05,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:47:05,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:05,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:47:05,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:47:05,485 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand 25 states. [2020-10-15 16:47:06,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:06,199 INFO L93 Difference]: Finished difference Result 108 states and 251 transitions. [2020-10-15 16:47:06,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:47:06,200 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 16:47:06,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:06,200 INFO L225 Difference]: With dead ends: 108 [2020-10-15 16:47:06,200 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 16:47:06,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=663, Invalid=1407, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 16:47:06,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 16:47:06,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 78. [2020-10-15 16:47:06,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 16:47:06,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-10-15 16:47:06,203 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 29 [2020-10-15 16:47:06,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:06,203 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-10-15 16:47:06,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:47:06,204 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-10-15 16:47:06,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:06,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:06,204 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:06,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:47:06,412 INFO L429 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:06,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:06,412 INFO L82 PathProgramCache]: Analyzing trace with hash -972903182, now seen corresponding path program 240 times [2020-10-15 16:47:06,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:06,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057669209] [2020-10-15 16:47:06,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:06,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057669209] [2020-10-15 16:47:06,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804112396] [2020-10-15 16:47:06,889 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 [2020-10-15 16:47:06,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 16:47:06,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:06,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:06,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:06,977 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:47:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:06,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:06,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 16:47:06,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492240950] [2020-10-15 16:47:06,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:47:06,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:06,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:47:06,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:47:06,991 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 26 states. [2020-10-15 16:47:07,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:07,777 INFO L93 Difference]: Finished difference Result 130 states and 295 transitions. [2020-10-15 16:47:07,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:47:07,778 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 16:47:07,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:07,779 INFO L225 Difference]: With dead ends: 130 [2020-10-15 16:47:07,779 INFO L226 Difference]: Without dead ends: 124 [2020-10-15 16:47:07,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=672, Invalid=1584, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:47:07,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-15 16:47:07,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 76. [2020-10-15 16:47:07,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 16:47:07,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 187 transitions. [2020-10-15 16:47:07,781 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 187 transitions. Word has length 29 [2020-10-15 16:47:07,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:07,782 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 187 transitions. [2020-10-15 16:47:07,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:47:07,782 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 187 transitions. [2020-10-15 16:47:07,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:07,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:07,782 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:07,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:47:07,983 INFO L429 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:07,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:07,983 INFO L82 PathProgramCache]: Analyzing trace with hash -558119952, now seen corresponding path program 241 times [2020-10-15 16:47:07,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:07,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163755989] [2020-10-15 16:47:07,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:07,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:08,463 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:08,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163755989] [2020-10-15 16:47:08,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59577739] [2020-10-15 16:47:08,463 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 [2020-10-15 16:47:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:08,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:08,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:08,524 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:08,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:08,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 16:47:08,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832315840] [2020-10-15 16:47:08,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:47:08,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:08,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:47:08,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:47:08,526 INFO L87 Difference]: Start difference. First operand 76 states and 187 transitions. Second operand 25 states. [2020-10-15 16:47:09,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:09,488 INFO L93 Difference]: Finished difference Result 131 states and 299 transitions. [2020-10-15 16:47:09,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:47:09,490 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 16:47:09,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:09,490 INFO L225 Difference]: With dead ends: 131 [2020-10-15 16:47:09,491 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 16:47:09,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=674, Invalid=1678, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:47:09,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 16:47:09,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 79. [2020-10-15 16:47:09,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 16:47:09,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 195 transitions. [2020-10-15 16:47:09,493 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 195 transitions. Word has length 29 [2020-10-15 16:47:09,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:09,494 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 195 transitions. [2020-10-15 16:47:09,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:47:09,494 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 195 transitions. [2020-10-15 16:47:09,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:09,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:09,494 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:09,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:47:09,695 INFO L429 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:09,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:09,696 INFO L82 PathProgramCache]: Analyzing trace with hash 2015097940, now seen corresponding path program 242 times [2020-10-15 16:47:09,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:09,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998731592] [2020-10-15 16:47:09,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:09,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:10,199 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:10,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998731592] [2020-10-15 16:47:10,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552416538] [2020-10-15 16:47:10,200 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 [2020-10-15 16:47:10,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:47:10,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:10,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:10,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:10,279 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:47:10,293 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:10,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:10,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 16:47:10,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687454034] [2020-10-15 16:47:10,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:47:10,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:10,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:47:10,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:47:10,294 INFO L87 Difference]: Start difference. First operand 79 states and 195 transitions. Second operand 26 states. [2020-10-15 16:47:11,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:11,268 INFO L93 Difference]: Finished difference Result 149 states and 335 transitions. [2020-10-15 16:47:11,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:47:11,269 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 16:47:11,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:11,270 INFO L225 Difference]: With dead ends: 149 [2020-10-15 16:47:11,270 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 16:47:11,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=712, Invalid=1838, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 16:47:11,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 16:47:11,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 78. [2020-10-15 16:47:11,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 16:47:11,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 193 transitions. [2020-10-15 16:47:11,272 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 193 transitions. Word has length 29 [2020-10-15 16:47:11,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:11,273 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 193 transitions. [2020-10-15 16:47:11,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:47:11,273 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 193 transitions. [2020-10-15 16:47:11,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:11,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:11,273 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:11,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-10-15 16:47:11,474 INFO L429 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:11,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:11,474 INFO L82 PathProgramCache]: Analyzing trace with hash 831173330, now seen corresponding path program 243 times [2020-10-15 16:47:11,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:11,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790904916] [2020-10-15 16:47:11,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:11,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790904916] [2020-10-15 16:47:11,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190961719] [2020-10-15 16:47:11,942 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 [2020-10-15 16:47:11,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 16:47:11,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:12,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:12,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:12,015 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:12,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:12,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 16:47:12,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344963086] [2020-10-15 16:47:12,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:47:12,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:12,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:47:12,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:47:12,017 INFO L87 Difference]: Start difference. First operand 78 states and 193 transitions. Second operand 25 states. [2020-10-15 16:47:13,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:13,014 INFO L93 Difference]: Finished difference Result 149 states and 337 transitions. [2020-10-15 16:47:13,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:47:13,016 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 16:47:13,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:13,016 INFO L225 Difference]: With dead ends: 149 [2020-10-15 16:47:13,016 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 16:47:13,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=728, Invalid=1924, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 16:47:13,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 16:47:13,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 81. [2020-10-15 16:47:13,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:47:13,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 201 transitions. [2020-10-15 16:47:13,020 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 201 transitions. Word has length 29 [2020-10-15 16:47:13,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:13,020 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 201 transitions. [2020-10-15 16:47:13,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:47:13,021 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 201 transitions. [2020-10-15 16:47:13,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:13,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:13,021 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:13,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2020-10-15 16:47:13,229 INFO L429 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:13,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:13,230 INFO L82 PathProgramCache]: Analyzing trace with hash -716985290, now seen corresponding path program 244 times [2020-10-15 16:47:13,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:13,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452943578] [2020-10-15 16:47:13,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:13,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452943578] [2020-10-15 16:47:13,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070747748] [2020-10-15 16:47:13,777 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 [2020-10-15 16:47:13,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:47:13,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:13,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:13,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:13,857 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:47:13,875 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:13,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:13,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 16:47:13,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998351090] [2020-10-15 16:47:13,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:47:13,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:13,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:47:13,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:47:13,877 INFO L87 Difference]: Start difference. First operand 81 states and 201 transitions. Second operand 26 states. [2020-10-15 16:47:15,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:15,023 INFO L93 Difference]: Finished difference Result 146 states and 331 transitions. [2020-10-15 16:47:15,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:47:15,024 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 16:47:15,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:15,024 INFO L225 Difference]: With dead ends: 146 [2020-10-15 16:47:15,024 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 16:47:15,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=731, Invalid=2025, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 16:47:15,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 16:47:15,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 80. [2020-10-15 16:47:15,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:47:15,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 199 transitions. [2020-10-15 16:47:15,027 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 199 transitions. Word has length 29 [2020-10-15 16:47:15,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:15,027 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 199 transitions. [2020-10-15 16:47:15,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:47:15,027 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 199 transitions. [2020-10-15 16:47:15,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:15,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:15,028 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:15,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-10-15 16:47:15,228 INFO L429 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:15,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:15,229 INFO L82 PathProgramCache]: Analyzing trace with hash -2018774476, now seen corresponding path program 245 times [2020-10-15 16:47:15,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:15,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742650159] [2020-10-15 16:47:15,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:15,693 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:15,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742650159] [2020-10-15 16:47:15,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110653389] [2020-10-15 16:47:15,694 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 [2020-10-15 16:47:15,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 16:47:15,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:15,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:15,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:15,774 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:15,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:15,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 16:47:15,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922444557] [2020-10-15 16:47:15,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:47:15,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:15,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:47:15,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:47:15,775 INFO L87 Difference]: Start difference. First operand 80 states and 199 transitions. Second operand 25 states. [2020-10-15 16:47:16,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:16,836 INFO L93 Difference]: Finished difference Result 147 states and 335 transitions. [2020-10-15 16:47:16,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:47:16,837 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 16:47:16,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:16,837 INFO L225 Difference]: With dead ends: 147 [2020-10-15 16:47:16,837 INFO L226 Difference]: Without dead ends: 141 [2020-10-15 16:47:16,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=762, Invalid=2100, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:47:16,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-15 16:47:16,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 83. [2020-10-15 16:47:16,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 16:47:16,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 207 transitions. [2020-10-15 16:47:16,840 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 207 transitions. Word has length 29 [2020-10-15 16:47:16,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:16,840 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 207 transitions. [2020-10-15 16:47:16,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:47:16,840 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 207 transitions. [2020-10-15 16:47:16,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:16,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:16,840 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:17,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-10-15 16:47:17,041 INFO L429 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:17,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:17,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1465644184, now seen corresponding path program 246 times [2020-10-15 16:47:17,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:17,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367873237] [2020-10-15 16:47:17,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:17,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:17,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367873237] [2020-10-15 16:47:17,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561140549] [2020-10-15 16:47:17,482 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 [2020-10-15 16:47:17,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 16:47:17,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:17,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:17,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:17,580 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:47:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:17,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:17,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 16:47:17,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147362054] [2020-10-15 16:47:17,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:47:17,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:17,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:47:17,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:47:17,598 INFO L87 Difference]: Start difference. First operand 83 states and 207 transitions. Second operand 26 states. [2020-10-15 16:47:18,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:18,814 INFO L93 Difference]: Finished difference Result 144 states and 329 transitions. [2020-10-15 16:47:18,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:47:18,814 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 16:47:18,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:18,815 INFO L225 Difference]: With dead ends: 144 [2020-10-15 16:47:18,815 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 16:47:18,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=766, Invalid=2204, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 16:47:18,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 16:47:18,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 82. [2020-10-15 16:47:18,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:47:18,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 205 transitions. [2020-10-15 16:47:18,817 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 205 transitions. Word has length 29 [2020-10-15 16:47:18,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:18,818 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 205 transitions. [2020-10-15 16:47:18,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:47:18,818 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 205 transitions. [2020-10-15 16:47:18,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:18,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:18,818 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:19,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:47:19,019 INFO L429 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:19,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:19,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1517920790, now seen corresponding path program 247 times [2020-10-15 16:47:19,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:19,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123220981] [2020-10-15 16:47:19,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:19,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123220981] [2020-10-15 16:47:19,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029335881] [2020-10-15 16:47:19,435 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 [2020-10-15 16:47:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:19,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:19,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:19,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:19,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 16:47:19,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334823907] [2020-10-15 16:47:19,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:47:19,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:19,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:47:19,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:47:19,510 INFO L87 Difference]: Start difference. First operand 82 states and 205 transitions. Second operand 25 states. [2020-10-15 16:47:20,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:20,646 INFO L93 Difference]: Finished difference Result 145 states and 333 transitions. [2020-10-15 16:47:20,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:47:20,647 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 16:47:20,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:20,647 INFO L225 Difference]: With dead ends: 145 [2020-10-15 16:47:20,647 INFO L226 Difference]: Without dead ends: 139 [2020-10-15 16:47:20,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=812, Invalid=2268, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 16:47:20,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-15 16:47:20,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 85. [2020-10-15 16:47:20,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 16:47:20,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 213 transitions. [2020-10-15 16:47:20,649 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 213 transitions. Word has length 29 [2020-10-15 16:47:20,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:20,650 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 213 transitions. [2020-10-15 16:47:20,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:47:20,650 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 213 transitions. [2020-10-15 16:47:20,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:20,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:20,650 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:20,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2020-10-15 16:47:20,859 INFO L429 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:20,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:20,859 INFO L82 PathProgramCache]: Analyzing trace with hash -900797062, now seen corresponding path program 248 times [2020-10-15 16:47:20,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:20,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278289676] [2020-10-15 16:47:20,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:20,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:21,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278289676] [2020-10-15 16:47:21,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602144517] [2020-10-15 16:47:21,277 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 [2020-10-15 16:47:21,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:47:21,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:21,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:21,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:21,359 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:47:21,384 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:21,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:21,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 16:47:21,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588494693] [2020-10-15 16:47:21,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:47:21,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:21,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:47:21,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:47:21,385 INFO L87 Difference]: Start difference. First operand 85 states and 213 transitions. Second operand 26 states. [2020-10-15 16:47:22,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:22,709 INFO L93 Difference]: Finished difference Result 142 states and 327 transitions. [2020-10-15 16:47:22,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:47:22,710 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 16:47:22,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:22,710 INFO L225 Difference]: With dead ends: 142 [2020-10-15 16:47:22,711 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 16:47:22,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=817, Invalid=2375, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 16:47:22,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 16:47:22,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-10-15 16:47:22,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 16:47:22,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 211 transitions. [2020-10-15 16:47:22,713 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 211 transitions. Word has length 29 [2020-10-15 16:47:22,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:22,713 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 211 transitions. [2020-10-15 16:47:22,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:47:22,713 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 211 transitions. [2020-10-15 16:47:22,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:22,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:22,714 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:22,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:47:22,915 INFO L429 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:22,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:22,915 INFO L82 PathProgramCache]: Analyzing trace with hash -212475272, now seen corresponding path program 249 times [2020-10-15 16:47:22,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:22,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557230083] [2020-10-15 16:47:22,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:23,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557230083] [2020-10-15 16:47:23,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015724388] [2020-10-15 16:47:23,319 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 [2020-10-15 16:47:23,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 16:47:23,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:23,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:23,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:23,407 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:23,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:23,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 16:47:23,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082744715] [2020-10-15 16:47:23,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:47:23,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:23,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:47:23,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:47:23,408 INFO L87 Difference]: Start difference. First operand 84 states and 211 transitions. Second operand 25 states. [2020-10-15 16:47:24,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:24,631 INFO L93 Difference]: Finished difference Result 143 states and 331 transitions. [2020-10-15 16:47:24,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:47:24,632 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 16:47:24,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:24,632 INFO L225 Difference]: With dead ends: 143 [2020-10-15 16:47:24,632 INFO L226 Difference]: Without dead ends: 137 [2020-10-15 16:47:24,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=878, Invalid=2428, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 16:47:24,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-15 16:47:24,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 87. [2020-10-15 16:47:24,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:47:24,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 219 transitions. [2020-10-15 16:47:24,634 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 219 transitions. Word has length 29 [2020-10-15 16:47:24,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:24,634 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 219 transitions. [2020-10-15 16:47:24,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:47:24,634 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 219 transitions. [2020-10-15 16:47:24,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:24,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:24,635 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:24,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:47:24,835 INFO L429 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:24,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:24,836 INFO L82 PathProgramCache]: Analyzing trace with hash 772716252, now seen corresponding path program 250 times [2020-10-15 16:47:24,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:24,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727768973] [2020-10-15 16:47:24,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:24,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:25,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727768973] [2020-10-15 16:47:25,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656658499] [2020-10-15 16:47:25,241 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 [2020-10-15 16:47:25,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:47:25,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:25,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:25,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:25,327 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:47:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:25,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:25,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 16:47:25,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740688401] [2020-10-15 16:47:25,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:47:25,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:25,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:47:25,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:47:25,348 INFO L87 Difference]: Start difference. First operand 87 states and 219 transitions. Second operand 26 states. [2020-10-15 16:47:26,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:26,798 INFO L93 Difference]: Finished difference Result 140 states and 325 transitions. [2020-10-15 16:47:26,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:47:26,799 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 16:47:26,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:26,800 INFO L225 Difference]: With dead ends: 140 [2020-10-15 16:47:26,800 INFO L226 Difference]: Without dead ends: 134 [2020-10-15 16:47:26,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=884, Invalid=2538, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 16:47:26,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-15 16:47:26,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 86. [2020-10-15 16:47:26,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:47:26,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 217 transitions. [2020-10-15 16:47:26,802 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 217 transitions. Word has length 29 [2020-10-15 16:47:26,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:26,802 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 217 transitions. [2020-10-15 16:47:26,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:47:26,802 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 217 transitions. [2020-10-15 16:47:26,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:26,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:26,802 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:27,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:47:27,003 INFO L429 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:27,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:27,004 INFO L82 PathProgramCache]: Analyzing trace with hash -844442790, now seen corresponding path program 251 times [2020-10-15 16:47:27,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:27,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138774980] [2020-10-15 16:47:27,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:27,395 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:27,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138774980] [2020-10-15 16:47:27,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573949177] [2020-10-15 16:47:27,395 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 [2020-10-15 16:47:27,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 16:47:27,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:27,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:27,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:27,481 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:27,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:27,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 16:47:27,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734656992] [2020-10-15 16:47:27,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:47:27,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:27,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:47:27,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:47:27,482 INFO L87 Difference]: Start difference. First operand 86 states and 217 transitions. Second operand 25 states. [2020-10-15 16:47:28,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:28,782 INFO L93 Difference]: Finished difference Result 141 states and 329 transitions. [2020-10-15 16:47:28,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:47:28,783 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 16:47:28,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:28,783 INFO L225 Difference]: With dead ends: 141 [2020-10-15 16:47:28,783 INFO L226 Difference]: Without dead ends: 135 [2020-10-15 16:47:28,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=960, Invalid=2580, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:47:28,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-15 16:47:28,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 89. [2020-10-15 16:47:28,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-15 16:47:28,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 225 transitions. [2020-10-15 16:47:28,785 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 225 transitions. Word has length 29 [2020-10-15 16:47:28,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:28,785 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 225 transitions. [2020-10-15 16:47:28,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:47:28,785 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 225 transitions. [2020-10-15 16:47:28,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:28,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:28,785 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:28,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:47:28,987 INFO L429 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:28,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:28,987 INFO L82 PathProgramCache]: Analyzing trace with hash 412446910, now seen corresponding path program 252 times [2020-10-15 16:47:28,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:28,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971447829] [2020-10-15 16:47:28,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:28,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:29,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971447829] [2020-10-15 16:47:29,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016475917] [2020-10-15 16:47:29,387 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 [2020-10-15 16:47:29,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 16:47:29,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:29,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:29,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:29,475 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:47:29,496 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:29,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:29,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 16:47:29,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666335904] [2020-10-15 16:47:29,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:47:29,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:29,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:47:29,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:47:29,497 INFO L87 Difference]: Start difference. First operand 89 states and 225 transitions. Second operand 26 states. [2020-10-15 16:47:31,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:31,056 INFO L93 Difference]: Finished difference Result 138 states and 323 transitions. [2020-10-15 16:47:31,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:47:31,057 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 16:47:31,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:31,057 INFO L225 Difference]: With dead ends: 138 [2020-10-15 16:47:31,057 INFO L226 Difference]: Without dead ends: 132 [2020-10-15 16:47:31,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=967, Invalid=2693, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 16:47:31,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-15 16:47:31,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 88. [2020-10-15 16:47:31,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 16:47:31,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-10-15 16:47:31,060 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 29 [2020-10-15 16:47:31,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:31,060 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-10-15 16:47:31,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:47:31,061 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-10-15 16:47:31,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:31,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:31,061 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:31,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:47:31,262 INFO L429 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:31,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:31,262 INFO L82 PathProgramCache]: Analyzing trace with hash 2028639420, now seen corresponding path program 253 times [2020-10-15 16:47:31,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:31,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393554918] [2020-10-15 16:47:31,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:31,656 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:31,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393554918] [2020-10-15 16:47:31,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671873366] [2020-10-15 16:47:31,657 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 [2020-10-15 16:47:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:31,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:31,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:31,741 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:31,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:31,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 16:47:31,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281948755] [2020-10-15 16:47:31,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:47:31,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:31,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:47:31,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:47:31,742 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 25 states. [2020-10-15 16:47:33,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:33,157 INFO L93 Difference]: Finished difference Result 139 states and 327 transitions. [2020-10-15 16:47:33,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 16:47:33,158 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 16:47:33,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:33,158 INFO L225 Difference]: With dead ends: 139 [2020-10-15 16:47:33,158 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 16:47:33,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1058, Invalid=2724, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 16:47:33,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 16:47:33,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 91. [2020-10-15 16:47:33,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 16:47:33,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 231 transitions. [2020-10-15 16:47:33,161 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 231 transitions. Word has length 29 [2020-10-15 16:47:33,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:33,161 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 231 transitions. [2020-10-15 16:47:33,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:47:33,161 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 231 transitions. [2020-10-15 16:47:33,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:33,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:33,162 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:33,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2020-10-15 16:47:33,369 INFO L429 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:33,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:33,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1746584800, now seen corresponding path program 254 times [2020-10-15 16:47:33,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:33,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185322297] [2020-10-15 16:47:33,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:33,760 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:33,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185322297] [2020-10-15 16:47:33,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212152411] [2020-10-15 16:47:33,762 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 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 [2020-10-15 16:47:33,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:47:33,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:33,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:33,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:33,848 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:47:33,870 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:33,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:33,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 16:47:33,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076952213] [2020-10-15 16:47:33,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:47:33,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:33,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:47:33,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:47:33,872 INFO L87 Difference]: Start difference. First operand 91 states and 231 transitions. Second operand 26 states. [2020-10-15 16:47:35,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:35,565 INFO L93 Difference]: Finished difference Result 136 states and 321 transitions. [2020-10-15 16:47:35,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 16:47:35,567 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 16:47:35,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:35,568 INFO L225 Difference]: With dead ends: 136 [2020-10-15 16:47:35,568 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 16:47:35,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1066, Invalid=2840, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 16:47:35,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 16:47:35,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 90. [2020-10-15 16:47:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 16:47:35,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 229 transitions. [2020-10-15 16:47:35,570 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 229 transitions. Word has length 29 [2020-10-15 16:47:35,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:35,571 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 229 transitions. [2020-10-15 16:47:35,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:47:35,571 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 229 transitions. [2020-10-15 16:47:35,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:35,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:35,572 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:35,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-10-15 16:47:35,777 INFO L429 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:35,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:35,778 INFO L82 PathProgramCache]: Analyzing trace with hash -91273570, now seen corresponding path program 255 times [2020-10-15 16:47:35,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:35,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135128560] [2020-10-15 16:47:35,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:36,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135128560] [2020-10-15 16:47:36,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039923356] [2020-10-15 16:47:36,169 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 [2020-10-15 16:47:36,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 16:47:36,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:36,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:36,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:36,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:36,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 16:47:36,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944652642] [2020-10-15 16:47:36,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:47:36,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:36,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:47:36,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:47:36,255 INFO L87 Difference]: Start difference. First operand 90 states and 229 transitions. Second operand 25 states. [2020-10-15 16:47:37,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:37,716 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-10-15 16:47:37,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 16:47:37,717 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 16:47:37,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:37,717 INFO L225 Difference]: With dead ends: 137 [2020-10-15 16:47:37,718 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 16:47:37,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1172, Invalid=2860, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 16:47:37,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 16:47:37,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2020-10-15 16:47:37,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:47:37,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:47:37,720 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 29 [2020-10-15 16:47:37,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:37,721 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:47:37,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:47:37,721 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:47:37,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:37,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:37,721 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:37,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-10-15 16:47:37,922 INFO L429 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:37,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:37,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1811401214, now seen corresponding path program 256 times [2020-10-15 16:47:37,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:37,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096672728] [2020-10-15 16:47:37,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:38,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096672728] [2020-10-15 16:47:38,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243925060] [2020-10-15 16:47:38,307 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 [2020-10-15 16:47:38,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:47:38,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:38,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:38,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:38,406 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:47:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:38,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:38,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 16:47:38,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501669187] [2020-10-15 16:47:38,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:47:38,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:38,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:47:38,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:47:38,434 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 26 states. [2020-10-15 16:47:40,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:40,254 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-10-15 16:47:40,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 16:47:40,255 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 16:47:40,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:40,256 INFO L225 Difference]: With dead ends: 134 [2020-10-15 16:47:40,256 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 16:47:40,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1181, Invalid=2979, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 16:47:40,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 16:47:40,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 92. [2020-10-15 16:47:40,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:47:40,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:47:40,258 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 29 [2020-10-15 16:47:40,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:40,259 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:47:40,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:47:40,259 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:47:40,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:40,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:40,259 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:40,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:47:40,460 INFO L429 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:40,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:40,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1340405504, now seen corresponding path program 257 times [2020-10-15 16:47:40,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:40,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100433302] [2020-10-15 16:47:40,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:40,841 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:40,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100433302] [2020-10-15 16:47:40,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129402632] [2020-10-15 16:47:40,842 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 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 [2020-10-15 16:47:40,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 16:47:40,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:40,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:40,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:40,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:40,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 16:47:40,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792927513] [2020-10-15 16:47:40,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:47:40,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:40,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:47:40,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:47:40,938 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 25 states. [2020-10-15 16:47:42,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:42,531 INFO L93 Difference]: Finished difference Result 135 states and 323 transitions. [2020-10-15 16:47:42,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 16:47:42,532 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 16:47:42,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:42,532 INFO L225 Difference]: With dead ends: 135 [2020-10-15 16:47:42,532 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 16:47:42,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1302, Invalid=2988, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 16:47:42,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 16:47:42,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 95. [2020-10-15 16:47:42,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-15 16:47:42,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 243 transitions. [2020-10-15 16:47:42,535 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 243 transitions. Word has length 29 [2020-10-15 16:47:42,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:42,535 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 243 transitions. [2020-10-15 16:47:42,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:47:42,535 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 243 transitions. [2020-10-15 16:47:42,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:42,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:42,536 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:42,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-10-15 16:47:42,736 INFO L429 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:42,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:42,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1324318364, now seen corresponding path program 258 times [2020-10-15 16:47:42,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:42,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927929360] [2020-10-15 16:47:42,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:43,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927929360] [2020-10-15 16:47:43,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951808156] [2020-10-15 16:47:43,119 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 [2020-10-15 16:47:43,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 16:47:43,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:43,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:43,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:43,222 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:47:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:43,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:43,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 16:47:43,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349699720] [2020-10-15 16:47:43,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:47:43,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:43,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:47:43,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:47:43,247 INFO L87 Difference]: Start difference. First operand 95 states and 243 transitions. Second operand 26 states. [2020-10-15 16:47:45,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:45,196 INFO L93 Difference]: Finished difference Result 132 states and 317 transitions. [2020-10-15 16:47:45,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 16:47:45,197 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 16:47:45,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:45,197 INFO L225 Difference]: With dead ends: 132 [2020-10-15 16:47:45,197 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 16:47:45,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1312, Invalid=3110, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 16:47:45,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 16:47:45,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 94. [2020-10-15 16:47:45,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 16:47:45,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-10-15 16:47:45,200 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 29 [2020-10-15 16:47:45,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:45,200 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-10-15 16:47:45,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:47:45,200 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-10-15 16:47:45,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:45,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:45,201 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:45,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:47:45,402 INFO L429 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:45,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:45,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1323828254, now seen corresponding path program 259 times [2020-10-15 16:47:45,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:45,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042082053] [2020-10-15 16:47:45,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:45,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:45,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042082053] [2020-10-15 16:47:45,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812745905] [2020-10-15 16:47:45,802 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 [2020-10-15 16:47:45,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:45,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:45,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:45,890 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:45,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:45,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 16:47:45,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969651141] [2020-10-15 16:47:45,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:47:45,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:45,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:47:45,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:47:45,892 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 25 states. [2020-10-15 16:47:47,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:47,553 INFO L93 Difference]: Finished difference Result 152 states and 367 transitions. [2020-10-15 16:47:47,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 16:47:47,554 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 16:47:47,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:47,555 INFO L225 Difference]: With dead ends: 152 [2020-10-15 16:47:47,555 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 16:47:47,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1448, Invalid=3108, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 16:47:47,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 16:47:47,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2020-10-15 16:47:47,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 16:47:47,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 261 transitions. [2020-10-15 16:47:47,558 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 261 transitions. Word has length 29 [2020-10-15 16:47:47,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:47,558 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 261 transitions. [2020-10-15 16:47:47,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:47:47,559 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 261 transitions. [2020-10-15 16:47:47,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:47,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:47,559 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:47,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2020-10-15 16:47:47,762 INFO L429 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:47,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:47,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1323811514, now seen corresponding path program 260 times [2020-10-15 16:47:47,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:47,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133489940] [2020-10-15 16:47:47,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:48,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133489940] [2020-10-15 16:47:48,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357615250] [2020-10-15 16:47:48,161 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 [2020-10-15 16:47:48,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:47:48,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:48,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:47:48,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:48,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:48,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 16:47:48,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469202679] [2020-10-15 16:47:48,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:47:48,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:48,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:47:48,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:47:48,284 INFO L87 Difference]: Start difference. First operand 100 states and 261 transitions. Second operand 26 states. [2020-10-15 16:47:50,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:50,274 INFO L93 Difference]: Finished difference Result 133 states and 323 transitions. [2020-10-15 16:47:50,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 16:47:50,275 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 16:47:50,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:50,276 INFO L225 Difference]: With dead ends: 133 [2020-10-15 16:47:50,276 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 16:47:50,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1321, Invalid=3371, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 16:47:50,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 16:47:50,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 97. [2020-10-15 16:47:50,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 16:47:50,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 249 transitions. [2020-10-15 16:47:50,278 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 249 transitions. Word has length 29 [2020-10-15 16:47:50,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:50,279 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 249 transitions. [2020-10-15 16:47:50,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:47:50,279 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 249 transitions. [2020-10-15 16:47:50,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:47:50,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:50,279 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:50,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:47:50,480 INFO L429 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:50,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:50,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1170458439, now seen corresponding path program 261 times [2020-10-15 16:47:50,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:50,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103528631] [2020-10-15 16:47:50,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:50,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:51,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103528631] [2020-10-15 16:47:51,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281935579] [2020-10-15 16:47:51,041 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 [2020-10-15 16:47:51,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 16:47:51,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:51,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:47:51,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:51,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:51,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 16:47:51,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187119102] [2020-10-15 16:47:51,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:47:51,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:51,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:47:51,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:47:51,114 INFO L87 Difference]: Start difference. First operand 97 states and 249 transitions. Second operand 26 states. [2020-10-15 16:47:51,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:51,996 INFO L93 Difference]: Finished difference Result 154 states and 363 transitions. [2020-10-15 16:47:51,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:47:51,997 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 16:47:51,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:51,998 INFO L225 Difference]: With dead ends: 154 [2020-10-15 16:47:51,998 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 16:47:51,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=717, Invalid=1635, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:47:51,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 16:47:52,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 99. [2020-10-15 16:47:52,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:47:52,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 16:47:52,001 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 16:47:52,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:52,001 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 16:47:52,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:47:52,001 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 16:47:52,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:47:52,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:52,002 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:52,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:47:52,202 INFO L429 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:52,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:52,203 INFO L82 PathProgramCache]: Analyzing trace with hash 2085740573, now seen corresponding path program 262 times [2020-10-15 16:47:52,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:52,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685838817] [2020-10-15 16:47:52,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:52,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:52,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685838817] [2020-10-15 16:47:52,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686515393] [2020-10-15 16:47:52,765 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 [2020-10-15 16:47:52,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:47:52,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:52,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:47:52,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:52,852 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:47:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:52,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:52,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 16:47:52,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722955189] [2020-10-15 16:47:52,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:47:52,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:52,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:47:52,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:47:52,867 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 16:47:53,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:53,923 INFO L93 Difference]: Finished difference Result 151 states and 357 transitions. [2020-10-15 16:47:53,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:47:53,924 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 16:47:53,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:53,925 INFO L225 Difference]: With dead ends: 151 [2020-10-15 16:47:53,925 INFO L226 Difference]: Without dead ends: 145 [2020-10-15 16:47:53,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=770, Invalid=1882, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 16:47:53,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-15 16:47:53,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 98. [2020-10-15 16:47:53,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:47:53,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 16:47:53,928 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 16:47:53,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:53,928 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 16:47:53,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:47:53,928 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 16:47:53,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:47:53,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:53,929 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:54,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:47:54,129 INFO L429 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:54,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:54,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1794443493, now seen corresponding path program 263 times [2020-10-15 16:47:54,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:54,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489525517] [2020-10-15 16:47:54,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:54,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:54,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489525517] [2020-10-15 16:47:54,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437703893] [2020-10-15 16:47:54,673 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 [2020-10-15 16:47:54,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 16:47:54,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:54,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:47:54,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:54,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:54,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 16:47:54,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159231568] [2020-10-15 16:47:54,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:47:54,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:54,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:47:54,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:47:54,749 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 16:47:55,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:55,778 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-15 16:47:55,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:47:55,779 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 16:47:55,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:55,780 INFO L225 Difference]: With dead ends: 148 [2020-10-15 16:47:55,780 INFO L226 Difference]: Without dead ends: 142 [2020-10-15 16:47:55,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=720, Invalid=1830, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 16:47:55,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-15 16:47:55,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 99. [2020-10-15 16:47:55,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:47:55,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 16:47:55,782 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 16:47:55,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:55,783 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 16:47:55,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:47:55,783 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 16:47:55,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:47:55,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:55,783 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:55,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:47:55,984 INFO L429 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:55,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:55,984 INFO L82 PathProgramCache]: Analyzing trace with hash 778774399, now seen corresponding path program 264 times [2020-10-15 16:47:55,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:55,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945646581] [2020-10-15 16:47:55,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:56,528 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:56,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945646581] [2020-10-15 16:47:56,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873289541] [2020-10-15 16:47:56,529 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 [2020-10-15 16:47:56,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 16:47:56,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:56,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:47:56,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:56,625 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:47:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:56,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:56,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 16:47:56,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904142596] [2020-10-15 16:47:56,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:47:56,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:56,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:47:56,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:47:56,642 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 16:47:57,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:57,847 INFO L93 Difference]: Finished difference Result 147 states and 349 transitions. [2020-10-15 16:47:57,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:47:57,848 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 16:47:57,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:57,848 INFO L225 Difference]: With dead ends: 147 [2020-10-15 16:47:57,848 INFO L226 Difference]: Without dead ends: 141 [2020-10-15 16:47:57,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=780, Invalid=2082, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:47:57,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-15 16:47:57,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 98. [2020-10-15 16:47:57,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:47:57,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 16:47:57,852 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 16:47:57,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:57,852 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 16:47:57,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:47:57,852 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 16:47:57,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:47:57,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:57,853 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:58,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:47:58,061 INFO L429 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:58,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:58,062 INFO L82 PathProgramCache]: Analyzing trace with hash -405150211, now seen corresponding path program 265 times [2020-10-15 16:47:58,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:58,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491313782] [2020-10-15 16:47:58,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:58,577 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:58,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491313782] [2020-10-15 16:47:58,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845419898] [2020-10-15 16:47:58,578 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 [2020-10-15 16:47:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:58,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:47:58,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:58,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:58,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 16:47:58,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315438972] [2020-10-15 16:47:58,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:47:58,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:58,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:47:58,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:47:58,657 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 16:47:59,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:59,792 INFO L93 Difference]: Finished difference Result 144 states and 343 transitions. [2020-10-15 16:47:59,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:47:59,793 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 16:47:59,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:59,794 INFO L225 Difference]: With dead ends: 144 [2020-10-15 16:47:59,794 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 16:47:59,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=739, Invalid=2017, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 16:47:59,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 16:47:59,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 99. [2020-10-15 16:47:59,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:47:59,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 16:47:59,797 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 16:47:59,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:59,797 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 16:47:59,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:47:59,797 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 16:47:59,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:47:59,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:59,798 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:00,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2020-10-15 16:48:00,001 INFO L429 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:00,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:00,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1953308831, now seen corresponding path program 266 times [2020-10-15 16:48:00,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:00,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812911981] [2020-10-15 16:48:00,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:00,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:00,527 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:00,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812911981] [2020-10-15 16:48:00,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669897158] [2020-10-15 16:48:00,528 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 [2020-10-15 16:48:00,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:48:00,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:00,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:48:00,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:00,615 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:48:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:00,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:00,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 16:48:00,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578771558] [2020-10-15 16:48:00,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:48:00,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:00,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:48:00,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:48:00,634 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 16:48:01,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:01,983 INFO L93 Difference]: Finished difference Result 143 states and 341 transitions. [2020-10-15 16:48:01,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:48:01,985 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 16:48:01,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:01,985 INFO L225 Difference]: With dead ends: 143 [2020-10-15 16:48:01,985 INFO L226 Difference]: Without dead ends: 137 [2020-10-15 16:48:01,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=806, Invalid=2274, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 16:48:01,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-15 16:48:01,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2020-10-15 16:48:01,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:48:01,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 16:48:01,988 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 16:48:01,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:01,988 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 16:48:01,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:48:01,988 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 16:48:01,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:48:01,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:01,988 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:02,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2020-10-15 16:48:02,189 INFO L429 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:02,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:02,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1039869279, now seen corresponding path program 267 times [2020-10-15 16:48:02,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:02,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117028926] [2020-10-15 16:48:02,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:02,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:02,694 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:02,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117028926] [2020-10-15 16:48:02,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119222760] [2020-10-15 16:48:02,695 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 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 [2020-10-15 16:48:02,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 16:48:02,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:02,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:48:02,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:02,773 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:02,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:02,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 16:48:02,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408454332] [2020-10-15 16:48:02,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:48:02,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:02,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:48:02,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:48:02,774 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 16:48:03,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:03,993 INFO L93 Difference]: Finished difference Result 140 states and 335 transitions. [2020-10-15 16:48:03,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:48:03,995 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 16:48:03,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:03,995 INFO L225 Difference]: With dead ends: 140 [2020-10-15 16:48:03,996 INFO L226 Difference]: Without dead ends: 134 [2020-10-15 16:48:03,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=774, Invalid=2196, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 16:48:03,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-15 16:48:03,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 99. [2020-10-15 16:48:03,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:48:03,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 16:48:03,998 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 16:48:03,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:03,998 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 16:48:03,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:48:03,998 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 16:48:03,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:48:03,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:03,999 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:04,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2020-10-15 16:48:04,199 INFO L429 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:04,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:04,200 INFO L82 PathProgramCache]: Analyzing trace with hash 229320643, now seen corresponding path program 268 times [2020-10-15 16:48:04,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:04,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258946983] [2020-10-15 16:48:04,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:04,714 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:04,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258946983] [2020-10-15 16:48:04,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988883266] [2020-10-15 16:48:04,715 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 [2020-10-15 16:48:04,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:48:04,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:04,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:48:04,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:04,801 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:48:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:04,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:04,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 16:48:04,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477218635] [2020-10-15 16:48:04,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:48:04,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:04,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:48:04,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:48:04,821 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 16:48:06,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:06,350 INFO L93 Difference]: Finished difference Result 139 states and 333 transitions. [2020-10-15 16:48:06,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:48:06,351 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 16:48:06,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:06,351 INFO L225 Difference]: With dead ends: 139 [2020-10-15 16:48:06,352 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 16:48:06,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=848, Invalid=2458, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 16:48:06,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 16:48:06,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 98. [2020-10-15 16:48:06,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:48:06,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 16:48:06,354 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 16:48:06,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:06,355 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 16:48:06,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:48:06,355 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 16:48:06,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:48:06,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:06,355 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:06,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-10-15 16:48:06,556 INFO L429 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:06,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:06,556 INFO L82 PathProgramCache]: Analyzing trace with hash 281597249, now seen corresponding path program 269 times [2020-10-15 16:48:06,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:06,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139024783] [2020-10-15 16:48:06,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:07,049 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:07,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139024783] [2020-10-15 16:48:07,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201458938] [2020-10-15 16:48:07,049 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 [2020-10-15 16:48:07,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 16:48:07,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:07,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:48:07,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:07,130 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:07,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:07,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 16:48:07,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587898400] [2020-10-15 16:48:07,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:48:07,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:07,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:48:07,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:48:07,131 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 16:48:08,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:08,480 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-15 16:48:08,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:48:08,481 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 16:48:08,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:08,482 INFO L225 Difference]: With dead ends: 136 [2020-10-15 16:48:08,482 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 16:48:08,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=825, Invalid=2367, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 16:48:08,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 16:48:08,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 99. [2020-10-15 16:48:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:48:08,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 16:48:08,485 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 16:48:08,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:08,485 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 16:48:08,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:48:08,485 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 16:48:08,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:48:08,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:08,485 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:08,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:48:08,686 INFO L429 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:08,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:08,687 INFO L82 PathProgramCache]: Analyzing trace with hash -2137120603, now seen corresponding path program 270 times [2020-10-15 16:48:08,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:08,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892806772] [2020-10-15 16:48:08,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:09,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892806772] [2020-10-15 16:48:09,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288170816] [2020-10-15 16:48:09,173 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 [2020-10-15 16:48:09,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 16:48:09,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:09,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:48:09,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:09,267 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:48:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:09,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:09,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 16:48:09,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473974981] [2020-10-15 16:48:09,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:48:09,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:09,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:48:09,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:48:09,289 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 16:48:10,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:10,943 INFO L93 Difference]: Finished difference Result 135 states and 325 transitions. [2020-10-15 16:48:10,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:48:10,945 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 16:48:10,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:10,946 INFO L225 Difference]: With dead ends: 135 [2020-10-15 16:48:10,946 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 16:48:10,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=906, Invalid=2634, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:48:10,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 16:48:10,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 98. [2020-10-15 16:48:10,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:48:10,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 16:48:10,948 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 16:48:10,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:10,949 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 16:48:10,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:48:10,949 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 16:48:10,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:48:10,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:10,949 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:11,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2020-10-15 16:48:11,150 INFO L429 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:11,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:11,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1448798813, now seen corresponding path program 271 times [2020-10-15 16:48:11,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:11,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229093267] [2020-10-15 16:48:11,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:11,621 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:11,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229093267] [2020-10-15 16:48:11,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654134406] [2020-10-15 16:48:11,622 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 [2020-10-15 16:48:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:11,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:48:11,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:11,699 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:11,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:11,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 16:48:11,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076805215] [2020-10-15 16:48:11,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:48:11,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:11,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:48:11,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:48:11,700 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 16:48:13,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:13,170 INFO L93 Difference]: Finished difference Result 132 states and 319 transitions. [2020-10-15 16:48:13,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:48:13,172 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 16:48:13,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:13,172 INFO L225 Difference]: With dead ends: 132 [2020-10-15 16:48:13,172 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 16:48:13,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=892, Invalid=2530, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 16:48:13,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 16:48:13,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2020-10-15 16:48:13,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:48:13,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 16:48:13,175 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 16:48:13,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:13,175 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 16:48:13,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:48:13,176 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 16:48:13,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:48:13,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:13,176 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:13,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:48:13,377 INFO L429 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:13,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:13,377 INFO L82 PathProgramCache]: Analyzing trace with hash -463607289, now seen corresponding path program 272 times [2020-10-15 16:48:13,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:13,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617863905] [2020-10-15 16:48:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:13,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617863905] [2020-10-15 16:48:13,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958068491] [2020-10-15 16:48:13,853 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 [2020-10-15 16:48:13,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:48:13,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:13,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:48:13,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:13,941 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:48:13,965 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:13,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:13,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 16:48:13,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432404199] [2020-10-15 16:48:13,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:48:13,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:13,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:48:13,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:48:13,966 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 16:48:15,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:15,749 INFO L93 Difference]: Finished difference Result 131 states and 317 transitions. [2020-10-15 16:48:15,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:48:15,750 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 16:48:15,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:15,750 INFO L225 Difference]: With dead ends: 131 [2020-10-15 16:48:15,751 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 16:48:15,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=980, Invalid=2802, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 16:48:15,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 16:48:15,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 98. [2020-10-15 16:48:15,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:48:15,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 16:48:15,753 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 16:48:15,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:15,754 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 16:48:15,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:48:15,754 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 16:48:15,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:48:15,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:15,754 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:15,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:48:15,955 INFO L429 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:15,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:15,956 INFO L82 PathProgramCache]: Analyzing trace with hash -2080766331, now seen corresponding path program 273 times [2020-10-15 16:48:15,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:15,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312231512] [2020-10-15 16:48:15,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:16,426 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:16,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312231512] [2020-10-15 16:48:16,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688334247] [2020-10-15 16:48:16,427 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 [2020-10-15 16:48:16,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 16:48:16,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:16,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:48:16,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:16,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:16,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 16:48:16,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556357138] [2020-10-15 16:48:16,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:48:16,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:16,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:48:16,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:48:16,513 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 16:48:18,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:18,069 INFO L93 Difference]: Finished difference Result 128 states and 311 transitions. [2020-10-15 16:48:18,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:48:18,070 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 16:48:18,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:18,071 INFO L225 Difference]: With dead ends: 128 [2020-10-15 16:48:18,071 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 16:48:18,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=975, Invalid=2685, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 16:48:18,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 16:48:18,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 99. [2020-10-15 16:48:18,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:48:18,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 16:48:18,074 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 16:48:18,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:18,074 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 16:48:18,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:48:18,074 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 16:48:18,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:48:18,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:18,074 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:18,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:48:18,277 INFO L429 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:18,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:18,278 INFO L82 PathProgramCache]: Analyzing trace with hash -823876631, now seen corresponding path program 274 times [2020-10-15 16:48:18,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:18,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257837909] [2020-10-15 16:48:18,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:18,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257837909] [2020-10-15 16:48:18,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704595532] [2020-10-15 16:48:18,753 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 [2020-10-15 16:48:18,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:48:18,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:18,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:48:18,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:18,846 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:48:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:18,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:18,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 16:48:18,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836012281] [2020-10-15 16:48:18,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:48:18,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:18,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:48:18,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:48:18,870 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 16:48:20,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:20,798 INFO L93 Difference]: Finished difference Result 127 states and 309 transitions. [2020-10-15 16:48:20,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 16:48:20,800 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 16:48:20,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:20,800 INFO L225 Difference]: With dead ends: 127 [2020-10-15 16:48:20,801 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 16:48:20,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1070, Invalid=2962, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 16:48:20,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 16:48:20,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2020-10-15 16:48:20,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:48:20,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 16:48:20,803 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 16:48:20,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:20,803 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 16:48:20,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:48:20,803 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 16:48:20,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:48:20,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:20,803 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:21,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:48:21,004 INFO L429 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:21,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:21,005 INFO L82 PathProgramCache]: Analyzing trace with hash 792315879, now seen corresponding path program 275 times [2020-10-15 16:48:21,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:21,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334640324] [2020-10-15 16:48:21,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:21,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334640324] [2020-10-15 16:48:21,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450793714] [2020-10-15 16:48:21,469 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 [2020-10-15 16:48:21,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 16:48:21,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:21,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:48:21,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:21,557 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:21,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:21,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 16:48:21,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668921896] [2020-10-15 16:48:21,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:48:21,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:21,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:48:21,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:48:21,559 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 16:48:23,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:23,239 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-10-15 16:48:23,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 16:48:23,241 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 16:48:23,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:23,241 INFO L225 Difference]: With dead ends: 124 [2020-10-15 16:48:23,241 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 16:48:23,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1074, Invalid=2832, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 16:48:23,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 16:48:23,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 99. [2020-10-15 16:48:23,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:48:23,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 16:48:23,244 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 16:48:23,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:23,244 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 16:48:23,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:48:23,244 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 16:48:23,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:48:23,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:23,245 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:23,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2020-10-15 16:48:23,445 INFO L429 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:23,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:23,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1312058955, now seen corresponding path program 276 times [2020-10-15 16:48:23,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:23,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069208951] [2020-10-15 16:48:23,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:23,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:23,904 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:23,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069208951] [2020-10-15 16:48:23,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760057043] [2020-10-15 16:48:23,905 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 [2020-10-15 16:48:23,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 16:48:23,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:23,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:48:23,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:24,001 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:48:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:24,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:24,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 16:48:24,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317563732] [2020-10-15 16:48:24,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:48:24,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:24,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:48:24,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:48:24,024 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 16:48:26,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:26,158 INFO L93 Difference]: Finished difference Result 123 states and 301 transitions. [2020-10-15 16:48:26,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 16:48:26,160 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 16:48:26,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:26,160 INFO L225 Difference]: With dead ends: 123 [2020-10-15 16:48:26,160 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:48:26,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1176, Invalid=3114, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 16:48:26,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:48:26,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-15 16:48:26,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:48:26,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 16:48:26,163 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 16:48:26,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:26,163 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 16:48:26,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:48:26,163 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 16:48:26,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:48:26,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:26,163 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:26,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2020-10-15 16:48:26,364 INFO L429 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:26,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:26,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1327597111, now seen corresponding path program 277 times [2020-10-15 16:48:26,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:26,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933315500] [2020-10-15 16:48:26,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:26,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933315500] [2020-10-15 16:48:26,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043303011] [2020-10-15 16:48:26,814 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 [2020-10-15 16:48:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:26,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:48:26,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:26,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:26,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 16:48:26,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011463055] [2020-10-15 16:48:26,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:48:26,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:26,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:48:26,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:48:26,898 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 16:48:28,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:28,714 INFO L93 Difference]: Finished difference Result 120 states and 295 transitions. [2020-10-15 16:48:28,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 16:48:28,716 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 16:48:28,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:28,716 INFO L225 Difference]: With dead ends: 120 [2020-10-15 16:48:28,717 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 16:48:28,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1189, Invalid=2971, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 16:48:28,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 16:48:28,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 99. [2020-10-15 16:48:28,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:48:28,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 16:48:28,719 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 16:48:28,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:28,720 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 16:48:28,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:48:28,720 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 16:48:28,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:48:28,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:28,720 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:28,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2020-10-15 16:48:28,921 INFO L429 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:28,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:28,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1247242541, now seen corresponding path program 278 times [2020-10-15 16:48:28,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:28,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695243603] [2020-10-15 16:48:28,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:29,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695243603] [2020-10-15 16:48:29,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933880545] [2020-10-15 16:48:29,397 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 [2020-10-15 16:48:29,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:48:29,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:29,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:48:29,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:29,486 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:48:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:29,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:29,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 16:48:29,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468610039] [2020-10-15 16:48:29,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:48:29,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:29,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:48:29,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:48:29,514 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 16:48:31,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:31,735 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-15 16:48:31,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 16:48:31,736 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 16:48:31,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:31,737 INFO L225 Difference]: With dead ends: 119 [2020-10-15 16:48:31,737 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 16:48:31,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1298, Invalid=3258, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 16:48:31,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 16:48:31,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 98. [2020-10-15 16:48:31,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:48:31,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 16:48:31,740 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 16:48:31,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:31,740 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 16:48:31,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:48:31,740 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 16:48:31,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:48:31,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:31,740 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:31,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-10-15 16:48:31,941 INFO L429 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:31,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:31,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1718238251, now seen corresponding path program 279 times [2020-10-15 16:48:31,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:31,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063598602] [2020-10-15 16:48:31,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:31,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:32,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063598602] [2020-10-15 16:48:32,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777730024] [2020-10-15 16:48:32,397 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 [2020-10-15 16:48:32,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 16:48:32,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:32,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:48:32,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:32,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:32,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 16:48:32,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457296764] [2020-10-15 16:48:32,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:48:32,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:32,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:48:32,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:48:32,489 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 16:48:34,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:34,379 INFO L93 Difference]: Finished difference Result 116 states and 287 transitions. [2020-10-15 16:48:34,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 16:48:34,381 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 16:48:34,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:34,381 INFO L225 Difference]: With dead ends: 116 [2020-10-15 16:48:34,382 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 16:48:34,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1320, Invalid=3102, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 16:48:34,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 16:48:34,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2020-10-15 16:48:34,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:48:34,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 16:48:34,384 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 16:48:34,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:34,385 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 16:48:34,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:48:34,385 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 16:48:34,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:48:34,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:34,385 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:34,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:48:34,586 INFO L429 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:34,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:34,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1734325391, now seen corresponding path program 280 times [2020-10-15 16:48:34,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:34,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311278785] [2020-10-15 16:48:34,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:35,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311278785] [2020-10-15 16:48:35,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552297163] [2020-10-15 16:48:35,057 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 [2020-10-15 16:48:35,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:48:35,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:35,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:48:35,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:35,150 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:48:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:35,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:35,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 16:48:35,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177292224] [2020-10-15 16:48:35,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:48:35,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:35,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:48:35,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:48:35,179 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 16:48:37,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:37,589 INFO L93 Difference]: Finished difference Result 115 states and 285 transitions. [2020-10-15 16:48:37,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 16:48:37,591 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 16:48:37,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:37,591 INFO L225 Difference]: With dead ends: 115 [2020-10-15 16:48:37,591 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 16:48:37,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1436, Invalid=3394, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 16:48:37,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 16:48:37,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2020-10-15 16:48:37,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:48:37,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 16:48:37,599 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 16:48:37,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:37,600 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 16:48:37,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:48:37,600 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 16:48:37,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:48:37,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:37,600 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:37,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2020-10-15 16:48:37,801 INFO L429 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:37,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:37,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1734815501, now seen corresponding path program 281 times [2020-10-15 16:48:37,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:37,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493797458] [2020-10-15 16:48:37,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:38,289 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:38,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493797458] [2020-10-15 16:48:38,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544289591] [2020-10-15 16:48:38,289 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 [2020-10-15 16:48:38,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 16:48:38,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:38,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:48:38,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:38,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:38,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 16:48:38,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81470695] [2020-10-15 16:48:38,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:48:38,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:38,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:48:38,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:48:38,387 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 16:48:40,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:40,439 INFO L93 Difference]: Finished difference Result 131 states and 325 transitions. [2020-10-15 16:48:40,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 16:48:40,441 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 16:48:40,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:40,441 INFO L225 Difference]: With dead ends: 131 [2020-10-15 16:48:40,441 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 16:48:40,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1467, Invalid=3225, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 16:48:40,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 16:48:40,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 102. [2020-10-15 16:48:40,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-15 16:48:40,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 265 transitions. [2020-10-15 16:48:40,444 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 265 transitions. Word has length 30 [2020-10-15 16:48:40,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:40,444 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 265 transitions. [2020-10-15 16:48:40,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:48:40,444 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 265 transitions. [2020-10-15 16:48:40,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:48:40,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:40,444 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:40,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:48:40,645 INFO L429 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:40,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:40,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1734832241, now seen corresponding path program 282 times [2020-10-15 16:48:40,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:40,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301312348] [2020-10-15 16:48:40,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:40,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:41,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301312348] [2020-10-15 16:48:41,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703575358] [2020-10-15 16:48:41,109 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 [2020-10-15 16:48:41,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 16:48:41,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:41,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:48:41,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:41,253 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:41,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:41,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 16:48:41,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697683166] [2020-10-15 16:48:41,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:48:41,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:41,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:48:41,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:48:41,255 INFO L87 Difference]: Start difference. First operand 102 states and 265 transitions. Second operand 27 states. [2020-10-15 16:48:43,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:43,518 INFO L93 Difference]: Finished difference Result 110 states and 277 transitions. [2020-10-15 16:48:43,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 16:48:43,519 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 16:48:43,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:43,520 INFO L225 Difference]: With dead ends: 110 [2020-10-15 16:48:43,520 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 16:48:43,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1337, Invalid=3493, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 16:48:43,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 16:48:43,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 73. [2020-10-15 16:48:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 16:48:43,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 178 transitions. [2020-10-15 16:48:43,522 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 178 transitions. Word has length 30 [2020-10-15 16:48:43,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:43,523 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 178 transitions. [2020-10-15 16:48:43,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:48:43,523 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 178 transitions. [2020-10-15 16:48:43,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:48:43,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:43,523 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:43,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:48:43,724 INFO L429 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:43,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:43,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1911532333, now seen corresponding path program 283 times [2020-10-15 16:48:43,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:43,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766415884] [2020-10-15 16:48:43,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:43,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:44,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766415884] [2020-10-15 16:48:44,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852370996] [2020-10-15 16:48:44,204 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 [2020-10-15 16:48:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:44,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:48:44,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:44,296 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:48:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:44,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:44,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 16:48:44,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129969528] [2020-10-15 16:48:44,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:48:44,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:44,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:48:44,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:48:44,337 INFO L87 Difference]: Start difference. First operand 73 states and 178 transitions. Second operand 27 states. [2020-10-15 16:48:46,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:46,691 INFO L93 Difference]: Finished difference Result 132 states and 323 transitions. [2020-10-15 16:48:46,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 16:48:46,693 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 16:48:46,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:46,693 INFO L225 Difference]: With dead ends: 132 [2020-10-15 16:48:46,694 INFO L226 Difference]: Without dead ends: 127 [2020-10-15 16:48:46,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1649, Invalid=3463, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 16:48:46,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-15 16:48:46,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 100. [2020-10-15 16:48:46,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 16:48:46,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 257 transitions. [2020-10-15 16:48:46,696 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 257 transitions. Word has length 30 [2020-10-15 16:48:46,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:46,696 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 257 transitions. [2020-10-15 16:48:46,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:48:46,696 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 257 transitions. [2020-10-15 16:48:46,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:48:46,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:46,697 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:46,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:48:46,897 INFO L429 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:46,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:46,898 INFO L82 PathProgramCache]: Analyzing trace with hash -2054759070, now seen corresponding path program 284 times [2020-10-15 16:48:46,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:46,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034617999] [2020-10-15 16:48:46,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:47,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034617999] [2020-10-15 16:48:47,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233672454] [2020-10-15 16:48:47,400 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 [2020-10-15 16:48:47,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:48:47,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:47,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:48:47,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:47,491 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:48:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:47,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:47,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 16:48:47,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236932552] [2020-10-15 16:48:47,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:48:47,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:47,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:48:47,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:48:47,534 INFO L87 Difference]: Start difference. First operand 100 states and 257 transitions. Second operand 28 states. [2020-10-15 16:48:50,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:50,029 INFO L93 Difference]: Finished difference Result 108 states and 277 transitions. [2020-10-15 16:48:50,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 16:48:50,031 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 16:48:50,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:50,031 INFO L225 Difference]: With dead ends: 108 [2020-10-15 16:48:50,031 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 16:48:50,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1669, Invalid=3587, Unknown=0, NotChecked=0, Total=5256 [2020-10-15 16:48:50,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 16:48:50,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 74. [2020-10-15 16:48:50,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:48:50,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 182 transitions. [2020-10-15 16:48:50,034 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 182 transitions. Word has length 31 [2020-10-15 16:48:50,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:50,034 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 182 transitions. [2020-10-15 16:48:50,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:48:50,034 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 182 transitions. [2020-10-15 16:48:50,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:48:50,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:50,034 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:50,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:48:50,235 INFO L429 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:50,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:50,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1128130483, now seen corresponding path program 285 times [2020-10-15 16:48:50,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:50,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863263903] [2020-10-15 16:48:50,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:50,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:50,899 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:50,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863263903] [2020-10-15 16:48:50,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295729817] [2020-10-15 16:48:50,900 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 [2020-10-15 16:48:50,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 16:48:50,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:50,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:48:50,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:50,975 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:50,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:50,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 16:48:50,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707378210] [2020-10-15 16:48:50,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:48:50,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:50,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:48:50,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:48:50,976 INFO L87 Difference]: Start difference. First operand 74 states and 182 transitions. Second operand 27 states. [2020-10-15 16:48:51,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:51,966 INFO L93 Difference]: Finished difference Result 114 states and 265 transitions. [2020-10-15 16:48:51,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:48:51,967 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 16:48:51,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:51,967 INFO L225 Difference]: With dead ends: 114 [2020-10-15 16:48:51,967 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 16:48:51,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=783, Invalid=1667, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 16:48:51,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 16:48:51,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2020-10-15 16:48:51,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:48:51,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 201 transitions. [2020-10-15 16:48:51,970 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 201 transitions. Word has length 31 [2020-10-15 16:48:51,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:51,970 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 201 transitions. [2020-10-15 16:48:51,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:48:51,970 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 201 transitions. [2020-10-15 16:48:51,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:48:51,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:51,971 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:52,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:48:52,171 INFO L429 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:52,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:52,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1342928561, now seen corresponding path program 286 times [2020-10-15 16:48:52,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:52,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036601271] [2020-10-15 16:48:52,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:52,874 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:52,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036601271] [2020-10-15 16:48:52,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975180905] [2020-10-15 16:48:52,875 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 [2020-10-15 16:48:52,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:48:52,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:52,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:48:52,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:52,972 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:48:52,993 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:52,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:52,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 16:48:52,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594783867] [2020-10-15 16:48:52,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:48:52,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:52,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:48:52,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:48:52,994 INFO L87 Difference]: Start difference. First operand 82 states and 201 transitions. Second operand 28 states. [2020-10-15 16:48:54,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:54,254 INFO L93 Difference]: Finished difference Result 138 states and 313 transitions. [2020-10-15 16:48:54,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:48:54,256 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 16:48:54,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:54,256 INFO L225 Difference]: With dead ends: 138 [2020-10-15 16:48:54,256 INFO L226 Difference]: Without dead ends: 132 [2020-10-15 16:48:54,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=792, Invalid=1860, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 16:48:54,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-15 16:48:54,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 80. [2020-10-15 16:48:54,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:48:54,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 197 transitions. [2020-10-15 16:48:54,259 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 197 transitions. Word has length 31 [2020-10-15 16:48:54,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:54,259 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 197 transitions. [2020-10-15 16:48:54,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:48:54,259 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 197 transitions. [2020-10-15 16:48:54,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:48:54,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:54,259 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:54,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-10-15 16:48:54,460 INFO L429 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:54,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:54,461 INFO L82 PathProgramCache]: Analyzing trace with hash 517654063, now seen corresponding path program 287 times [2020-10-15 16:48:54,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:54,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564727754] [2020-10-15 16:48:54,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:55,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564727754] [2020-10-15 16:48:55,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582206391] [2020-10-15 16:48:55,159 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 [2020-10-15 16:48:55,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 16:48:55,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:55,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:48:55,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:55,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:55,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 16:48:55,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291816937] [2020-10-15 16:48:55,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:48:55,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:55,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:48:55,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:48:55,241 INFO L87 Difference]: Start difference. First operand 80 states and 197 transitions. Second operand 27 states. [2020-10-15 16:48:56,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:56,513 INFO L93 Difference]: Finished difference Result 139 states and 317 transitions. [2020-10-15 16:48:56,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:48:56,515 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 16:48:56,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:56,515 INFO L225 Difference]: With dead ends: 139 [2020-10-15 16:48:56,515 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 16:48:56,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=793, Invalid=1963, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 16:48:56,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 16:48:56,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 83. [2020-10-15 16:48:56,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 16:48:56,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 205 transitions. [2020-10-15 16:48:56,518 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 205 transitions. Word has length 31 [2020-10-15 16:48:56,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:56,518 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 205 transitions. [2020-10-15 16:48:56,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:48:56,518 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 205 transitions. [2020-10-15 16:48:56,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:48:56,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:56,519 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:56,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-10-15 16:48:56,719 INFO L429 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:56,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:56,720 INFO L82 PathProgramCache]: Analyzing trace with hash -521114221, now seen corresponding path program 288 times [2020-10-15 16:48:56,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:56,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523692538] [2020-10-15 16:48:56,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:56,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:57,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523692538] [2020-10-15 16:48:57,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721358893] [2020-10-15 16:48:57,373 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 [2020-10-15 16:48:57,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 16:48:57,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:57,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:48:57,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:57,471 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:48:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:57,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:57,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 16:48:57,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343043009] [2020-10-15 16:48:57,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:48:57,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:57,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:48:57,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:48:57,491 INFO L87 Difference]: Start difference. First operand 83 states and 205 transitions. Second operand 28 states. [2020-10-15 16:48:58,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:58,809 INFO L93 Difference]: Finished difference Result 159 states and 357 transitions. [2020-10-15 16:48:58,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:48:58,811 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 16:48:58,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:58,811 INFO L225 Difference]: With dead ends: 159 [2020-10-15 16:48:58,811 INFO L226 Difference]: Without dead ends: 153 [2020-10-15 16:48:58,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=833, Invalid=2137, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 16:48:58,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-15 16:48:58,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 82. [2020-10-15 16:48:58,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:48:58,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 203 transitions. [2020-10-15 16:48:58,814 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 203 transitions. Word has length 31 [2020-10-15 16:48:58,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:58,814 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 203 transitions. [2020-10-15 16:48:58,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:48:58,814 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 203 transitions. [2020-10-15 16:48:58,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:48:58,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:58,814 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:59,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-10-15 16:48:59,015 INFO L429 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:59,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:59,016 INFO L82 PathProgramCache]: Analyzing trace with hash -106330991, now seen corresponding path program 289 times [2020-10-15 16:48:59,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:59,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729146247] [2020-10-15 16:48:59,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:59,649 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:59,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729146247] [2020-10-15 16:48:59,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777854471] [2020-10-15 16:48:59,650 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 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 [2020-10-15 16:48:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:59,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:48:59,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:59,721 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:59,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:59,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 16:48:59,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863589615] [2020-10-15 16:48:59,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:48:59,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:59,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:48:59,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:48:59,722 INFO L87 Difference]: Start difference. First operand 82 states and 203 transitions. Second operand 27 states. [2020-10-15 16:49:01,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:01,084 INFO L93 Difference]: Finished difference Result 159 states and 359 transitions. [2020-10-15 16:49:01,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:49:01,085 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 16:49:01,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:01,086 INFO L225 Difference]: With dead ends: 159 [2020-10-15 16:49:01,086 INFO L226 Difference]: Without dead ends: 153 [2020-10-15 16:49:01,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=848, Invalid=2232, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 16:49:01,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-15 16:49:01,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 85. [2020-10-15 16:49:01,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 16:49:01,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 211 transitions. [2020-10-15 16:49:01,088 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 211 transitions. Word has length 31 [2020-10-15 16:49:01,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:01,089 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 211 transitions. [2020-10-15 16:49:01,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:49:01,089 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 211 transitions. [2020-10-15 16:49:01,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:49:01,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:01,089 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:01,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:49:01,290 INFO L429 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:01,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:01,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1828080395, now seen corresponding path program 290 times [2020-10-15 16:49:01,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:01,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860956438] [2020-10-15 16:49:01,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:01,926 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:01,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860956438] [2020-10-15 16:49:01,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672289222] [2020-10-15 16:49:01,927 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 [2020-10-15 16:49:01,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:49:01,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:01,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:49:01,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:02,017 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:49:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:02,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:02,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 16:49:02,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390303638] [2020-10-15 16:49:02,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:49:02,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:02,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:49:02,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:49:02,035 INFO L87 Difference]: Start difference. First operand 85 states and 211 transitions. Second operand 28 states. [2020-10-15 16:49:03,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:03,546 INFO L93 Difference]: Finished difference Result 156 states and 353 transitions. [2020-10-15 16:49:03,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:49:03,547 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 16:49:03,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:03,548 INFO L225 Difference]: With dead ends: 156 [2020-10-15 16:49:03,548 INFO L226 Difference]: Without dead ends: 150 [2020-10-15 16:49:03,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=850, Invalid=2342, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 16:49:03,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-15 16:49:03,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 84. [2020-10-15 16:49:03,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 16:49:03,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 209 transitions. [2020-10-15 16:49:03,550 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 209 transitions. Word has length 31 [2020-10-15 16:49:03,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:03,551 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 209 transitions. [2020-10-15 16:49:03,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:49:03,551 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 209 transitions. [2020-10-15 16:49:03,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:49:03,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:03,551 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:03,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:49:03,752 INFO L429 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:03,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:03,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1282962291, now seen corresponding path program 291 times [2020-10-15 16:49:03,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:03,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834569262] [2020-10-15 16:49:03,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:04,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834569262] [2020-10-15 16:49:04,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568954431] [2020-10-15 16:49:04,367 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 [2020-10-15 16:49:04,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 16:49:04,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:04,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:49:04,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:04,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:04,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 16:49:04,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044733227] [2020-10-15 16:49:04,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:49:04,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:04,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:49:04,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:49:04,453 INFO L87 Difference]: Start difference. First operand 84 states and 209 transitions. Second operand 27 states. [2020-10-15 16:49:05,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:05,845 INFO L93 Difference]: Finished difference Result 157 states and 357 transitions. [2020-10-15 16:49:05,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:49:05,848 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 16:49:05,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:05,848 INFO L225 Difference]: With dead ends: 157 [2020-10-15 16:49:05,848 INFO L226 Difference]: Without dead ends: 151 [2020-10-15 16:49:05,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=880, Invalid=2426, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 16:49:05,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-15 16:49:05,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 87. [2020-10-15 16:49:05,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:49:05,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 217 transitions. [2020-10-15 16:49:05,851 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 217 transitions. Word has length 31 [2020-10-15 16:49:05,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:05,851 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 217 transitions. [2020-10-15 16:49:05,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:49:05,851 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 217 transitions. [2020-10-15 16:49:05,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:49:05,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:05,851 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:06,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:49:06,052 INFO L429 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:06,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:06,053 INFO L82 PathProgramCache]: Analyzing trace with hash -265196329, now seen corresponding path program 292 times [2020-10-15 16:49:06,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:06,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28861213] [2020-10-15 16:49:06,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:06,662 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:06,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28861213] [2020-10-15 16:49:06,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653245489] [2020-10-15 16:49:06,663 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 [2020-10-15 16:49:06,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:49:06,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:06,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:49:06,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:06,754 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:49:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:06,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:06,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 16:49:06,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891990295] [2020-10-15 16:49:06,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:49:06,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:06,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:49:06,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:49:06,777 INFO L87 Difference]: Start difference. First operand 87 states and 217 transitions. Second operand 28 states. [2020-10-15 16:49:08,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:08,336 INFO L93 Difference]: Finished difference Result 154 states and 351 transitions. [2020-10-15 16:49:08,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:49:08,338 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 16:49:08,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:08,339 INFO L225 Difference]: With dead ends: 154 [2020-10-15 16:49:08,339 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 16:49:08,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=883, Invalid=2539, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 16:49:08,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 16:49:08,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 86. [2020-10-15 16:49:08,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:49:08,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 215 transitions. [2020-10-15 16:49:08,340 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 215 transitions. Word has length 31 [2020-10-15 16:49:08,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:08,341 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 215 transitions. [2020-10-15 16:49:08,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:49:08,341 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 215 transitions. [2020-10-15 16:49:08,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:49:08,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:08,341 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:08,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2020-10-15 16:49:08,542 INFO L429 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:08,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:08,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1566985515, now seen corresponding path program 293 times [2020-10-15 16:49:08,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:08,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933910614] [2020-10-15 16:49:08,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:09,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933910614] [2020-10-15 16:49:09,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119629019] [2020-10-15 16:49:09,117 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 [2020-10-15 16:49:09,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 16:49:09,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:09,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:49:09,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:09,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:09,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 16:49:09,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517749225] [2020-10-15 16:49:09,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:49:09,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:09,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:49:09,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:49:09,201 INFO L87 Difference]: Start difference. First operand 86 states and 215 transitions. Second operand 27 states. [2020-10-15 16:49:10,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:10,759 INFO L93 Difference]: Finished difference Result 155 states and 355 transitions. [2020-10-15 16:49:10,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:49:10,760 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 16:49:10,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:10,761 INFO L225 Difference]: With dead ends: 155 [2020-10-15 16:49:10,761 INFO L226 Difference]: Without dead ends: 149 [2020-10-15 16:49:10,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=928, Invalid=2612, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:49:10,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-15 16:49:10,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 89. [2020-10-15 16:49:10,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-15 16:49:10,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 223 transitions. [2020-10-15 16:49:10,763 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 223 transitions. Word has length 31 [2020-10-15 16:49:10,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:10,764 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 223 transitions. [2020-10-15 16:49:10,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:49:10,764 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 223 transitions. [2020-10-15 16:49:10,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:49:10,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:10,765 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:10,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:49:10,970 INFO L429 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:10,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:10,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1917433145, now seen corresponding path program 294 times [2020-10-15 16:49:10,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:10,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514154358] [2020-10-15 16:49:10,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:11,579 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:11,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514154358] [2020-10-15 16:49:11,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004020385] [2020-10-15 16:49:11,580 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 [2020-10-15 16:49:11,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 16:49:11,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:11,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:49:11,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:11,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:49:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:11,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:11,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 16:49:11,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270428442] [2020-10-15 16:49:11,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:49:11,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:11,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:49:11,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:49:11,710 INFO L87 Difference]: Start difference. First operand 89 states and 223 transitions. Second operand 28 states. [2020-10-15 16:49:13,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:13,500 INFO L93 Difference]: Finished difference Result 152 states and 349 transitions. [2020-10-15 16:49:13,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:49:13,501 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 16:49:13,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:13,502 INFO L225 Difference]: With dead ends: 152 [2020-10-15 16:49:13,502 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 16:49:13,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=932, Invalid=2728, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 16:49:13,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 16:49:13,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 88. [2020-10-15 16:49:13,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 16:49:13,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 221 transitions. [2020-10-15 16:49:13,505 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 221 transitions. Word has length 31 [2020-10-15 16:49:13,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:13,505 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 221 transitions. [2020-10-15 16:49:13,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:49:13,505 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 221 transitions. [2020-10-15 16:49:13,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:49:13,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:13,505 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:13,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:49:13,707 INFO L429 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:13,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:13,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1969709751, now seen corresponding path program 295 times [2020-10-15 16:49:13,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:13,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17461332] [2020-10-15 16:49:13,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:13,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:14,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17461332] [2020-10-15 16:49:14,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392794364] [2020-10-15 16:49:14,286 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 [2020-10-15 16:49:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:14,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:49:14,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:14,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:14,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 16:49:14,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707430220] [2020-10-15 16:49:14,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:49:14,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:14,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:49:14,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:49:14,364 INFO L87 Difference]: Start difference. First operand 88 states and 221 transitions. Second operand 27 states. [2020-10-15 16:49:16,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:16,055 INFO L93 Difference]: Finished difference Result 153 states and 353 transitions. [2020-10-15 16:49:16,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:49:16,056 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 16:49:16,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:16,057 INFO L225 Difference]: With dead ends: 153 [2020-10-15 16:49:16,057 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 16:49:16,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=992, Invalid=2790, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 16:49:16,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 16:49:16,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 91. [2020-10-15 16:49:16,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 16:49:16,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 229 transitions. [2020-10-15 16:49:16,059 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 229 transitions. Word has length 31 [2020-10-15 16:49:16,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:16,059 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 229 transitions. [2020-10-15 16:49:16,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:49:16,059 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 229 transitions. [2020-10-15 16:49:16,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:49:16,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:16,060 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:16,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:49:16,261 INFO L429 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:16,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:16,261 INFO L82 PathProgramCache]: Analyzing trace with hash -449008101, now seen corresponding path program 296 times [2020-10-15 16:49:16,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:16,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233041829] [2020-10-15 16:49:16,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:16,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233041829] [2020-10-15 16:49:16,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367499921] [2020-10-15 16:49:16,850 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 [2020-10-15 16:49:16,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:49:16,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:16,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:49:16,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:16,945 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:49:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:16,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:16,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 16:49:16,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390002351] [2020-10-15 16:49:16,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:49:16,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:16,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:49:16,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:49:16,978 INFO L87 Difference]: Start difference. First operand 91 states and 229 transitions. Second operand 28 states. [2020-10-15 16:49:18,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:18,951 INFO L93 Difference]: Finished difference Result 150 states and 347 transitions. [2020-10-15 16:49:18,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:49:18,953 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 16:49:18,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:18,953 INFO L225 Difference]: With dead ends: 150 [2020-10-15 16:49:18,953 INFO L226 Difference]: Without dead ends: 144 [2020-10-15 16:49:18,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=997, Invalid=2909, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 16:49:18,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-15 16:49:18,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 90. [2020-10-15 16:49:18,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 16:49:18,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 227 transitions. [2020-10-15 16:49:18,956 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 227 transitions. Word has length 31 [2020-10-15 16:49:18,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:18,956 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 227 transitions. [2020-10-15 16:49:18,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:49:18,956 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 227 transitions. [2020-10-15 16:49:18,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:49:18,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:18,957 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:19,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:49:19,157 INFO L429 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:19,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:19,158 INFO L82 PathProgramCache]: Analyzing trace with hash 239313689, now seen corresponding path program 297 times [2020-10-15 16:49:19,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:19,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458623707] [2020-10-15 16:49:19,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:19,739 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:19,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458623707] [2020-10-15 16:49:19,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785855108] [2020-10-15 16:49:19,740 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 [2020-10-15 16:49:19,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 16:49:19,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:19,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:49:19,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:19,830 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:19,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:19,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 16:49:19,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620426453] [2020-10-15 16:49:19,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:49:19,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:19,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:49:19,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:49:19,831 INFO L87 Difference]: Start difference. First operand 90 states and 227 transitions. Second operand 27 states. [2020-10-15 16:49:21,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:21,618 INFO L93 Difference]: Finished difference Result 151 states and 351 transitions. [2020-10-15 16:49:21,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 16:49:21,619 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 16:49:21,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:21,620 INFO L225 Difference]: With dead ends: 151 [2020-10-15 16:49:21,620 INFO L226 Difference]: Without dead ends: 145 [2020-10-15 16:49:21,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1072, Invalid=2960, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 16:49:21,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-15 16:49:21,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 93. [2020-10-15 16:49:21,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:49:21,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 235 transitions. [2020-10-15 16:49:21,623 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 235 transitions. Word has length 31 [2020-10-15 16:49:21,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:21,623 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 235 transitions. [2020-10-15 16:49:21,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:49:21,623 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 235 transitions. [2020-10-15 16:49:21,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:49:21,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:21,624 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:21,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:49:21,824 INFO L429 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:21,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:21,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1224505213, now seen corresponding path program 298 times [2020-10-15 16:49:21,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:21,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649179339] [2020-10-15 16:49:21,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:22,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649179339] [2020-10-15 16:49:22,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198899117] [2020-10-15 16:49:22,422 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 [2020-10-15 16:49:22,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:49:22,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:22,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:49:22,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:22,518 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:49:22,541 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:22,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:22,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 16:49:22,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268930983] [2020-10-15 16:49:22,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:49:22,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:22,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:49:22,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:49:22,542 INFO L87 Difference]: Start difference. First operand 93 states and 235 transitions. Second operand 28 states. [2020-10-15 16:49:24,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:24,676 INFO L93 Difference]: Finished difference Result 148 states and 345 transitions. [2020-10-15 16:49:24,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 16:49:24,677 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 16:49:24,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:24,677 INFO L225 Difference]: With dead ends: 148 [2020-10-15 16:49:24,677 INFO L226 Difference]: Without dead ends: 142 [2020-10-15 16:49:24,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1078, Invalid=3082, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 16:49:24,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-15 16:49:24,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 92. [2020-10-15 16:49:24,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:49:24,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 233 transitions. [2020-10-15 16:49:24,681 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 233 transitions. Word has length 31 [2020-10-15 16:49:24,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:24,681 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 233 transitions. [2020-10-15 16:49:24,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:49:24,681 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 233 transitions. [2020-10-15 16:49:24,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:49:24,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:24,682 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:24,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2020-10-15 16:49:24,891 INFO L429 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:24,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:24,891 INFO L82 PathProgramCache]: Analyzing trace with hash -392653829, now seen corresponding path program 299 times [2020-10-15 16:49:24,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:24,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817644255] [2020-10-15 16:49:24,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:24,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:25,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817644255] [2020-10-15 16:49:25,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637630044] [2020-10-15 16:49:25,461 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 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 [2020-10-15 16:49:25,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 16:49:25,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:25,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:49:25,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:25,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:25,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 16:49:25,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913051141] [2020-10-15 16:49:25,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:49:25,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:25,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:49:25,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:49:25,552 INFO L87 Difference]: Start difference. First operand 92 states and 233 transitions. Second operand 27 states. [2020-10-15 16:49:27,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:27,460 INFO L93 Difference]: Finished difference Result 149 states and 349 transitions. [2020-10-15 16:49:27,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 16:49:27,462 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 16:49:27,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:27,462 INFO L225 Difference]: With dead ends: 149 [2020-10-15 16:49:27,462 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 16:49:27,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1168, Invalid=3122, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 16:49:27,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 16:49:27,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 95. [2020-10-15 16:49:27,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-15 16:49:27,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 241 transitions. [2020-10-15 16:49:27,465 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 241 transitions. Word has length 31 [2020-10-15 16:49:27,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:27,465 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 241 transitions. [2020-10-15 16:49:27,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:49:27,465 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 241 transitions. [2020-10-15 16:49:27,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:49:27,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:27,466 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:27,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2020-10-15 16:49:27,666 INFO L429 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:27,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:27,667 INFO L82 PathProgramCache]: Analyzing trace with hash 864235871, now seen corresponding path program 300 times [2020-10-15 16:49:27,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:27,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292564006] [2020-10-15 16:49:27,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:27,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:28,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292564006] [2020-10-15 16:49:28,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118611391] [2020-10-15 16:49:28,225 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 [2020-10-15 16:49:28,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 16:49:28,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:28,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:49:28,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:28,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:49:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:28,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:28,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 16:49:28,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093738793] [2020-10-15 16:49:28,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:49:28,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:28,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:49:28,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:49:28,361 INFO L87 Difference]: Start difference. First operand 95 states and 241 transitions. Second operand 28 states. [2020-10-15 16:49:30,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:30,619 INFO L93 Difference]: Finished difference Result 146 states and 343 transitions. [2020-10-15 16:49:30,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 16:49:30,621 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 16:49:30,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:30,621 INFO L225 Difference]: With dead ends: 146 [2020-10-15 16:49:30,621 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 16:49:30,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1175, Invalid=3247, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 16:49:30,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 16:49:30,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 94. [2020-10-15 16:49:30,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 16:49:30,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 239 transitions. [2020-10-15 16:49:30,623 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 239 transitions. Word has length 31 [2020-10-15 16:49:30,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:30,623 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 239 transitions. [2020-10-15 16:49:30,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:49:30,623 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 239 transitions. [2020-10-15 16:49:30,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:49:30,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:30,624 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:30,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2020-10-15 16:49:30,824 INFO L429 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:30,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:30,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1814538915, now seen corresponding path program 301 times [2020-10-15 16:49:30,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:30,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551622675] [2020-10-15 16:49:30,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:30,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:31,379 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:31,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551622675] [2020-10-15 16:49:31,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6198091] [2020-10-15 16:49:31,380 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 [2020-10-15 16:49:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:31,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:49:31,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:31,477 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:31,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:31,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 16:49:31,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494871665] [2020-10-15 16:49:31,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:49:31,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:31,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:49:31,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:49:31,478 INFO L87 Difference]: Start difference. First operand 94 states and 239 transitions. Second operand 27 states. [2020-10-15 16:49:33,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:33,530 INFO L93 Difference]: Finished difference Result 147 states and 347 transitions. [2020-10-15 16:49:33,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 16:49:33,531 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 16:49:33,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:33,532 INFO L225 Difference]: With dead ends: 147 [2020-10-15 16:49:33,532 INFO L226 Difference]: Without dead ends: 141 [2020-10-15 16:49:33,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1280, Invalid=3276, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 16:49:33,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-15 16:49:33,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 97. [2020-10-15 16:49:33,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 16:49:33,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 247 transitions. [2020-10-15 16:49:33,535 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 247 transitions. Word has length 31 [2020-10-15 16:49:33,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:33,535 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 247 transitions. [2020-10-15 16:49:33,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:49:33,535 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 247 transitions. [2020-10-15 16:49:33,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:49:33,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:33,536 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:33,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:49:33,737 INFO L429 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:33,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:33,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1294795839, now seen corresponding path program 302 times [2020-10-15 16:49:33,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:33,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313731401] [2020-10-15 16:49:33,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:33,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:34,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313731401] [2020-10-15 16:49:34,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871691401] [2020-10-15 16:49:34,306 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 [2020-10-15 16:49:34,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:49:34,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:34,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:49:34,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:34,401 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:49:34,426 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:34,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:34,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 16:49:34,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869361573] [2020-10-15 16:49:34,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:49:34,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:34,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:49:34,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:49:34,427 INFO L87 Difference]: Start difference. First operand 97 states and 247 transitions. Second operand 28 states. [2020-10-15 16:49:36,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:36,914 INFO L93 Difference]: Finished difference Result 144 states and 341 transitions. [2020-10-15 16:49:36,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 16:49:36,916 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 16:49:36,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:36,916 INFO L225 Difference]: With dead ends: 144 [2020-10-15 16:49:36,917 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 16:49:36,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1288, Invalid=3404, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 16:49:36,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 16:49:36,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 96. [2020-10-15 16:49:36,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 16:49:36,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 245 transitions. [2020-10-15 16:49:36,919 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 245 transitions. Word has length 31 [2020-10-15 16:49:36,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:36,919 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 245 transitions. [2020-10-15 16:49:36,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:49:36,919 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 245 transitions. [2020-10-15 16:49:36,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:49:36,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:36,920 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:37,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2020-10-15 16:49:37,121 INFO L429 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:37,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:37,121 INFO L82 PathProgramCache]: Analyzing trace with hash 360515391, now seen corresponding path program 303 times [2020-10-15 16:49:37,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:37,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523665649] [2020-10-15 16:49:37,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:37,701 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:37,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523665649] [2020-10-15 16:49:37,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321618004] [2020-10-15 16:49:37,702 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 [2020-10-15 16:49:37,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 16:49:37,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:37,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:49:37,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:37,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:37,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 16:49:37,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948875025] [2020-10-15 16:49:37,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:49:37,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:37,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:49:37,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:49:37,804 INFO L87 Difference]: Start difference. First operand 96 states and 245 transitions. Second operand 27 states. [2020-10-15 16:49:39,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:39,992 INFO L93 Difference]: Finished difference Result 145 states and 345 transitions. [2020-10-15 16:49:39,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 16:49:39,994 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 16:49:39,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:39,994 INFO L225 Difference]: With dead ends: 145 [2020-10-15 16:49:39,994 INFO L226 Difference]: Without dead ends: 139 [2020-10-15 16:49:39,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1408, Invalid=3422, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 16:49:39,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-15 16:49:39,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 99. [2020-10-15 16:49:39,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:49:39,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 16:49:39,996 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 31 [2020-10-15 16:49:39,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:39,996 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 16:49:39,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:49:39,996 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 16:49:39,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:49:39,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:39,997 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:40,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:49:40,197 INFO L429 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:40,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:40,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1359612253, now seen corresponding path program 304 times [2020-10-15 16:49:40,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:40,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996035409] [2020-10-15 16:49:40,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:40,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:40,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996035409] [2020-10-15 16:49:40,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612448517] [2020-10-15 16:49:40,770 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 [2020-10-15 16:49:40,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:49:40,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:40,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:49:40,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:40,867 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:49:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:40,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:40,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 16:49:40,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649441711] [2020-10-15 16:49:40,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:49:40,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:40,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:49:40,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:49:40,901 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 28 states. [2020-10-15 16:49:43,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:43,582 INFO L93 Difference]: Finished difference Result 142 states and 339 transitions. [2020-10-15 16:49:43,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 16:49:43,584 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 16:49:43,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:43,585 INFO L225 Difference]: With dead ends: 142 [2020-10-15 16:49:43,585 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 16:49:43,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1417, Invalid=3553, Unknown=0, NotChecked=0, Total=4970 [2020-10-15 16:49:43,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 16:49:43,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 98. [2020-10-15 16:49:43,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:49:43,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 16:49:43,588 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 31 [2020-10-15 16:49:43,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:43,588 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 16:49:43,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:49:43,588 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 16:49:43,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:49:43,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:43,588 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:43,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2020-10-15 16:49:43,789 INFO L429 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:43,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:43,789 INFO L82 PathProgramCache]: Analyzing trace with hash -888616543, now seen corresponding path program 305 times [2020-10-15 16:49:43,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:43,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505207318] [2020-10-15 16:49:43,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:43,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:44,361 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:44,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505207318] [2020-10-15 16:49:44,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687337023] [2020-10-15 16:49:44,361 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 [2020-10-15 16:49:44,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 16:49:44,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:44,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:49:44,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:44,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:44,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 16:49:44,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250373258] [2020-10-15 16:49:44,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:49:44,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:44,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:49:44,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:49:44,462 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 27 states. [2020-10-15 16:49:46,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:46,765 INFO L93 Difference]: Finished difference Result 143 states and 343 transitions. [2020-10-15 16:49:46,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-15 16:49:46,767 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 16:49:46,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:46,768 INFO L225 Difference]: With dead ends: 143 [2020-10-15 16:49:46,768 INFO L226 Difference]: Without dead ends: 137 [2020-10-15 16:49:46,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1552, Invalid=3560, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 16:49:46,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-15 16:49:46,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 101. [2020-10-15 16:49:46,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 16:49:46,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 259 transitions. [2020-10-15 16:49:46,771 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 259 transitions. Word has length 31 [2020-10-15 16:49:46,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:46,771 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 259 transitions. [2020-10-15 16:49:46,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:49:46,771 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 259 transitions. [2020-10-15 16:49:46,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:49:46,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:46,772 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:46,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:49:46,972 INFO L429 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:46,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:46,973 INFO L82 PathProgramCache]: Analyzing trace with hash -872529403, now seen corresponding path program 306 times [2020-10-15 16:49:46,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:46,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391181787] [2020-10-15 16:49:46,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:47,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391181787] [2020-10-15 16:49:47,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950349793] [2020-10-15 16:49:47,530 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 [2020-10-15 16:49:47,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 16:49:47,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:47,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:49:47,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:47,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:49:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:47,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:47,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 16:49:47,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034087308] [2020-10-15 16:49:47,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:49:47,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:47,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:49:47,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:49:47,672 INFO L87 Difference]: Start difference. First operand 101 states and 259 transitions. Second operand 28 states. [2020-10-15 16:49:50,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:50,457 INFO L93 Difference]: Finished difference Result 140 states and 337 transitions. [2020-10-15 16:49:50,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 16:49:50,458 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 16:49:50,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:50,459 INFO L225 Difference]: With dead ends: 140 [2020-10-15 16:49:50,459 INFO L226 Difference]: Without dead ends: 134 [2020-10-15 16:49:50,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1453 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1562, Invalid=3694, Unknown=0, NotChecked=0, Total=5256 [2020-10-15 16:49:50,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-15 16:49:50,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 100. [2020-10-15 16:49:50,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 16:49:50,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 257 transitions. [2020-10-15 16:49:50,462 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 257 transitions. Word has length 31 [2020-10-15 16:49:50,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:50,462 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 257 transitions. [2020-10-15 16:49:50,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:49:50,462 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 257 transitions. [2020-10-15 16:49:50,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:49:50,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:50,462 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:50,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:49:50,663 INFO L429 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:50,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:50,664 INFO L82 PathProgramCache]: Analyzing trace with hash -872039293, now seen corresponding path program 307 times [2020-10-15 16:49:50,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:50,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967568097] [2020-10-15 16:49:50,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:50,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:51,248 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:51,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967568097] [2020-10-15 16:49:51,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444482865] [2020-10-15 16:49:51,249 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 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 [2020-10-15 16:49:51,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:51,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:49:51,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:51,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:51,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 16:49:51,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803529596] [2020-10-15 16:49:51,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:49:51,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:51,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:49:51,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:49:51,347 INFO L87 Difference]: Start difference. First operand 100 states and 257 transitions. Second operand 27 states. [2020-10-15 16:49:53,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:53,754 INFO L93 Difference]: Finished difference Result 160 states and 387 transitions. [2020-10-15 16:49:53,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 16:49:53,756 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 16:49:53,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:53,756 INFO L225 Difference]: With dead ends: 160 [2020-10-15 16:49:53,756 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 16:49:53,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1712, Invalid=3690, Unknown=0, NotChecked=0, Total=5402 [2020-10-15 16:49:53,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 16:49:53,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 106. [2020-10-15 16:49:53,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-15 16:49:53,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 277 transitions. [2020-10-15 16:49:53,758 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 277 transitions. Word has length 31 [2020-10-15 16:49:53,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:53,758 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 277 transitions. [2020-10-15 16:49:53,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:49:53,758 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 277 transitions. [2020-10-15 16:49:53,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:49:53,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:53,759 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:53,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2020-10-15 16:49:53,959 INFO L429 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:53,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:53,960 INFO L82 PathProgramCache]: Analyzing trace with hash -872022553, now seen corresponding path program 308 times [2020-10-15 16:49:53,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:53,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799591811] [2020-10-15 16:49:53,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:54,546 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:54,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799591811] [2020-10-15 16:49:54,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151285678] [2020-10-15 16:49:54,547 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 [2020-10-15 16:49:54,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:49:54,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:54,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:49:54,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:54,648 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:49:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:54,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:54,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 16:49:54,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196705252] [2020-10-15 16:49:54,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:49:54,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:54,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:49:54,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:49:54,684 INFO L87 Difference]: Start difference. First operand 106 states and 277 transitions. Second operand 28 states. [2020-10-15 16:49:57,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:57,625 INFO L93 Difference]: Finished difference Result 141 states and 343 transitions. [2020-10-15 16:49:57,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-15 16:49:57,627 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 16:49:57,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:57,627 INFO L225 Difference]: With dead ends: 141 [2020-10-15 16:49:57,627 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 16:49:57,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1723, Invalid=3827, Unknown=0, NotChecked=0, Total=5550 [2020-10-15 16:49:57,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 16:49:57,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 103. [2020-10-15 16:49:57,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-15 16:49:57,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 265 transitions. [2020-10-15 16:49:57,630 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 265 transitions. Word has length 31 [2020-10-15 16:49:57,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:57,630 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 265 transitions. [2020-10-15 16:49:57,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:49:57,630 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 265 transitions. [2020-10-15 16:49:57,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:49:57,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:57,631 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:57,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:49:57,831 INFO L429 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:57,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:57,832 INFO L82 PathProgramCache]: Analyzing trace with hash 470887608, now seen corresponding path program 309 times [2020-10-15 16:49:57,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:57,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656397650] [2020-10-15 16:49:57,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:57,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:58,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656397650] [2020-10-15 16:49:58,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466484751] [2020-10-15 16:49:58,638 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 [2020-10-15 16:49:58,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 16:49:58,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:58,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:49:58,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:58,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:58,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 16:49:58,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139542091] [2020-10-15 16:49:58,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:49:58,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:58,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:49:58,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:49:58,724 INFO L87 Difference]: Start difference. First operand 103 states and 265 transitions. Second operand 28 states. [2020-10-15 16:50:00,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:00,041 INFO L93 Difference]: Finished difference Result 164 states and 387 transitions. [2020-10-15 16:50:00,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:50:00,042 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 16:50:00,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:00,042 INFO L225 Difference]: With dead ends: 164 [2020-10-15 16:50:00,042 INFO L226 Difference]: Without dead ends: 158 [2020-10-15 16:50:00,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=841, Invalid=1915, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 16:50:00,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-15 16:50:00,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 105. [2020-10-15 16:50:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:50:00,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 16:50:00,044 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 16:50:00,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:00,044 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 16:50:00,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:50:00,045 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 16:50:00,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:50:00,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:00,045 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:00,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2020-10-15 16:50:00,246 INFO L429 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:00,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:00,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1353020644, now seen corresponding path program 310 times [2020-10-15 16:50:00,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:00,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625513642] [2020-10-15 16:50:00,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:01,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625513642] [2020-10-15 16:50:01,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688484255] [2020-10-15 16:50:01,054 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 [2020-10-15 16:50:01,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:50:01,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:50:01,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:50:01,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:01,156 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:50:01,173 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:01,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:01,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 16:50:01,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810316004] [2020-10-15 16:50:01,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:50:01,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:01,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:50:01,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:50:01,174 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 16:50:02,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:02,810 INFO L93 Difference]: Finished difference Result 161 states and 381 transitions. [2020-10-15 16:50:02,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:50:02,812 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 16:50:02,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:02,812 INFO L225 Difference]: With dead ends: 161 [2020-10-15 16:50:02,813 INFO L226 Difference]: Without dead ends: 155 [2020-10-15 16:50:02,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=897, Invalid=2183, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 16:50:02,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-15 16:50:02,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 104. [2020-10-15 16:50:02,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:50:02,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 16:50:02,815 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 16:50:02,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:02,816 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 16:50:02,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:50:02,816 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 16:50:02,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:50:02,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:02,816 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:03,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2020-10-15 16:50:03,017 INFO L429 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:03,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:03,017 INFO L82 PathProgramCache]: Analyzing trace with hash 2116672154, now seen corresponding path program 311 times [2020-10-15 16:50:03,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:03,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391594302] [2020-10-15 16:50:03,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:03,787 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:03,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391594302] [2020-10-15 16:50:03,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842954225] [2020-10-15 16:50:03,788 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 [2020-10-15 16:50:03,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 16:50:03,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:50:03,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:50:03,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:03,863 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:03,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:03,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 16:50:03,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351147950] [2020-10-15 16:50:03,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:50:03,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:03,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:50:03,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:50:03,865 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 16:50:05,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:05,357 INFO L93 Difference]: Finished difference Result 158 states and 375 transitions. [2020-10-15 16:50:05,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:50:05,359 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 16:50:05,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:05,359 INFO L225 Difference]: With dead ends: 158 [2020-10-15 16:50:05,359 INFO L226 Difference]: Without dead ends: 152 [2020-10-15 16:50:05,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=842, Invalid=2128, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 16:50:05,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-15 16:50:05,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 105. [2020-10-15 16:50:05,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:50:05,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 16:50:05,362 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 16:50:05,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:05,362 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 16:50:05,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:50:05,362 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 16:50:05,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:50:05,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:05,363 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:05,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2020-10-15 16:50:05,563 INFO L429 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:05,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:05,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1077903870, now seen corresponding path program 312 times [2020-10-15 16:50:05,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:05,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118417571] [2020-10-15 16:50:05,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:06,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118417571] [2020-10-15 16:50:06,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355525591] [2020-10-15 16:50:06,355 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 [2020-10-15 16:50:06,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 16:50:06,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:50:06,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:50:06,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:06,479 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:50:06,498 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:06,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:06,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 16:50:06,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858320456] [2020-10-15 16:50:06,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:50:06,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:06,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:50:06,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:50:06,500 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 16:50:08,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:08,218 INFO L93 Difference]: Finished difference Result 157 states and 373 transitions. [2020-10-15 16:50:08,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:50:08,220 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 16:50:08,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:08,220 INFO L225 Difference]: With dead ends: 157 [2020-10-15 16:50:08,221 INFO L226 Difference]: Without dead ends: 151 [2020-10-15 16:50:08,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=905, Invalid=2401, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 16:50:08,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-15 16:50:08,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 104. [2020-10-15 16:50:08,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:50:08,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 16:50:08,223 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 16:50:08,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:08,223 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 16:50:08,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:50:08,223 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 16:50:08,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:50:08,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:08,223 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:08,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2020-10-15 16:50:08,424 INFO L429 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:08,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:08,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1492687100, now seen corresponding path program 313 times [2020-10-15 16:50:08,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:08,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345057804] [2020-10-15 16:50:08,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:08,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:09,160 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:09,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345057804] [2020-10-15 16:50:09,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452025084] [2020-10-15 16:50:09,160 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 [2020-10-15 16:50:09,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:09,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:50:09,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:09,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:09,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 16:50:09,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801203470] [2020-10-15 16:50:09,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:50:09,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:09,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:50:09,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:50:09,240 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 16:50:10,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:10,846 INFO L93 Difference]: Finished difference Result 154 states and 367 transitions. [2020-10-15 16:50:10,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:50:10,848 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 16:50:10,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:10,848 INFO L225 Difference]: With dead ends: 154 [2020-10-15 16:50:10,848 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 16:50:10,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=859, Invalid=2333, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 16:50:10,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 16:50:10,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 105. [2020-10-15 16:50:10,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:50:10,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 16:50:10,851 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 16:50:10,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:10,851 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 16:50:10,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:50:10,851 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 16:50:10,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:50:10,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:10,851 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:11,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:50:11,052 INFO L429 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:11,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:11,053 INFO L82 PathProgramCache]: Analyzing trace with hash -229062304, now seen corresponding path program 314 times [2020-10-15 16:50:11,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:11,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374132626] [2020-10-15 16:50:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:11,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374132626] [2020-10-15 16:50:11,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723384044] [2020-10-15 16:50:11,802 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 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 [2020-10-15 16:50:11,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:50:11,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:50:11,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:50:11,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:11,908 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:50:11,931 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:11,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:11,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 16:50:11,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475507408] [2020-10-15 16:50:11,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:50:11,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:11,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:50:11,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:50:11,932 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 16:50:13,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:13,921 INFO L93 Difference]: Finished difference Result 153 states and 365 transitions. [2020-10-15 16:50:13,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:50:13,923 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 16:50:13,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:13,924 INFO L225 Difference]: With dead ends: 153 [2020-10-15 16:50:13,924 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 16:50:13,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:50:13,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 16:50:13,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 104. [2020-10-15 16:50:13,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:50:13,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 16:50:13,927 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 16:50:13,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:13,927 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 16:50:13,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:50:13,927 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 16:50:13,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:50:13,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:13,927 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:14,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2020-10-15 16:50:14,128 INFO L429 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:14,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:14,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1412986914, now seen corresponding path program 315 times [2020-10-15 16:50:14,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:14,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604542502] [2020-10-15 16:50:14,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:14,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:14,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604542502] [2020-10-15 16:50:14,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203998896] [2020-10-15 16:50:14,910 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 [2020-10-15 16:50:14,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 16:50:14,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:50:14,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:50:14,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:15,003 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:15,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:15,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 16:50:15,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051342108] [2020-10-15 16:50:15,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:50:15,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:15,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:50:15,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:50:15,005 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 16:50:16,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:16,800 INFO L93 Difference]: Finished difference Result 150 states and 359 transitions. [2020-10-15 16:50:16,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:50:16,802 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 16:50:16,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:16,802 INFO L225 Difference]: With dead ends: 150 [2020-10-15 16:50:16,803 INFO L226 Difference]: Without dead ends: 144 [2020-10-15 16:50:16,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=892, Invalid=2530, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 16:50:16,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-15 16:50:16,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 105. [2020-10-15 16:50:16,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:50:16,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 16:50:16,805 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 16:50:16,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:16,805 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 16:50:16,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:50:16,805 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 16:50:16,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:50:16,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:16,806 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:17,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2020-10-15 16:50:17,007 INFO L429 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:17,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:17,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1333821762, now seen corresponding path program 316 times [2020-10-15 16:50:17,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:17,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832552702] [2020-10-15 16:50:17,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:17,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832552702] [2020-10-15 16:50:17,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610933480] [2020-10-15 16:50:17,833 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 [2020-10-15 16:50:17,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:50:17,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:50:17,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:50:17,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:17,945 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:50:17,971 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:17,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:17,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 16:50:17,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49059661] [2020-10-15 16:50:17,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:50:17,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:17,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:50:17,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:50:17,972 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 16:50:20,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:20,199 INFO L93 Difference]: Finished difference Result 149 states and 357 transitions. [2020-10-15 16:50:20,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:50:20,201 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 16:50:20,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:20,202 INFO L225 Difference]: With dead ends: 149 [2020-10-15 16:50:20,202 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 16:50:20,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=969, Invalid=2813, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 16:50:20,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 16:50:20,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2020-10-15 16:50:20,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:50:20,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 16:50:20,204 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 16:50:20,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:20,204 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 16:50:20,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:50:20,204 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 16:50:20,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:50:20,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:20,205 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:20,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable317 [2020-10-15 16:50:20,406 INFO L429 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:20,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:20,406 INFO L82 PathProgramCache]: Analyzing trace with hash 32032576, now seen corresponding path program 317 times [2020-10-15 16:50:20,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:20,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862491978] [2020-10-15 16:50:20,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:20,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:21,097 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:21,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862491978] [2020-10-15 16:50:21,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734993545] [2020-10-15 16:50:21,098 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 [2020-10-15 16:50:21,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 16:50:21,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:50:21,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:50:21,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:21,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:21,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 16:50:21,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881961805] [2020-10-15 16:50:21,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:50:21,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:21,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:50:21,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:50:21,190 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 16:50:23,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:23,047 INFO L93 Difference]: Finished difference Result 146 states and 351 transitions. [2020-10-15 16:50:23,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:50:23,049 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 16:50:23,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:23,050 INFO L225 Difference]: With dead ends: 146 [2020-10-15 16:50:23,050 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 16:50:23,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=941, Invalid=2719, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 16:50:23,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 16:50:23,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 105. [2020-10-15 16:50:23,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:50:23,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 16:50:23,052 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 16:50:23,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:23,053 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 16:50:23,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:50:23,053 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 16:50:23,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:50:23,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:23,053 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:23,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:50:23,254 INFO L429 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:23,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:23,254 INFO L82 PathProgramCache]: Analyzing trace with hash -778516060, now seen corresponding path program 318 times [2020-10-15 16:50:23,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:23,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646988301] [2020-10-15 16:50:23,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:23,966 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:23,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646988301] [2020-10-15 16:50:23,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967585008] [2020-10-15 16:50:23,967 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 [2020-10-15 16:50:24,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 16:50:24,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:50:24,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:50:24,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:24,078 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:50:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:24,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:24,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 16:50:24,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771193087] [2020-10-15 16:50:24,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:50:24,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:24,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:50:24,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:50:24,104 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 16:50:26,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:26,362 INFO L93 Difference]: Finished difference Result 145 states and 349 transitions. [2020-10-15 16:50:26,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:50:26,364 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 16:50:26,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:26,370 INFO L225 Difference]: With dead ends: 145 [2020-10-15 16:50:26,370 INFO L226 Difference]: Without dead ends: 139 [2020-10-15 16:50:26,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 16:50:26,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-15 16:50:26,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 104. [2020-10-15 16:50:26,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:50:26,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 16:50:26,372 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 16:50:26,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:26,372 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 16:50:26,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:50:26,372 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 16:50:26,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:50:26,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:26,373 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:26,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:50:26,573 INFO L429 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:26,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:26,574 INFO L82 PathProgramCache]: Analyzing trace with hash -726239454, now seen corresponding path program 319 times [2020-10-15 16:50:26,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:26,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374053666] [2020-10-15 16:50:26,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:27,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374053666] [2020-10-15 16:50:27,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108083449] [2020-10-15 16:50:27,263 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 [2020-10-15 16:50:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:27,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:50:27,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:27,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:27,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 16:50:27,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606658253] [2020-10-15 16:50:27,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:50:27,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:27,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:50:27,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:50:27,346 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 16:50:29,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:29,431 INFO L93 Difference]: Finished difference Result 142 states and 343 transitions. [2020-10-15 16:50:29,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:50:29,433 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 16:50:29,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:29,434 INFO L225 Difference]: With dead ends: 142 [2020-10-15 16:50:29,434 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 16:50:29,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1006, Invalid=2900, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 16:50:29,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 16:50:29,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 105. [2020-10-15 16:50:29,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:50:29,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 16:50:29,437 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 16:50:29,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:29,437 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 16:50:29,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:50:29,437 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 16:50:29,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:50:29,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:29,437 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:29,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2020-10-15 16:50:29,638 INFO L429 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:29,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:29,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1150009990, now seen corresponding path program 320 times [2020-10-15 16:50:29,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:29,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585722132] [2020-10-15 16:50:29,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:30,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585722132] [2020-10-15 16:50:30,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013477407] [2020-10-15 16:50:30,399 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 [2020-10-15 16:50:30,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:50:30,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:50:30,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:50:30,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:30,513 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:50:30,542 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:30,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:30,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 16:50:30,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780923026] [2020-10-15 16:50:30,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:50:30,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:30,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:50:30,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:50:30,544 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 16:50:33,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:33,217 INFO L93 Difference]: Finished difference Result 141 states and 341 transitions. [2020-10-15 16:50:33,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 16:50:33,219 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 16:50:33,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:33,219 INFO L225 Difference]: With dead ends: 141 [2020-10-15 16:50:33,220 INFO L226 Difference]: Without dead ends: 135 [2020-10-15 16:50:33,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1097, Invalid=3193, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 16:50:33,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-15 16:50:33,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 104. [2020-10-15 16:50:33,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:50:33,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 16:50:33,222 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 16:50:33,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:33,222 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 16:50:33,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:50:33,222 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 16:50:33,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:50:33,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:33,223 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:33,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2020-10-15 16:50:33,423 INFO L429 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:33,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:33,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1838331780, now seen corresponding path program 321 times [2020-10-15 16:50:33,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:33,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355419705] [2020-10-15 16:50:33,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:34,119 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:34,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355419705] [2020-10-15 16:50:34,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204006454] [2020-10-15 16:50:34,120 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 [2020-10-15 16:50:34,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 16:50:34,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:50:34,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:50:34,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:34,224 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:34,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:34,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 16:50:34,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128944737] [2020-10-15 16:50:34,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:50:34,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:34,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:50:34,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:50:34,225 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 16:50:36,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:36,606 INFO L93 Difference]: Finished difference Result 138 states and 335 transitions. [2020-10-15 16:50:36,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 16:50:36,608 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 16:50:36,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:36,609 INFO L225 Difference]: With dead ends: 138 [2020-10-15 16:50:36,609 INFO L226 Difference]: Without dead ends: 132 [2020-10-15 16:50:36,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1087, Invalid=3073, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 16:50:36,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-15 16:50:36,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 105. [2020-10-15 16:50:36,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:50:36,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 16:50:36,611 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 16:50:36,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:36,611 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 16:50:36,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:50:36,611 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 16:50:36,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:50:36,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:36,612 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:36,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2020-10-15 16:50:36,813 INFO L429 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:36,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:36,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1471443992, now seen corresponding path program 322 times [2020-10-15 16:50:36,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:36,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464871174] [2020-10-15 16:50:36,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:37,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464871174] [2020-10-15 16:50:37,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535366794] [2020-10-15 16:50:37,590 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 [2020-10-15 16:50:37,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:50:37,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:50:37,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:50:37,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:37,697 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:50:37,730 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:37,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:37,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 16:50:37,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264618802] [2020-10-15 16:50:37,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:50:37,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:37,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:50:37,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:50:37,731 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 16:50:40,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:40,660 INFO L93 Difference]: Finished difference Result 137 states and 333 transitions. [2020-10-15 16:50:40,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 16:50:40,662 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 16:50:40,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:40,663 INFO L225 Difference]: With dead ends: 137 [2020-10-15 16:50:40,663 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 16:50:40,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1185, Invalid=3371, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 16:50:40,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 16:50:40,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 104. [2020-10-15 16:50:40,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:50:40,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 16:50:40,665 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 16:50:40,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:40,666 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 16:50:40,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:50:40,666 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 16:50:40,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:50:40,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:40,666 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:40,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2020-10-15 16:50:40,874 INFO L429 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:40,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:40,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1206364262, now seen corresponding path program 323 times [2020-10-15 16:50:40,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:40,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168951937] [2020-10-15 16:50:40,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:40,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:41,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168951937] [2020-10-15 16:50:41,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158554323] [2020-10-15 16:50:41,570 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 [2020-10-15 16:50:41,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 16:50:41,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:50:41,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:50:41,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:41,669 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:41,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:41,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 16:50:41,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817473871] [2020-10-15 16:50:41,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:50:41,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:41,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:50:41,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:50:41,670 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 16:50:44,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:44,283 INFO L93 Difference]: Finished difference Result 134 states and 327 transitions. [2020-10-15 16:50:44,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 16:50:44,286 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 16:50:44,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:44,286 INFO L225 Difference]: With dead ends: 134 [2020-10-15 16:50:44,287 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 16:50:44,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1184, Invalid=3238, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 16:50:44,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 16:50:44,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 105. [2020-10-15 16:50:44,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:50:44,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 16:50:44,289 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 16:50:44,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:44,290 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 16:50:44,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:50:44,290 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 16:50:44,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:50:44,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:44,290 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:44,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:50:44,491 INFO L429 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:44,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:44,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1831713334, now seen corresponding path program 324 times [2020-10-15 16:50:44,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:44,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542081510] [2020-10-15 16:50:44,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:44,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:45,267 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:45,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542081510] [2020-10-15 16:50:45,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577714060] [2020-10-15 16:50:45,268 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 [2020-10-15 16:50:45,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 16:50:45,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:50:45,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:50:45,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:45,388 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:50:45,422 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:45,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:45,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 16:50:45,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836525155] [2020-10-15 16:50:45,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:50:45,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:45,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:50:45,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:50:45,423 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 16:50:48,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:48,584 INFO L93 Difference]: Finished difference Result 133 states and 325 transitions. [2020-10-15 16:50:48,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 16:50:48,586 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 16:50:48,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:48,587 INFO L225 Difference]: With dead ends: 133 [2020-10-15 16:50:48,587 INFO L226 Difference]: Without dead ends: 127 [2020-10-15 16:50:48,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1289, Invalid=3541, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 16:50:48,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-15 16:50:48,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 104. [2020-10-15 16:50:48,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:50:48,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 16:50:48,589 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 16:50:48,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:48,589 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 16:50:48,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:50:48,589 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 16:50:48,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:50:48,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:48,589 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:48,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2020-10-15 16:50:48,790 INFO L429 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:48,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:48,791 INFO L82 PathProgramCache]: Analyzing trace with hash -215520824, now seen corresponding path program 325 times [2020-10-15 16:50:48,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:48,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987120622] [2020-10-15 16:50:48,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:49,552 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:49,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987120622] [2020-10-15 16:50:49,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439452182] [2020-10-15 16:50:49,553 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 [2020-10-15 16:50:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:49,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:50:49,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:49,675 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:49,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:49,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 16:50:49,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62489539] [2020-10-15 16:50:49,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:50:49,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:49,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:50:49,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:50:49,676 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 16:50:52,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:52,336 INFO L93 Difference]: Finished difference Result 130 states and 319 transitions. [2020-10-15 16:50:52,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 16:50:52,338 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 16:50:52,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:52,339 INFO L225 Difference]: With dead ends: 130 [2020-10-15 16:50:52,339 INFO L226 Difference]: Without dead ends: 124 [2020-10-15 16:50:52,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1297, Invalid=3395, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 16:50:52,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-15 16:50:52,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 105. [2020-10-15 16:50:52,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:50:52,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 16:50:52,342 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 16:50:52,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:52,342 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 16:50:52,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:50:52,342 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 16:50:52,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:50:52,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:52,342 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:52,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:50:52,543 INFO L429 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:52,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:52,543 INFO L82 PathProgramCache]: Analyzing trace with hash 304222252, now seen corresponding path program 326 times [2020-10-15 16:50:52,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:52,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774869857] [2020-10-15 16:50:52,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:53,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774869857] [2020-10-15 16:50:53,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020720128] [2020-10-15 16:50:53,319 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 [2020-10-15 16:50:53,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:50:53,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:50:53,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:50:53,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:53,434 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:50:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:53,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:53,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 16:50:53,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531490493] [2020-10-15 16:50:53,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:50:53,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:53,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:50:53,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:50:53,474 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 16:50:56,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:56,914 INFO L93 Difference]: Finished difference Result 129 states and 317 transitions. [2020-10-15 16:50:56,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 16:50:56,916 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 16:50:56,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:56,917 INFO L225 Difference]: With dead ends: 129 [2020-10-15 16:50:56,917 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 16:50:56,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1409, Invalid=3703, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 16:50:56,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 16:50:56,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2020-10-15 16:50:56,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:50:56,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 16:50:56,919 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 16:50:56,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:56,919 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 16:50:56,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:50:56,919 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 16:50:56,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:50:56,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:56,919 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:57,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2020-10-15 16:50:57,120 INFO L429 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:57,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:57,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1959533482, now seen corresponding path program 327 times [2020-10-15 16:50:57,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:57,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48605013] [2020-10-15 16:50:57,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:57,889 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:57,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48605013] [2020-10-15 16:50:57,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319213017] [2020-10-15 16:50:57,890 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 [2020-10-15 16:50:57,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 16:50:57,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:50:57,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:50:57,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:58,002 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:58,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:58,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 16:50:58,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171328276] [2020-10-15 16:50:58,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:50:58,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:58,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:50:58,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:50:58,004 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 16:51:01,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:51:01,022 INFO L93 Difference]: Finished difference Result 126 states and 311 transitions. [2020-10-15 16:51:01,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 16:51:01,024 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 16:51:01,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:51:01,024 INFO L225 Difference]: With dead ends: 126 [2020-10-15 16:51:01,024 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 16:51:01,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1426, Invalid=3544, Unknown=0, NotChecked=0, Total=4970 [2020-10-15 16:51:01,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 16:51:01,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 105. [2020-10-15 16:51:01,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:51:01,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 16:51:01,027 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 16:51:01,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:51:01,027 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 16:51:01,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:51:01,027 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 16:51:01,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:51:01,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:51:01,027 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:51:01,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:51:01,228 INFO L429 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:51:01,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:51:01,228 INFO L82 PathProgramCache]: Analyzing trace with hash 239405838, now seen corresponding path program 328 times [2020-10-15 16:51:01,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:51:01,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423053894] [2020-10-15 16:51:01,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:51:01,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:02,005 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:02,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423053894] [2020-10-15 16:51:02,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38836603] [2020-10-15 16:51:02,005 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 [2020-10-15 16:51:02,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:51:02,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:51:02,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:51:02,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:51:02,126 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:51:02,161 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:02,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:51:02,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 16:51:02,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130861159] [2020-10-15 16:51:02,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:51:02,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:51:02,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:51:02,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:51:02,162 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 16:51:05,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:51:05,917 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-10-15 16:51:05,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 16:51:05,919 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 16:51:05,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:51:05,920 INFO L225 Difference]: With dead ends: 125 [2020-10-15 16:51:05,920 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 16:51:05,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1545, Invalid=3857, Unknown=0, NotChecked=0, Total=5402 [2020-10-15 16:51:05,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 16:51:05,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 104. [2020-10-15 16:51:05,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:51:05,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 16:51:05,922 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 16:51:05,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:51:05,922 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 16:51:05,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:51:05,923 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 16:51:05,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:51:05,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:51:05,923 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:51:06,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2020-10-15 16:51:06,124 INFO L429 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:51:06,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:51:06,124 INFO L82 PathProgramCache]: Analyzing trace with hash 710401548, now seen corresponding path program 329 times [2020-10-15 16:51:06,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:51:06,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581866732] [2020-10-15 16:51:06,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:51:06,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:06,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581866732] [2020-10-15 16:51:06,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666477939] [2020-10-15 16:51:06,903 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 [2020-10-15 16:51:06,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 16:51:06,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:51:06,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:51:06,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:51:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:07,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:51:07,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 16:51:07,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465778209] [2020-10-15 16:51:07,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:51:07,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:51:07,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:51:07,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:51:07,023 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 16:51:10,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:51:10,238 INFO L93 Difference]: Finished difference Result 122 states and 303 transitions. [2020-10-15 16:51:10,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-15 16:51:10,241 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 16:51:10,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:51:10,241 INFO L225 Difference]: With dead ends: 122 [2020-10-15 16:51:10,241 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 16:51:10,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1571, Invalid=3685, Unknown=0, NotChecked=0, Total=5256 [2020-10-15 16:51:10,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 16:51:10,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2020-10-15 16:51:10,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:51:10,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 16:51:10,244 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 16:51:10,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:51:10,244 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 16:51:10,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:51:10,244 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 16:51:10,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:51:10,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:51:10,245 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:51:10,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:51:10,445 INFO L429 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:51:10,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:51:10,446 INFO L82 PathProgramCache]: Analyzing trace with hash 726488688, now seen corresponding path program 330 times [2020-10-15 16:51:10,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:51:10,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214496344] [2020-10-15 16:51:10,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:51:10,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:11,244 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:11,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214496344] [2020-10-15 16:51:11,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673807588] [2020-10-15 16:51:11,244 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 [2020-10-15 16:51:11,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 16:51:11,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:51:11,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:51:11,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:51:11,370 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:51:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:11,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:51:11,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 16:51:11,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412064485] [2020-10-15 16:51:11,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:51:11,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:51:11,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:51:11,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:51:11,414 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 16:51:15,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:51:15,449 INFO L93 Difference]: Finished difference Result 121 states and 301 transitions. [2020-10-15 16:51:15,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-15 16:51:15,451 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 16:51:15,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:51:15,452 INFO L225 Difference]: With dead ends: 121 [2020-10-15 16:51:15,452 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 16:51:15,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1697, Invalid=4003, Unknown=0, NotChecked=0, Total=5700 [2020-10-15 16:51:15,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 16:51:15,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2020-10-15 16:51:15,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:51:15,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 16:51:15,454 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 16:51:15,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:51:15,455 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 16:51:15,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:51:15,455 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 16:51:15,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:51:15,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:51:15,455 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:51:15,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:51:15,656 INFO L429 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:51:15,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:51:15,656 INFO L82 PathProgramCache]: Analyzing trace with hash 726978798, now seen corresponding path program 331 times [2020-10-15 16:51:15,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:51:15,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161228078] [2020-10-15 16:51:15,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:51:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:16,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161228078] [2020-10-15 16:51:16,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395610304] [2020-10-15 16:51:16,469 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 [2020-10-15 16:51:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:16,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:51:16,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:51:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:16,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:51:16,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 16:51:16,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178106327] [2020-10-15 16:51:16,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:51:16,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:51:16,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:51:16,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:51:16,582 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 16:51:20,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:51:20,008 INFO L93 Difference]: Finished difference Result 137 states and 341 transitions. [2020-10-15 16:51:20,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 16:51:20,010 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 16:51:20,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:51:20,011 INFO L225 Difference]: With dead ends: 137 [2020-10-15 16:51:20,011 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 16:51:20,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1732, Invalid=3818, Unknown=0, NotChecked=0, Total=5550 [2020-10-15 16:51:20,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 16:51:20,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 108. [2020-10-15 16:51:20,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-15 16:51:20,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 281 transitions. [2020-10-15 16:51:20,014 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 281 transitions. Word has length 32 [2020-10-15 16:51:20,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:51:20,014 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 281 transitions. [2020-10-15 16:51:20,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:51:20,015 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 281 transitions. [2020-10-15 16:51:20,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:51:20,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:51:20,015 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:51:20,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2020-10-15 16:51:20,216 INFO L429 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:51:20,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:51:20,216 INFO L82 PathProgramCache]: Analyzing trace with hash 726995538, now seen corresponding path program 332 times [2020-10-15 16:51:20,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:51:20,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463305453] [2020-10-15 16:51:20,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:51:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:21,013 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:21,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463305453] [2020-10-15 16:51:21,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886247581] [2020-10-15 16:51:21,014 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 [2020-10-15 16:51:21,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:51:21,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:51:21,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:51:21,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:51:21,133 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:51:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:21,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:51:21,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 16:51:21,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902795290] [2020-10-15 16:51:21,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:51:21,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:51:21,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:51:21,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:51:21,179 INFO L87 Difference]: Start difference. First operand 108 states and 281 transitions. Second operand 29 states. [2020-10-15 16:51:25,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:51:25,362 INFO L93 Difference]: Finished difference Result 118 states and 297 transitions. [2020-10-15 16:51:25,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-15 16:51:25,365 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 16:51:25,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:51:25,366 INFO L225 Difference]: With dead ends: 118 [2020-10-15 16:51:25,366 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 16:51:25,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1865, Invalid=4141, Unknown=0, NotChecked=0, Total=6006 [2020-10-15 16:51:25,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 16:51:25,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 77. [2020-10-15 16:51:25,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 16:51:25,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 188 transitions. [2020-10-15 16:51:25,368 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 188 transitions. Word has length 32 [2020-10-15 16:51:25,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:51:25,368 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 188 transitions. [2020-10-15 16:51:25,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:51:25,369 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 188 transitions. [2020-10-15 16:51:25,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:51:25,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:51:25,369 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:51:25,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2020-10-15 16:51:25,570 INFO L429 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:51:25,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:51:25,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1262879060, now seen corresponding path program 333 times [2020-10-15 16:51:25,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:51:25,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210929052] [2020-10-15 16:51:25,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:51:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:26,414 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:26,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210929052] [2020-10-15 16:51:26,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653288927] [2020-10-15 16:51:26,415 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 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:51:26,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 16:51:26,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:51:26,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:51:26,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:51:26,543 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:51:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:26,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:51:26,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 16:51:26,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80351915] [2020-10-15 16:51:26,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:51:26,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:51:26,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:51:26,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:51:26,608 INFO L87 Difference]: Start difference. First operand 77 states and 188 transitions. Second operand 29 states. [2020-10-15 16:51:30,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:51:30,554 INFO L93 Difference]: Finished difference Result 140 states and 343 transitions. [2020-10-15 16:51:30,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 16:51:30,556 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 16:51:30,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:51:30,557 INFO L225 Difference]: With dead ends: 140 [2020-10-15 16:51:30,557 INFO L226 Difference]: Without dead ends: 135 [2020-10-15 16:51:30,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1930, Invalid=4076, Unknown=0, NotChecked=0, Total=6006 [2020-10-15 16:51:30,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-15 16:51:30,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2020-10-15 16:51:30,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-15 16:51:30,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 273 transitions. [2020-10-15 16:51:30,559 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 273 transitions. Word has length 32 [2020-10-15 16:51:30,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:51:30,560 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 273 transitions. [2020-10-15 16:51:30,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:51:30,560 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 273 transitions. [2020-10-15 16:51:30,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:51:30,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:51:30,560 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:51:30,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2020-10-15 16:51:30,761 INFO L429 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:51:30,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:51:30,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1062041505, now seen corresponding path program 334 times [2020-10-15 16:51:30,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:51:30,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590333825] [2020-10-15 16:51:30,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:51:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:31,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590333825] [2020-10-15 16:51:31,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725057286] [2020-10-15 16:51:31,647 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 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:51:31,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:51:31,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:51:31,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:51:31,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:51:31,773 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:51:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:31,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:51:31,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:51:31,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664265289] [2020-10-15 16:51:31,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:51:31,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:51:31,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:51:31,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:51:31,841 INFO L87 Difference]: Start difference. First operand 106 states and 273 transitions. Second operand 30 states. [2020-10-15 16:51:36,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:51:36,039 INFO L93 Difference]: Finished difference Result 114 states and 293 transitions. [2020-10-15 16:51:36,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 16:51:36,043 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:51:36,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:51:36,043 INFO L225 Difference]: With dead ends: 114 [2020-10-15 16:51:36,043 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 16:51:36,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1951, Invalid=4211, Unknown=0, NotChecked=0, Total=6162 [2020-10-15 16:51:36,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 16:51:36,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 78. [2020-10-15 16:51:36,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 16:51:36,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 192 transitions. [2020-10-15 16:51:36,046 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 192 transitions. Word has length 33 [2020-10-15 16:51:36,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:51:36,046 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 192 transitions. [2020-10-15 16:51:36,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:51:36,046 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 192 transitions. [2020-10-15 16:51:36,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:51:36,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:51:36,047 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:51:36,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:51:36,247 INFO L429 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:51:36,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:51:36,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1801619636, now seen corresponding path program 335 times [2020-10-15 16:51:36,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:51:36,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683572279] [2020-10-15 16:51:36,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:51:36,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:37,389 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:37,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683572279] [2020-10-15 16:51:37,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900492889] [2020-10-15 16:51:37,390 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 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:51:37,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 16:51:37,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:51:37,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:51:37,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:51:37,467 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:37,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:51:37,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 16:51:37,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975318969] [2020-10-15 16:51:37,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:51:37,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:51:37,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:51:37,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:51:37,468 INFO L87 Difference]: Start difference. First operand 78 states and 192 transitions. Second operand 29 states. [2020-10-15 16:51:39,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:51:39,312 INFO L93 Difference]: Finished difference Result 120 states and 279 transitions. [2020-10-15 16:51:39,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:51:39,315 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 16:51:39,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:51:39,316 INFO L225 Difference]: With dead ends: 120 [2020-10-15 16:51:39,316 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 16:51:39,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=913, Invalid=1949, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:51:39,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 16:51:39,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2020-10-15 16:51:39,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:51:39,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 211 transitions. [2020-10-15 16:51:39,318 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 211 transitions. Word has length 33 [2020-10-15 16:51:39,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:51:39,319 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 211 transitions. [2020-10-15 16:51:39,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:51:39,319 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 211 transitions. [2020-10-15 16:51:39,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:51:39,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:51:39,319 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:51:39,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2020-10-15 16:51:39,520 INFO L429 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:51:39,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:51:39,520 INFO L82 PathProgramCache]: Analyzing trace with hash 2064174256, now seen corresponding path program 336 times [2020-10-15 16:51:39,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:51:39,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017670238] [2020-10-15 16:51:39,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:51:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:40,725 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:40,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017670238] [2020-10-15 16:51:40,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269928705] [2020-10-15 16:51:40,726 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 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:51:40,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 16:51:40,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:51:40,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:51:40,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:51:40,859 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:51:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:40,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:51:40,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:51:40,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844489559] [2020-10-15 16:51:40,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:51:40,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:51:40,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:51:40,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:51:40,878 INFO L87 Difference]: Start difference. First operand 86 states and 211 transitions. Second operand 30 states. [2020-10-15 16:51:42,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:51:42,850 INFO L93 Difference]: Finished difference Result 146 states and 331 transitions. [2020-10-15 16:51:42,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:51:42,853 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:51:42,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:51:42,853 INFO L225 Difference]: With dead ends: 146 [2020-10-15 16:51:42,854 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 16:51:42,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=922, Invalid=2158, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 16:51:42,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 16:51:42,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 84. [2020-10-15 16:51:42,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 16:51:42,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 207 transitions. [2020-10-15 16:51:42,856 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 207 transitions. Word has length 33 [2020-10-15 16:51:42,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:51:42,856 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 207 transitions. [2020-10-15 16:51:42,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:51:42,857 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 207 transitions. [2020-10-15 16:51:42,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:51:42,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:51:42,857 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:51:43,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:51:43,059 INFO L429 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:51:43,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:51:43,059 INFO L82 PathProgramCache]: Analyzing trace with hash -750635858, now seen corresponding path program 337 times [2020-10-15 16:51:43,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:51:43,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205352479] [2020-10-15 16:51:43,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:51:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:44,250 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:44,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205352479] [2020-10-15 16:51:44,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401397970] [2020-10-15 16:51:44,251 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 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:51:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:44,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:51:44,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:51:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:44,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:51:44,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 16:51:44,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260148622] [2020-10-15 16:51:44,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:51:44,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:51:44,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:51:44,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:51:44,327 INFO L87 Difference]: Start difference. First operand 84 states and 207 transitions. Second operand 29 states. [2020-10-15 16:51:46,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:51:46,411 INFO L93 Difference]: Finished difference Result 147 states and 335 transitions. [2020-10-15 16:51:46,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:51:46,414 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 16:51:46,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:51:46,415 INFO L225 Difference]: With dead ends: 147 [2020-10-15 16:51:46,415 INFO L226 Difference]: Without dead ends: 141 [2020-10-15 16:51:46,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=922, Invalid=2270, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 16:51:46,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-15 16:51:46,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 87. [2020-10-15 16:51:46,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:51:46,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 215 transitions. [2020-10-15 16:51:46,418 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 215 transitions. Word has length 33 [2020-10-15 16:51:46,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:51:46,418 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 215 transitions. [2020-10-15 16:51:46,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:51:46,418 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 215 transitions. [2020-10-15 16:51:46,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:51:46,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:51:46,418 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:51:46,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2020-10-15 16:51:46,619 INFO L429 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:51:46,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:51:46,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1720423186, now seen corresponding path program 338 times [2020-10-15 16:51:46,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:51:46,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410685745] [2020-10-15 16:51:46,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:51:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:47,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410685745] [2020-10-15 16:51:47,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846010496] [2020-10-15 16:51:47,787 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 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:51:47,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:51:47,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:51:47,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:51:47,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:51:47,902 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:51:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:47,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:51:47,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:51:47,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101832627] [2020-10-15 16:51:47,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:51:47,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:51:47,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:51:47,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:51:47,925 INFO L87 Difference]: Start difference. First operand 87 states and 215 transitions. Second operand 30 states. [2020-10-15 16:51:50,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:51:50,137 INFO L93 Difference]: Finished difference Result 169 states and 379 transitions. [2020-10-15 16:51:50,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:51:50,141 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:51:50,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:51:50,141 INFO L225 Difference]: With dead ends: 169 [2020-10-15 16:51:50,142 INFO L226 Difference]: Without dead ends: 163 [2020-10-15 16:51:50,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=964, Invalid=2458, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 16:51:50,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-15 16:51:50,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 86. [2020-10-15 16:51:50,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:51:50,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 213 transitions. [2020-10-15 16:51:50,145 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 213 transitions. Word has length 33 [2020-10-15 16:51:50,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:51:50,145 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 213 transitions. [2020-10-15 16:51:50,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:51:50,145 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 213 transitions. [2020-10-15 16:51:50,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:51:50,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:51:50,145 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:51:50,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:51:50,346 INFO L429 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:51:50,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:51:50,347 INFO L82 PathProgramCache]: Analyzing trace with hash 895148688, now seen corresponding path program 339 times [2020-10-15 16:51:50,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:51:50,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611279916] [2020-10-15 16:51:50,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:51:50,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:51,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611279916] [2020-10-15 16:51:51,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43437067] [2020-10-15 16:51:51,460 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 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:51:51,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 16:51:51,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:51:51,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:51:51,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:51:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:51,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:51:51,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 16:51:51,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101053320] [2020-10-15 16:51:51,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:51:51,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:51:51,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:51:51,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:51:51,560 INFO L87 Difference]: Start difference. First operand 86 states and 213 transitions. Second operand 29 states. [2020-10-15 16:51:53,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:51:53,795 INFO L93 Difference]: Finished difference Result 169 states and 381 transitions. [2020-10-15 16:51:53,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:51:53,798 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 16:51:53,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:51:53,798 INFO L225 Difference]: With dead ends: 169 [2020-10-15 16:51:53,798 INFO L226 Difference]: Without dead ends: 163 [2020-10-15 16:51:53,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=978, Invalid=2562, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:51:53,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-15 16:51:53,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 89. [2020-10-15 16:51:53,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-15 16:51:53,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 221 transitions. [2020-10-15 16:51:53,801 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 221 transitions. Word has length 33 [2020-10-15 16:51:53,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:51:53,801 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 221 transitions. [2020-10-15 16:51:53,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:51:53,801 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 221 transitions. [2020-10-15 16:51:53,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:51:53,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:51:53,802 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:51:54,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:51:54,002 INFO L429 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:51:54,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:51:54,003 INFO L82 PathProgramCache]: Analyzing trace with hash -143619596, now seen corresponding path program 340 times [2020-10-15 16:51:54,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:51:54,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181671240] [2020-10-15 16:51:54,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:51:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:55,156 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:55,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181671240] [2020-10-15 16:51:55,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425771429] [2020-10-15 16:51:55,157 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 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:51:55,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:51:55,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:51:55,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:51:55,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:51:55,280 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:51:55,305 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:55,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:51:55,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:51:55,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518231105] [2020-10-15 16:51:55,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:51:55,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:51:55,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:51:55,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:51:55,306 INFO L87 Difference]: Start difference. First operand 89 states and 221 transitions. Second operand 30 states. [2020-10-15 16:51:57,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:51:57,454 INFO L93 Difference]: Finished difference Result 166 states and 375 transitions. [2020-10-15 16:51:57,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:51:57,457 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:51:57,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:51:57,457 INFO L225 Difference]: With dead ends: 166 [2020-10-15 16:51:57,457 INFO L226 Difference]: Without dead ends: 160 [2020-10-15 16:51:57,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=979, Invalid=2681, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 16:51:57,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-15 16:51:57,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 88. [2020-10-15 16:51:57,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 16:51:57,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 219 transitions. [2020-10-15 16:51:57,464 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 219 transitions. Word has length 33 [2020-10-15 16:51:57,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:51:57,464 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 219 transitions. [2020-10-15 16:51:57,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:51:57,464 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 219 transitions. [2020-10-15 16:51:57,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:51:57,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:51:57,465 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:51:57,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable341 [2020-10-15 16:51:57,666 INFO L429 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:51:57,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:51:57,666 INFO L82 PathProgramCache]: Analyzing trace with hash 271163634, now seen corresponding path program 341 times [2020-10-15 16:51:57,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:51:57,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675563584] [2020-10-15 16:51:57,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:51:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:58,550 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:58,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675563584] [2020-10-15 16:51:58,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470676596] [2020-10-15 16:51:58,551 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 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:51:58,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 16:51:58,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:51:58,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:51:58,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:51:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:58,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:51:58,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 16:51:58,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407688970] [2020-10-15 16:51:58,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:51:58,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:51:58,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:51:58,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:51:58,696 INFO L87 Difference]: Start difference. First operand 88 states and 219 transitions. Second operand 29 states. [2020-10-15 16:52:00,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:00,788 INFO L93 Difference]: Finished difference Result 167 states and 379 transitions. [2020-10-15 16:52:00,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:52:00,791 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 16:52:00,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:00,792 INFO L225 Difference]: With dead ends: 167 [2020-10-15 16:52:00,792 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 16:52:00,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1008, Invalid=2774, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 16:52:00,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 16:52:00,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 91. [2020-10-15 16:52:00,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 16:52:00,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 227 transitions. [2020-10-15 16:52:00,794 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 227 transitions. Word has length 33 [2020-10-15 16:52:00,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:00,795 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 227 transitions. [2020-10-15 16:52:00,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:52:00,795 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 227 transitions. [2020-10-15 16:52:00,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:52:00,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:00,795 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:00,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2020-10-15 16:52:00,996 INFO L429 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:00,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:00,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1450585770, now seen corresponding path program 342 times [2020-10-15 16:52:00,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:00,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237148369] [2020-10-15 16:52:00,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:01,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237148369] [2020-10-15 16:52:01,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093032174] [2020-10-15 16:52:01,964 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 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:52:02,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 16:52:02,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:52:02,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:52:02,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:02,071 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:52:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:02,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:02,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:52:02,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288716489] [2020-10-15 16:52:02,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:52:02,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:02,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:52:02,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:52:02,095 INFO L87 Difference]: Start difference. First operand 91 states and 227 transitions. Second operand 30 states. [2020-10-15 16:52:04,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:04,420 INFO L93 Difference]: Finished difference Result 164 states and 373 transitions. [2020-10-15 16:52:04,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:52:04,422 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:52:04,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:04,423 INFO L225 Difference]: With dead ends: 164 [2020-10-15 16:52:04,423 INFO L226 Difference]: Without dead ends: 158 [2020-10-15 16:52:04,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1010, Invalid=2896, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 16:52:04,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-15 16:52:04,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 90. [2020-10-15 16:52:04,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 16:52:04,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 225 transitions. [2020-10-15 16:52:04,426 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 225 transitions. Word has length 33 [2020-10-15 16:52:04,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:04,426 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 225 transitions. [2020-10-15 16:52:04,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:52:04,426 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 225 transitions. [2020-10-15 16:52:04,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:52:04,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:04,427 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:04,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2020-10-15 16:52:04,628 INFO L429 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:04,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:04,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1660456916, now seen corresponding path program 343 times [2020-10-15 16:52:04,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:04,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54992895] [2020-10-15 16:52:04,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:05,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54992895] [2020-10-15 16:52:05,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750242943] [2020-10-15 16:52:05,556 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 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:52:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:05,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:52:05,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:05,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:05,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 16:52:05,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171794232] [2020-10-15 16:52:05,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:52:05,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:05,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:52:05,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:52:05,644 INFO L87 Difference]: Start difference. First operand 90 states and 225 transitions. Second operand 29 states. [2020-10-15 16:52:08,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:08,010 INFO L93 Difference]: Finished difference Result 165 states and 377 transitions. [2020-10-15 16:52:08,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:52:08,014 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 16:52:08,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:08,014 INFO L225 Difference]: With dead ends: 165 [2020-10-15 16:52:08,014 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 16:52:08,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1054, Invalid=2978, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 16:52:08,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 16:52:08,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 93. [2020-10-15 16:52:08,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:52:08,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-10-15 16:52:08,016 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 33 [2020-10-15 16:52:08,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:08,016 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-10-15 16:52:08,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:52:08,017 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-10-15 16:52:08,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:52:08,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:08,017 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:08,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2020-10-15 16:52:08,218 INFO L429 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:08,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:08,218 INFO L82 PathProgramCache]: Analyzing trace with hash 112298296, now seen corresponding path program 344 times [2020-10-15 16:52:08,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:08,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125571286] [2020-10-15 16:52:08,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:09,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125571286] [2020-10-15 16:52:09,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955159760] [2020-10-15 16:52:09,233 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 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:52:09,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:52:09,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:52:09,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:52:09,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:09,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:52:09,378 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:09,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:09,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:52:09,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853751284] [2020-10-15 16:52:09,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:52:09,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:09,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:52:09,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:52:09,380 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 30 states. [2020-10-15 16:52:12,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:12,160 INFO L93 Difference]: Finished difference Result 162 states and 371 transitions. [2020-10-15 16:52:12,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:52:12,164 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:52:12,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:12,164 INFO L225 Difference]: With dead ends: 162 [2020-10-15 16:52:12,165 INFO L226 Difference]: Without dead ends: 156 [2020-10-15 16:52:12,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1057, Invalid=3103, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 16:52:12,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-15 16:52:12,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 92. [2020-10-15 16:52:12,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:52:12,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 231 transitions. [2020-10-15 16:52:12,167 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 231 transitions. Word has length 33 [2020-10-15 16:52:12,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:12,168 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 231 transitions. [2020-10-15 16:52:12,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:52:12,168 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 231 transitions. [2020-10-15 16:52:12,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:52:12,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:12,168 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:12,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2020-10-15 16:52:12,369 INFO L429 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:12,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:12,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1189490890, now seen corresponding path program 345 times [2020-10-15 16:52:12,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:12,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186799635] [2020-10-15 16:52:12,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:13,281 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:13,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186799635] [2020-10-15 16:52:13,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133424416] [2020-10-15 16:52:13,282 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 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:52:13,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 16:52:13,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:52:13,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:52:13,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:13,379 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:13,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:13,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 16:52:13,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398364889] [2020-10-15 16:52:13,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:52:13,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:13,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:52:13,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:52:13,380 INFO L87 Difference]: Start difference. First operand 92 states and 231 transitions. Second operand 29 states. [2020-10-15 16:52:15,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:15,777 INFO L93 Difference]: Finished difference Result 163 states and 375 transitions. [2020-10-15 16:52:15,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 16:52:15,782 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 16:52:15,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:15,782 INFO L225 Difference]: With dead ends: 163 [2020-10-15 16:52:15,782 INFO L226 Difference]: Without dead ends: 157 [2020-10-15 16:52:15,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1116, Invalid=3174, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 16:52:15,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-15 16:52:15,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 95. [2020-10-15 16:52:15,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-15 16:52:15,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 239 transitions. [2020-10-15 16:52:15,785 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 239 transitions. Word has length 33 [2020-10-15 16:52:15,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:15,785 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 239 transitions. [2020-10-15 16:52:15,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:52:15,785 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 239 transitions. [2020-10-15 16:52:15,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:52:15,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:15,786 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:15,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2020-10-15 16:52:15,986 INFO L429 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:15,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:15,987 INFO L82 PathProgramCache]: Analyzing trace with hash -2000039526, now seen corresponding path program 346 times [2020-10-15 16:52:15,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:15,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220253549] [2020-10-15 16:52:15,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:17,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220253549] [2020-10-15 16:52:17,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197194937] [2020-10-15 16:52:17,024 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 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:52:17,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:52:17,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:52:17,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:52:17,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:17,145 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:52:17,176 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:17,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:17,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:52:17,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015523201] [2020-10-15 16:52:17,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:52:17,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:17,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:52:17,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:52:17,177 INFO L87 Difference]: Start difference. First operand 95 states and 239 transitions. Second operand 30 states. [2020-10-15 16:52:20,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:20,116 INFO L93 Difference]: Finished difference Result 160 states and 369 transitions. [2020-10-15 16:52:20,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 16:52:20,120 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:52:20,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:20,121 INFO L225 Difference]: With dead ends: 160 [2020-10-15 16:52:20,121 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 16:52:20,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1120, Invalid=3302, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 16:52:20,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 16:52:20,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 94. [2020-10-15 16:52:20,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 16:52:20,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 237 transitions. [2020-10-15 16:52:20,124 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 237 transitions. Word has length 33 [2020-10-15 16:52:20,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:20,125 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 237 transitions. [2020-10-15 16:52:20,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:52:20,125 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 237 transitions. [2020-10-15 16:52:20,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:52:20,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:20,125 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:20,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:52:20,326 INFO L429 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:20,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:20,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1947762920, now seen corresponding path program 347 times [2020-10-15 16:52:20,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:20,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426525521] [2020-10-15 16:52:20,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:21,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426525521] [2020-10-15 16:52:21,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802735359] [2020-10-15 16:52:21,372 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 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:52:21,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 16:52:21,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:52:21,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:52:21,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:21,469 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:21,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:21,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 16:52:21,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404513110] [2020-10-15 16:52:21,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:52:21,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:21,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:52:21,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:52:21,470 INFO L87 Difference]: Start difference. First operand 94 states and 237 transitions. Second operand 29 states. [2020-10-15 16:52:24,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:24,289 INFO L93 Difference]: Finished difference Result 161 states and 373 transitions. [2020-10-15 16:52:24,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 16:52:24,292 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 16:52:24,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:24,292 INFO L225 Difference]: With dead ends: 161 [2020-10-15 16:52:24,292 INFO L226 Difference]: Without dead ends: 155 [2020-10-15 16:52:24,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1194, Invalid=3362, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 16:52:24,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-15 16:52:24,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 97. [2020-10-15 16:52:24,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 16:52:24,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 245 transitions. [2020-10-15 16:52:24,295 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 245 transitions. Word has length 33 [2020-10-15 16:52:24,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:24,295 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 245 transitions. [2020-10-15 16:52:24,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:52:24,295 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 245 transitions. [2020-10-15 16:52:24,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:52:24,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:24,295 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:24,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2020-10-15 16:52:24,496 INFO L429 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:24,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:24,496 INFO L82 PathProgramCache]: Analyzing trace with hash -71513476, now seen corresponding path program 348 times [2020-10-15 16:52:24,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:24,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456443163] [2020-10-15 16:52:24,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:25,468 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:25,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456443163] [2020-10-15 16:52:25,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821111137] [2020-10-15 16:52:25,469 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 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:52:25,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 16:52:25,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:52:25,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:52:25,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:25,591 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:52:25,630 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:25,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:25,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:52:25,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911819090] [2020-10-15 16:52:25,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:52:25,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:25,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:52:25,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:52:25,631 INFO L87 Difference]: Start difference. First operand 97 states and 245 transitions. Second operand 30 states. [2020-10-15 16:52:28,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:28,611 INFO L93 Difference]: Finished difference Result 158 states and 367 transitions. [2020-10-15 16:52:28,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 16:52:28,613 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:52:28,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:28,614 INFO L225 Difference]: With dead ends: 158 [2020-10-15 16:52:28,614 INFO L226 Difference]: Without dead ends: 152 [2020-10-15 16:52:28,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1199, Invalid=3493, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 16:52:28,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-15 16:52:28,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 96. [2020-10-15 16:52:28,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 16:52:28,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 243 transitions. [2020-10-15 16:52:28,616 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 243 transitions. Word has length 33 [2020-10-15 16:52:28,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:28,617 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 243 transitions. [2020-10-15 16:52:28,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:52:28,617 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 243 transitions. [2020-10-15 16:52:28,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:52:28,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:28,617 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:28,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2020-10-15 16:52:28,825 INFO L429 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:28,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:28,826 INFO L82 PathProgramCache]: Analyzing trace with hash 616808314, now seen corresponding path program 349 times [2020-10-15 16:52:28,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:28,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318938413] [2020-10-15 16:52:28,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:29,763 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:29,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318938413] [2020-10-15 16:52:29,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770248108] [2020-10-15 16:52:29,764 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 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:52:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:29,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:52:29,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:29,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:29,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 16:52:29,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961167442] [2020-10-15 16:52:29,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:52:29,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:29,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:52:29,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:52:29,867 INFO L87 Difference]: Start difference. First operand 96 states and 243 transitions. Second operand 29 states. [2020-10-15 16:52:32,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:32,839 INFO L93 Difference]: Finished difference Result 159 states and 371 transitions. [2020-10-15 16:52:32,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 16:52:32,842 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 16:52:32,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:32,842 INFO L225 Difference]: With dead ends: 159 [2020-10-15 16:52:32,842 INFO L226 Difference]: Without dead ends: 153 [2020-10-15 16:52:32,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1288, Invalid=3542, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 16:52:32,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-15 16:52:32,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 99. [2020-10-15 16:52:32,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:52:32,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 251 transitions. [2020-10-15 16:52:32,845 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 251 transitions. Word has length 33 [2020-10-15 16:52:32,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:32,845 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 251 transitions. [2020-10-15 16:52:32,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:52:32,845 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 251 transitions. [2020-10-15 16:52:32,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:52:32,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:32,845 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:33,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:52:33,046 INFO L429 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:33,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:33,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1601999838, now seen corresponding path program 350 times [2020-10-15 16:52:33,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:33,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753510757] [2020-10-15 16:52:33,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:33,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753510757] [2020-10-15 16:52:33,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73567813] [2020-10-15 16:52:33,945 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 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:52:33,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:52:33,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:52:33,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:52:33,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:34,066 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:52:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:34,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:34,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:52:34,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883157410] [2020-10-15 16:52:34,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:52:34,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:34,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:52:34,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:52:34,106 INFO L87 Difference]: Start difference. First operand 99 states and 251 transitions. Second operand 30 states. [2020-10-15 16:52:37,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:37,485 INFO L93 Difference]: Finished difference Result 156 states and 365 transitions. [2020-10-15 16:52:37,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 16:52:37,488 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:52:37,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:37,488 INFO L225 Difference]: With dead ends: 156 [2020-10-15 16:52:37,488 INFO L226 Difference]: Without dead ends: 150 [2020-10-15 16:52:37,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1294, Invalid=3676, Unknown=0, NotChecked=0, Total=4970 [2020-10-15 16:52:37,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-15 16:52:37,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 98. [2020-10-15 16:52:37,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:52:37,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 249 transitions. [2020-10-15 16:52:37,491 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 249 transitions. Word has length 33 [2020-10-15 16:52:37,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:37,491 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 249 transitions. [2020-10-15 16:52:37,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:52:37,491 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 249 transitions. [2020-10-15 16:52:37,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:52:37,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:37,491 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:37,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:52:37,692 INFO L429 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:37,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:37,693 INFO L82 PathProgramCache]: Analyzing trace with hash -15159204, now seen corresponding path program 351 times [2020-10-15 16:52:37,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:37,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673620174] [2020-10-15 16:52:37,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:38,599 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:38,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673620174] [2020-10-15 16:52:38,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956894595] [2020-10-15 16:52:38,600 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 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:52:38,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 16:52:38,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:52:38,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:52:38,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:38,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:38,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 16:52:38,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131223951] [2020-10-15 16:52:38,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:52:38,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:38,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:52:38,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:52:38,712 INFO L87 Difference]: Start difference. First operand 98 states and 249 transitions. Second operand 29 states. [2020-10-15 16:52:41,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:41,453 INFO L93 Difference]: Finished difference Result 157 states and 369 transitions. [2020-10-15 16:52:41,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 16:52:41,456 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 16:52:41,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:41,456 INFO L225 Difference]: With dead ends: 157 [2020-10-15 16:52:41,456 INFO L226 Difference]: Without dead ends: 151 [2020-10-15 16:52:41,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1398, Invalid=3714, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 16:52:41,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-15 16:52:41,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 101. [2020-10-15 16:52:41,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 16:52:41,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 257 transitions. [2020-10-15 16:52:41,459 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 257 transitions. Word has length 33 [2020-10-15 16:52:41,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:41,459 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 257 transitions. [2020-10-15 16:52:41,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:52:41,459 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 257 transitions. [2020-10-15 16:52:41,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:52:41,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:41,460 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:41,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:52:41,661 INFO L429 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:41,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:41,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1241730496, now seen corresponding path program 352 times [2020-10-15 16:52:41,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:41,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301883442] [2020-10-15 16:52:41,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:42,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301883442] [2020-10-15 16:52:42,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978152518] [2020-10-15 16:52:42,478 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 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:52:42,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:52:42,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:52:42,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:52:42,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:42,595 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:52:42,631 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:42,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:42,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:52:42,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017922548] [2020-10-15 16:52:42,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:52:42,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:42,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:52:42,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:52:42,632 INFO L87 Difference]: Start difference. First operand 101 states and 257 transitions. Second operand 30 states. [2020-10-15 16:52:45,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:45,974 INFO L93 Difference]: Finished difference Result 154 states and 363 transitions. [2020-10-15 16:52:45,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 16:52:45,977 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:52:45,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:45,978 INFO L225 Difference]: With dead ends: 154 [2020-10-15 16:52:45,978 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 16:52:45,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1405, Invalid=3851, Unknown=0, NotChecked=0, Total=5256 [2020-10-15 16:52:45,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 16:52:45,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 100. [2020-10-15 16:52:45,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 16:52:45,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 255 transitions. [2020-10-15 16:52:45,981 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 255 transitions. Word has length 33 [2020-10-15 16:52:45,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:45,981 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 255 transitions. [2020-10-15 16:52:45,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:52:45,981 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 255 transitions. [2020-10-15 16:52:45,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:52:45,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:45,982 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:46,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2020-10-15 16:52:46,182 INFO L429 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:46,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:46,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1437044290, now seen corresponding path program 353 times [2020-10-15 16:52:46,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:46,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631151636] [2020-10-15 16:52:46,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:47,102 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:47,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631151636] [2020-10-15 16:52:47,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841230006] [2020-10-15 16:52:47,103 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 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:52:47,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 16:52:47,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:52:47,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:52:47,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:47,219 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:47,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:47,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 16:52:47,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490612812] [2020-10-15 16:52:47,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:52:47,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:47,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:52:47,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:52:47,220 INFO L87 Difference]: Start difference. First operand 100 states and 255 transitions. Second operand 29 states. [2020-10-15 16:52:50,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:50,338 INFO L93 Difference]: Finished difference Result 155 states and 367 transitions. [2020-10-15 16:52:50,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-15 16:52:50,341 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 16:52:50,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:50,341 INFO L225 Difference]: With dead ends: 155 [2020-10-15 16:52:50,341 INFO L226 Difference]: Without dead ends: 149 [2020-10-15 16:52:50,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1524, Invalid=3878, Unknown=0, NotChecked=0, Total=5402 [2020-10-15 16:52:50,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-15 16:52:50,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 103. [2020-10-15 16:52:50,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-15 16:52:50,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 263 transitions. [2020-10-15 16:52:50,344 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 263 transitions. Word has length 33 [2020-10-15 16:52:50,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:50,344 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 263 transitions. [2020-10-15 16:52:50,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:52:50,344 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 263 transitions. [2020-10-15 16:52:50,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:52:50,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:50,345 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:50,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2020-10-15 16:52:50,545 INFO L429 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:50,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:50,546 INFO L82 PathProgramCache]: Analyzing trace with hash -917301214, now seen corresponding path program 354 times [2020-10-15 16:52:50,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:50,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137419583] [2020-10-15 16:52:50,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:51,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137419583] [2020-10-15 16:52:51,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306763245] [2020-10-15 16:52:51,434 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 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:52:51,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 16:52:51,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:52:51,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:52:51,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:51,568 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:52:51,610 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:51,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:51,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:52:51,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596641020] [2020-10-15 16:52:51,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:52:51,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:51,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:52:51,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:52:51,612 INFO L87 Difference]: Start difference. First operand 103 states and 263 transitions. Second operand 30 states. [2020-10-15 16:52:55,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:55,713 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-10-15 16:52:55,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 16:52:55,716 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:52:55,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:55,716 INFO L225 Difference]: With dead ends: 152 [2020-10-15 16:52:55,716 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 16:52:55,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1532, Invalid=4018, Unknown=0, NotChecked=0, Total=5550 [2020-10-15 16:52:55,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 16:52:55,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 102. [2020-10-15 16:52:55,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-15 16:52:55,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 261 transitions. [2020-10-15 16:52:55,718 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 261 transitions. Word has length 33 [2020-10-15 16:52:55,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:55,719 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 261 transitions. [2020-10-15 16:52:55,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:52:55,719 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 261 transitions. [2020-10-15 16:52:55,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:52:55,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:55,719 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:55,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:52:55,920 INFO L429 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:55,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:55,920 INFO L82 PathProgramCache]: Analyzing trace with hash 738010016, now seen corresponding path program 355 times [2020-10-15 16:52:55,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:55,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244907353] [2020-10-15 16:52:55,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:55,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:56,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244907353] [2020-10-15 16:52:56,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069509765] [2020-10-15 16:52:56,942 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 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:52:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:56,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:52:56,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:57,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:57,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 16:52:57,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461982117] [2020-10-15 16:52:57,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:52:57,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:57,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:52:57,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:52:57,070 INFO L87 Difference]: Start difference. First operand 102 states and 261 transitions. Second operand 29 states. [2020-10-15 16:53:00,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:00,758 INFO L93 Difference]: Finished difference Result 153 states and 365 transitions. [2020-10-15 16:53:00,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 16:53:00,768 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 16:53:00,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:00,768 INFO L225 Difference]: With dead ends: 153 [2020-10-15 16:53:00,768 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 16:53:00,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1666, Invalid=4034, Unknown=0, NotChecked=0, Total=5700 [2020-10-15 16:53:00,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 16:53:00,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 105. [2020-10-15 16:53:00,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:53:00,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 16:53:00,770 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 33 [2020-10-15 16:53:00,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:00,770 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 16:53:00,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:53:00,771 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 16:53:00,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:53:00,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:00,771 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:00,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2020-10-15 16:53:00,972 INFO L429 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:00,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:00,972 INFO L82 PathProgramCache]: Analyzing trace with hash -982117628, now seen corresponding path program 356 times [2020-10-15 16:53:00,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:00,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493544676] [2020-10-15 16:53:00,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:01,902 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:01,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493544676] [2020-10-15 16:53:01,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878820949] [2020-10-15 16:53:01,902 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 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:01,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:53:01,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:53:01,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:53:01,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:02,025 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:53:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:02,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:02,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:53:02,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053451303] [2020-10-15 16:53:02,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:53:02,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:02,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:53:02,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:53:02,069 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 30 states. [2020-10-15 16:53:06,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:06,153 INFO L93 Difference]: Finished difference Result 150 states and 359 transitions. [2020-10-15 16:53:06,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-15 16:53:06,155 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:53:06,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:06,156 INFO L225 Difference]: With dead ends: 150 [2020-10-15 16:53:06,156 INFO L226 Difference]: Without dead ends: 144 [2020-10-15 16:53:06,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1675, Invalid=4177, Unknown=0, NotChecked=0, Total=5852 [2020-10-15 16:53:06,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-15 16:53:06,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 104. [2020-10-15 16:53:06,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:53:06,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 16:53:06,159 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 33 [2020-10-15 16:53:06,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:06,159 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 16:53:06,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:53:06,159 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 16:53:06,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:53:06,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:06,159 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:06,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:06,360 INFO L429 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:06,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:06,360 INFO L82 PathProgramCache]: Analyzing trace with hash -511121918, now seen corresponding path program 357 times [2020-10-15 16:53:06,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:06,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836058475] [2020-10-15 16:53:06,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:06,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:07,389 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:07,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836058475] [2020-10-15 16:53:07,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523354285] [2020-10-15 16:53:07,389 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 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:07,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 16:53:07,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:53:07,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:53:07,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:07,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:07,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 16:53:07,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032535032] [2020-10-15 16:53:07,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:53:07,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:07,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:53:07,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:53:07,531 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 29 states. [2020-10-15 16:53:11,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:11,154 INFO L93 Difference]: Finished difference Result 151 states and 363 transitions. [2020-10-15 16:53:11,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-15 16:53:11,157 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 16:53:11,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:11,158 INFO L225 Difference]: With dead ends: 151 [2020-10-15 16:53:11,158 INFO L226 Difference]: Without dead ends: 145 [2020-10-15 16:53:11,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1824, Invalid=4182, Unknown=0, NotChecked=0, Total=6006 [2020-10-15 16:53:11,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-15 16:53:11,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 107. [2020-10-15 16:53:11,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-15 16:53:11,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 275 transitions. [2020-10-15 16:53:11,161 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 275 transitions. Word has length 33 [2020-10-15 16:53:11,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:11,161 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 275 transitions. [2020-10-15 16:53:11,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:53:11,162 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 275 transitions. [2020-10-15 16:53:11,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:53:11,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:11,162 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:11,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2020-10-15 16:53:11,363 INFO L429 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:11,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:11,363 INFO L82 PathProgramCache]: Analyzing trace with hash -495034778, now seen corresponding path program 358 times [2020-10-15 16:53:11,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:11,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517340412] [2020-10-15 16:53:11,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:12,240 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:12,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517340412] [2020-10-15 16:53:12,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455654470] [2020-10-15 16:53:12,241 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 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:12,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:53:12,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:53:12,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:53:12,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:12,358 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:53:12,403 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:12,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:12,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:53:12,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344836843] [2020-10-15 16:53:12,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:53:12,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:12,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:53:12,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:53:12,404 INFO L87 Difference]: Start difference. First operand 107 states and 275 transitions. Second operand 30 states. [2020-10-15 16:53:16,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:16,488 INFO L93 Difference]: Finished difference Result 148 states and 357 transitions. [2020-10-15 16:53:16,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-15 16:53:16,490 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:53:16,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:16,491 INFO L225 Difference]: With dead ends: 148 [2020-10-15 16:53:16,491 INFO L226 Difference]: Without dead ends: 142 [2020-10-15 16:53:16,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1834, Invalid=4328, Unknown=0, NotChecked=0, Total=6162 [2020-10-15 16:53:16,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-15 16:53:16,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 106. [2020-10-15 16:53:16,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-15 16:53:16,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 273 transitions. [2020-10-15 16:53:16,494 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 273 transitions. Word has length 33 [2020-10-15 16:53:16,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:16,494 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 273 transitions. [2020-10-15 16:53:16,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:53:16,494 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 273 transitions. [2020-10-15 16:53:16,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:53:16,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:16,494 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:16,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:16,695 INFO L429 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:16,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:16,695 INFO L82 PathProgramCache]: Analyzing trace with hash -494544668, now seen corresponding path program 359 times [2020-10-15 16:53:16,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:16,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573464504] [2020-10-15 16:53:16,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:16,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:17,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573464504] [2020-10-15 16:53:17,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847134501] [2020-10-15 16:53:17,596 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 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:17,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 16:53:17,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:53:17,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:53:17,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:17,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:17,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 16:53:17,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842538836] [2020-10-15 16:53:17,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:53:17,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:17,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:53:17,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:53:17,731 INFO L87 Difference]: Start difference. First operand 106 states and 273 transitions. Second operand 29 states. [2020-10-15 16:53:21,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:21,205 INFO L93 Difference]: Finished difference Result 168 states and 407 transitions. [2020-10-15 16:53:21,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-15 16:53:21,208 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 16:53:21,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:21,208 INFO L225 Difference]: With dead ends: 168 [2020-10-15 16:53:21,208 INFO L226 Difference]: Without dead ends: 162 [2020-10-15 16:53:21,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1998, Invalid=4322, Unknown=0, NotChecked=0, Total=6320 [2020-10-15 16:53:21,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-15 16:53:21,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 112. [2020-10-15 16:53:21,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-15 16:53:21,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 293 transitions. [2020-10-15 16:53:21,212 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 293 transitions. Word has length 33 [2020-10-15 16:53:21,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:21,212 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 293 transitions. [2020-10-15 16:53:21,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:53:21,212 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 293 transitions. [2020-10-15 16:53:21,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:53:21,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:21,212 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:21,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:21,413 INFO L429 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:21,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:21,413 INFO L82 PathProgramCache]: Analyzing trace with hash -494527928, now seen corresponding path program 360 times [2020-10-15 16:53:21,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:21,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536469211] [2020-10-15 16:53:21,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:21,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:22,239 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:22,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536469211] [2020-10-15 16:53:22,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307607177] [2020-10-15 16:53:22,239 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 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:22,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 16:53:22,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:53:22,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:53:22,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:22,361 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:53:22,406 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:22,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:22,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:53:22,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034513896] [2020-10-15 16:53:22,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:53:22,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:22,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:53:22,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:53:22,407 INFO L87 Difference]: Start difference. First operand 112 states and 293 transitions. Second operand 30 states. [2020-10-15 16:53:26,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:26,521 INFO L93 Difference]: Finished difference Result 149 states and 363 transitions. [2020-10-15 16:53:26,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-15 16:53:26,525 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:53:26,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:26,525 INFO L225 Difference]: With dead ends: 149 [2020-10-15 16:53:26,525 INFO L226 Difference]: Without dead ends: 141 [2020-10-15 16:53:26,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2009, Invalid=4471, Unknown=0, NotChecked=0, Total=6480 [2020-10-15 16:53:26,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-15 16:53:26,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 109. [2020-10-15 16:53:26,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-15 16:53:26,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 281 transitions. [2020-10-15 16:53:26,528 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 281 transitions. Word has length 33 [2020-10-15 16:53:26,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:26,528 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 281 transitions. [2020-10-15 16:53:26,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:53:26,528 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 281 transitions. [2020-10-15 16:53:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:53:26,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:26,529 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:26,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:26,729 INFO L429 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:26,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:26,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1551441143, now seen corresponding path program 361 times [2020-10-15 16:53:26,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:26,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519125935] [2020-10-15 16:53:26,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:27,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519125935] [2020-10-15 16:53:27,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612885477] [2020-10-15 16:53:27,960 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 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:28,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:53:28,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:28,034 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:28,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:28,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 16:53:28,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128475524] [2020-10-15 16:53:28,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:53:28,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:28,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:53:28,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:53:28,035 INFO L87 Difference]: Start difference. First operand 109 states and 281 transitions. Second operand 30 states. [2020-10-15 16:53:30,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:30,082 INFO L93 Difference]: Finished difference Result 174 states and 411 transitions. [2020-10-15 16:53:30,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:53:30,085 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 16:53:30,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:30,086 INFO L225 Difference]: With dead ends: 174 [2020-10-15 16:53:30,086 INFO L226 Difference]: Without dead ends: 168 [2020-10-15 16:53:30,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=975, Invalid=2217, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 16:53:30,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-15 16:53:30,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 111. [2020-10-15 16:53:30,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 16:53:30,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 16:53:30,089 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 16:53:30,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:30,089 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 16:53:30,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:53:30,089 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 16:53:30,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:53:30,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:30,089 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:30,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable362 [2020-10-15 16:53:30,290 INFO L429 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:30,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:30,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1122267739, now seen corresponding path program 362 times [2020-10-15 16:53:30,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:30,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217436841] [2020-10-15 16:53:30,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:31,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217436841] [2020-10-15 16:53:31,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145492609] [2020-10-15 16:53:31,512 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 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:31,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:53:31,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:53:31,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:53:31,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:31,630 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:53:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:31,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:31,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 16:53:31,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662144140] [2020-10-15 16:53:31,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:53:31,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:31,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:53:31,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:53:31,653 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 16:53:33,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:33,760 INFO L93 Difference]: Finished difference Result 171 states and 405 transitions. [2020-10-15 16:53:33,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:53:33,762 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 16:53:33,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:33,763 INFO L225 Difference]: With dead ends: 171 [2020-10-15 16:53:33,763 INFO L226 Difference]: Without dead ends: 165 [2020-10-15 16:53:33,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1034, Invalid=2506, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:53:33,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-15 16:53:33,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 110. [2020-10-15 16:53:33,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:53:33,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 16:53:33,766 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 16:53:33,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:33,766 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 16:53:33,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:53:33,766 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 16:53:33,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:53:33,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:33,767 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:33,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:33,967 INFO L429 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:33,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:33,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1692542375, now seen corresponding path program 363 times [2020-10-15 16:53:33,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:33,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98909922] [2020-10-15 16:53:33,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:35,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98909922] [2020-10-15 16:53:35,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441513589] [2020-10-15 16:53:35,209 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 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:35,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 16:53:35,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:53:35,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:53:35,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:35,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:35,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 16:53:35,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985285710] [2020-10-15 16:53:35,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:53:35,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:35,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:53:35,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:53:35,296 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 16:53:37,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:37,526 INFO L93 Difference]: Finished difference Result 168 states and 399 transitions. [2020-10-15 16:53:37,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:53:37,529 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 16:53:37,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:37,530 INFO L225 Difference]: With dead ends: 168 [2020-10-15 16:53:37,530 INFO L226 Difference]: Without dead ends: 162 [2020-10-15 16:53:37,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 16:53:37,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-15 16:53:37,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 111. [2020-10-15 16:53:37,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 16:53:37,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 16:53:37,533 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 16:53:37,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:37,533 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 16:53:37,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:53:37,533 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 16:53:37,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:53:37,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:37,534 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:37,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2020-10-15 16:53:37,735 INFO L429 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:37,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:37,735 INFO L82 PathProgramCache]: Analyzing trace with hash 778516669, now seen corresponding path program 364 times [2020-10-15 16:53:37,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:37,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056168520] [2020-10-15 16:53:37,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:38,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056168520] [2020-10-15 16:53:38,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181587027] [2020-10-15 16:53:38,951 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 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:39,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:53:39,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:53:39,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:53:39,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:39,073 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:53:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:39,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:39,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 16:53:39,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94543215] [2020-10-15 16:53:39,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:53:39,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:39,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:53:39,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:53:39,098 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 16:53:41,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:41,570 INFO L93 Difference]: Finished difference Result 167 states and 397 transitions. [2020-10-15 16:53:41,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:53:41,573 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 16:53:41,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:41,574 INFO L225 Difference]: With dead ends: 167 [2020-10-15 16:53:41,574 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 16:53:41,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1040, Invalid=2742, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 16:53:41,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 16:53:41,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 110. [2020-10-15 16:53:41,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:53:41,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 16:53:41,576 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 16:53:41,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:41,577 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 16:53:41,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:53:41,577 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 16:53:41,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:53:41,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:41,577 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:41,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:41,778 INFO L429 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:41,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:41,778 INFO L82 PathProgramCache]: Analyzing trace with hash -46757829, now seen corresponding path program 365 times [2020-10-15 16:53:41,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:41,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679808444] [2020-10-15 16:53:41,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:42,971 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:42,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679808444] [2020-10-15 16:53:42,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603082726] [2020-10-15 16:53:42,972 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 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:43,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 16:53:43,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:53:43,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:53:43,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:43,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:43,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 16:53:43,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495868052] [2020-10-15 16:53:43,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:53:43,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:43,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:53:43,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:53:43,075 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 16:53:45,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:45,605 INFO L93 Difference]: Finished difference Result 164 states and 391 transitions. [2020-10-15 16:53:45,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:53:45,608 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 16:53:45,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:45,608 INFO L225 Difference]: With dead ends: 164 [2020-10-15 16:53:45,608 INFO L226 Difference]: Without dead ends: 158 [2020-10-15 16:53:45,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=989, Invalid=2671, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 16:53:45,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-15 16:53:45,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 111. [2020-10-15 16:53:45,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 16:53:45,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 16:53:45,611 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 16:53:45,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:45,611 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 16:53:45,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:53:45,611 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 16:53:45,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:53:45,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:45,612 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:45,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2020-10-15 16:53:45,812 INFO L429 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:45,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:45,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1085526113, now seen corresponding path program 366 times [2020-10-15 16:53:45,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:45,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124228759] [2020-10-15 16:53:45,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:47,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124228759] [2020-10-15 16:53:47,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779959510] [2020-10-15 16:53:47,112 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 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:47,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 16:53:47,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:53:47,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:53:47,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:47,249 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:53:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:47,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:47,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 16:53:47,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897170353] [2020-10-15 16:53:47,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:53:47,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:47,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:53:47,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:53:47,289 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 16:53:50,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:50,013 INFO L93 Difference]: Finished difference Result 163 states and 389 transitions. [2020-10-15 16:53:50,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:53:50,017 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 16:53:50,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:50,017 INFO L225 Difference]: With dead ends: 163 [2020-10-15 16:53:50,017 INFO L226 Difference]: Without dead ends: 157 [2020-10-15 16:53:50,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1062, Invalid=2970, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 16:53:50,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-15 16:53:50,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2020-10-15 16:53:50,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:53:50,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 16:53:50,020 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 16:53:50,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:50,021 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 16:53:50,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:53:50,021 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 16:53:50,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:53:50,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:50,021 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:50,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2020-10-15 16:53:50,222 INFO L429 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:50,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:50,222 INFO L82 PathProgramCache]: Analyzing trace with hash -670742883, now seen corresponding path program 367 times [2020-10-15 16:53:50,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:50,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068185708] [2020-10-15 16:53:50,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:51,274 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:51,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068185708] [2020-10-15 16:53:51,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288287009] [2020-10-15 16:53:51,274 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 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:51,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:53:51,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:51,364 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:51,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:51,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 16:53:51,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836556796] [2020-10-15 16:53:51,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:53:51,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:51,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:53:51,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:53:51,365 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 16:53:53,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:53,862 INFO L93 Difference]: Finished difference Result 160 states and 383 transitions. [2020-10-15 16:53:53,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:53:53,866 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 16:53:53,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:53,866 INFO L225 Difference]: With dead ends: 160 [2020-10-15 16:53:53,866 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 16:53:53,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1020, Invalid=2886, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 16:53:53,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 16:53:53,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 111. [2020-10-15 16:53:53,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 16:53:53,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 16:53:53,869 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 16:53:53,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:53,869 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 16:53:53,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:53:53,870 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 16:53:53,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:53:53,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:53,870 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:54,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:54,071 INFO L429 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:54,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:54,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1902475009, now seen corresponding path program 368 times [2020-10-15 16:53:54,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:54,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676433024] [2020-10-15 16:53:54,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:55,216 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:55,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676433024] [2020-10-15 16:53:55,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338103808] [2020-10-15 16:53:55,217 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 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:55,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:53:55,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:53:55,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:53:55,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:55,339 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:53:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:55,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:55,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 16:53:55,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516086220] [2020-10-15 16:53:55,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:53:55,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:55,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:53:55,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:53:55,375 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 16:53:58,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:58,246 INFO L93 Difference]: Finished difference Result 159 states and 381 transitions. [2020-10-15 16:53:58,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:53:58,250 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 16:53:58,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:58,251 INFO L225 Difference]: With dead ends: 159 [2020-10-15 16:53:58,251 INFO L226 Difference]: Without dead ends: 153 [2020-10-15 16:53:58,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1100, Invalid=3190, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 16:53:58,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-15 16:53:58,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 110. [2020-10-15 16:53:58,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:53:58,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 16:53:58,253 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 16:53:58,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:58,253 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 16:53:58,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:53:58,254 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 16:53:58,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:53:58,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:58,254 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:58,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2020-10-15 16:53:58,455 INFO L429 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:58,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:58,455 INFO L82 PathProgramCache]: Analyzing trace with hash 718550399, now seen corresponding path program 369 times [2020-10-15 16:53:58,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:58,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313233274] [2020-10-15 16:53:58,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:59,487 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:59,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313233274] [2020-10-15 16:53:59,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965310235] [2020-10-15 16:53:59,488 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 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:59,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 16:53:59,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:53:59,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:53:59,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:59,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:59,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 16:53:59,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269955418] [2020-10-15 16:53:59,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:53:59,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:59,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:53:59,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:53:59,595 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 16:54:02,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:54:02,231 INFO L93 Difference]: Finished difference Result 156 states and 375 transitions. [2020-10-15 16:54:02,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:54:02,233 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 16:54:02,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:54:02,234 INFO L225 Difference]: With dead ends: 156 [2020-10-15 16:54:02,234 INFO L226 Difference]: Without dead ends: 150 [2020-10-15 16:54:02,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1067, Invalid=3093, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 16:54:02,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-15 16:54:02,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 111. [2020-10-15 16:54:02,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 16:54:02,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 16:54:02,237 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 16:54:02,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:54:02,237 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 16:54:02,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:54:02,237 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 16:54:02,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:54:02,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:54:02,237 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:54:02,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:02,438 INFO L429 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:54:02,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:54:02,438 INFO L82 PathProgramCache]: Analyzing trace with hash -829608221, now seen corresponding path program 370 times [2020-10-15 16:54:02,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:54:02,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799619378] [2020-10-15 16:54:02,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:54:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:03,556 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:03,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799619378] [2020-10-15 16:54:03,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408392953] [2020-10-15 16:54:03,556 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 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:03,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:54:03,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:54:03,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:54:03,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:54:03,679 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:54:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:03,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:54:03,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 16:54:03,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868753867] [2020-10-15 16:54:03,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:54:03,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:54:03,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:54:03,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:54:03,711 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 16:54:06,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:54:06,741 INFO L93 Difference]: Finished difference Result 155 states and 373 transitions. [2020-10-15 16:54:06,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 16:54:06,744 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 16:54:06,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:54:06,744 INFO L225 Difference]: With dead ends: 155 [2020-10-15 16:54:06,744 INFO L226 Difference]: Without dead ends: 149 [2020-10-15 16:54:06,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1154, Invalid=3402, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 16:54:06,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-15 16:54:06,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 110. [2020-10-15 16:54:06,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:54:06,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 16:54:06,752 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 16:54:06,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:54:06,752 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 16:54:06,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:54:06,752 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 16:54:06,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:54:06,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:54:06,752 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:54:06,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:06,953 INFO L429 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:54:06,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:54:06,954 INFO L82 PathProgramCache]: Analyzing trace with hash -2131397407, now seen corresponding path program 371 times [2020-10-15 16:54:06,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:54:06,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861477020] [2020-10-15 16:54:06,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:54:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:07,964 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:07,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861477020] [2020-10-15 16:54:07,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158683313] [2020-10-15 16:54:07,965 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 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:08,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 16:54:08,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:54:08,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:54:08,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:54:08,067 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:08,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:54:08,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 16:54:08,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900980876] [2020-10-15 16:54:08,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:54:08,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:54:08,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:54:08,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:54:08,068 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 16:54:11,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:54:11,052 INFO L93 Difference]: Finished difference Result 152 states and 367 transitions. [2020-10-15 16:54:11,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 16:54:11,055 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 16:54:11,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:54:11,055 INFO L225 Difference]: With dead ends: 152 [2020-10-15 16:54:11,055 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 16:54:11,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1130, Invalid=3292, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 16:54:11,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 16:54:11,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 111. [2020-10-15 16:54:11,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 16:54:11,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 16:54:11,058 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 16:54:11,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:54:11,059 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 16:54:11,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:54:11,059 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 16:54:11,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:54:11,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:54:11,059 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:54:11,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:11,260 INFO L429 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:54:11,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:54:11,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1353021253, now seen corresponding path program 372 times [2020-10-15 16:54:11,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:54:11,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719884429] [2020-10-15 16:54:11,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:54:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:12,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719884429] [2020-10-15 16:54:12,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281083326] [2020-10-15 16:54:12,383 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 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:12,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 16:54:12,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:54:12,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:54:12,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:54:12,510 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:54:12,543 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:12,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:54:12,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 16:54:12,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920948887] [2020-10-15 16:54:12,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:54:12,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:54:12,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:54:12,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:54:12,544 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 16:54:16,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:54:16,163 INFO L93 Difference]: Finished difference Result 151 states and 365 transitions. [2020-10-15 16:54:16,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 16:54:16,166 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 16:54:16,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:54:16,166 INFO L225 Difference]: With dead ends: 151 [2020-10-15 16:54:16,167 INFO L226 Difference]: Without dead ends: 145 [2020-10-15 16:54:16,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1224, Invalid=3606, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 16:54:16,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-15 16:54:16,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 110. [2020-10-15 16:54:16,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:54:16,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 16:54:16,169 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 16:54:16,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:54:16,170 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 16:54:16,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:54:16,170 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 16:54:16,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:54:16,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:54:16,170 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:54:16,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:16,371 INFO L429 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:54:16,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:54:16,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1405297859, now seen corresponding path program 373 times [2020-10-15 16:54:16,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:54:16,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385124584] [2020-10-15 16:54:16,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:54:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:17,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385124584] [2020-10-15 16:54:17,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518359745] [2020-10-15 16:54:17,410 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 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:17,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:54:17,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:54:17,506 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:17,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:54:17,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 16:54:17,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137294960] [2020-10-15 16:54:17,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:54:17,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:54:17,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:54:17,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:54:17,507 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 16:54:20,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:54:20,513 INFO L93 Difference]: Finished difference Result 148 states and 359 transitions. [2020-10-15 16:54:20,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 16:54:20,516 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 16:54:20,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:54:20,516 INFO L225 Difference]: With dead ends: 148 [2020-10-15 16:54:20,516 INFO L226 Difference]: Without dead ends: 142 [2020-10-15 16:54:20,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1209, Invalid=3483, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 16:54:20,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-15 16:54:20,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 111. [2020-10-15 16:54:20,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 16:54:20,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 16:54:20,520 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 16:54:20,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:54:20,520 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 16:54:20,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:54:20,520 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 16:54:20,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:54:20,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:54:20,520 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:54:20,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2020-10-15 16:54:20,721 INFO L429 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:54:20,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:54:20,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1013419993, now seen corresponding path program 374 times [2020-10-15 16:54:20,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:54:20,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575083279] [2020-10-15 16:54:20,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:54:20,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:21,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575083279] [2020-10-15 16:54:21,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450311101] [2020-10-15 16:54:21,875 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 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:21,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:54:21,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:54:21,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:54:21,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:54:22,011 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:54:22,049 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:22,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:54:22,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 16:54:22,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431776287] [2020-10-15 16:54:22,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:54:22,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:54:22,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:54:22,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:54:22,050 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 16:54:25,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:54:25,836 INFO L93 Difference]: Finished difference Result 147 states and 357 transitions. [2020-10-15 16:54:25,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 16:54:25,840 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 16:54:25,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:54:25,841 INFO L225 Difference]: With dead ends: 147 [2020-10-15 16:54:25,841 INFO L226 Difference]: Without dead ends: 141 [2020-10-15 16:54:25,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1310, Invalid=3802, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 16:54:25,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-15 16:54:25,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 110. [2020-10-15 16:54:25,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:54:25,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 16:54:25,843 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 16:54:25,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:54:25,843 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 16:54:25,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:54:25,844 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 16:54:25,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:54:25,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:54:25,844 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:54:26,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2020-10-15 16:54:26,045 INFO L429 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:54:26,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:54:26,045 INFO L82 PathProgramCache]: Analyzing trace with hash -325098203, now seen corresponding path program 375 times [2020-10-15 16:54:26,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:54:26,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907805350] [2020-10-15 16:54:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:54:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:27,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907805350] [2020-10-15 16:54:27,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013896197] [2020-10-15 16:54:27,160 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 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:27,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 16:54:27,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:54:27,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:54:27,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:54:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:27,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:54:27,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 16:54:27,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406304320] [2020-10-15 16:54:27,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:54:27,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:54:27,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:54:27,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:54:27,278 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 16:54:30,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:54:30,819 INFO L93 Difference]: Finished difference Result 144 states and 351 transitions. [2020-10-15 16:54:30,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 16:54:30,823 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 16:54:30,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:54:30,824 INFO L225 Difference]: With dead ends: 144 [2020-10-15 16:54:30,824 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 16:54:30,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1304, Invalid=3666, Unknown=0, NotChecked=0, Total=4970 [2020-10-15 16:54:30,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 16:54:30,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 111. [2020-10-15 16:54:30,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 16:54:30,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 16:54:30,827 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 16:54:30,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:54:30,828 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 16:54:30,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:54:30,828 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 16:54:30,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:54:30,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:54:30,829 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:54:31,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2020-10-15 16:54:31,038 INFO L429 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:54:31,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:54:31,039 INFO L82 PathProgramCache]: Analyzing trace with hash 660093321, now seen corresponding path program 376 times [2020-10-15 16:54:31,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:54:31,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948333775] [2020-10-15 16:54:31,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:54:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:32,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948333775] [2020-10-15 16:54:32,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523204731] [2020-10-15 16:54:32,120 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 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:32,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:54:32,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:54:32,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:54:32,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:54:32,251 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:54:32,296 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:32,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:54:32,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 16:54:32,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544566791] [2020-10-15 16:54:32,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:54:32,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:54:32,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:54:32,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:54:32,297 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 16:54:36,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:54:36,291 INFO L93 Difference]: Finished difference Result 143 states and 349 transitions. [2020-10-15 16:54:36,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 16:54:36,294 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 16:54:36,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:54:36,294 INFO L225 Difference]: With dead ends: 143 [2020-10-15 16:54:36,294 INFO L226 Difference]: Without dead ends: 137 [2020-10-15 16:54:36,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1412, Invalid=3990, Unknown=0, NotChecked=0, Total=5402 [2020-10-15 16:54:36,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-15 16:54:36,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 110. [2020-10-15 16:54:36,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:54:36,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 16:54:36,296 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 16:54:36,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:54:36,297 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 16:54:36,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:54:36,297 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 16:54:36,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:54:36,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:54:36,297 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:54:36,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2020-10-15 16:54:36,498 INFO L429 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:54:36,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:54:36,499 INFO L82 PathProgramCache]: Analyzing trace with hash -957065721, now seen corresponding path program 377 times [2020-10-15 16:54:36,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:54:36,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535905069] [2020-10-15 16:54:36,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:54:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:37,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535905069] [2020-10-15 16:54:37,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273105897] [2020-10-15 16:54:37,565 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 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:37,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 16:54:37,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:54:37,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:54:37,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:54:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:37,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:54:37,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 16:54:37,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667547327] [2020-10-15 16:54:37,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:54:37,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:54:37,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:54:37,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:54:37,693 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 16:54:41,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:54:41,225 INFO L93 Difference]: Finished difference Result 140 states and 343 transitions. [2020-10-15 16:54:41,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 16:54:41,227 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 16:54:41,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:54:41,228 INFO L225 Difference]: With dead ends: 140 [2020-10-15 16:54:41,228 INFO L226 Difference]: Without dead ends: 134 [2020-10-15 16:54:41,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1415, Invalid=3841, Unknown=0, NotChecked=0, Total=5256 [2020-10-15 16:54:41,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-15 16:54:41,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 111. [2020-10-15 16:54:41,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 16:54:41,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 16:54:41,231 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 16:54:41,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:54:41,231 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 16:54:41,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:54:41,231 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 16:54:41,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:54:41,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:54:41,231 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:54:41,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2020-10-15 16:54:41,432 INFO L429 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:54:41,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:54:41,432 INFO L82 PathProgramCache]: Analyzing trace with hash 299823979, now seen corresponding path program 378 times [2020-10-15 16:54:41,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:54:41,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160686176] [2020-10-15 16:54:41,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:54:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:42,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160686176] [2020-10-15 16:54:42,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685968552] [2020-10-15 16:54:42,482 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 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:42,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 16:54:42,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:54:42,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:54:42,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:54:42,623 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:54:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:42,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:54:42,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 16:54:42,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903869982] [2020-10-15 16:54:42,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:54:42,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:54:42,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:54:42,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:54:42,669 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 16:54:47,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:54:47,201 INFO L93 Difference]: Finished difference Result 139 states and 341 transitions. [2020-10-15 16:54:47,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 16:54:47,204 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 16:54:47,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:54:47,204 INFO L225 Difference]: With dead ends: 139 [2020-10-15 16:54:47,204 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 16:54:47,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1530, Invalid=4170, Unknown=0, NotChecked=0, Total=5700 [2020-10-15 16:54:47,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 16:54:47,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 110. [2020-10-15 16:54:47,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:54:47,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 16:54:47,207 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 16:54:47,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:54:47,207 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 16:54:47,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:54:47,207 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 16:54:47,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:54:47,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:54:47,207 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:54:47,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2020-10-15 16:54:47,408 INFO L429 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:54:47,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:54:47,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1916016489, now seen corresponding path program 379 times [2020-10-15 16:54:47,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:54:47,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807912224] [2020-10-15 16:54:47,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:54:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:48,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807912224] [2020-10-15 16:54:48,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204843786] [2020-10-15 16:54:48,370 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 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:48,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:48,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:54:48,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:54:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:48,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:54:48,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 16:54:48,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773784127] [2020-10-15 16:54:48,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:54:48,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:54:48,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:54:48,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:54:48,483 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 16:54:52,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:54:52,417 INFO L93 Difference]: Finished difference Result 136 states and 335 transitions. [2020-10-15 16:54:52,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-15 16:54:52,420 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 16:54:52,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:54:52,420 INFO L225 Difference]: With dead ends: 136 [2020-10-15 16:54:52,421 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 16:54:52,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1542, Invalid=4008, Unknown=0, NotChecked=0, Total=5550 [2020-10-15 16:54:52,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 16:54:52,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 111. [2020-10-15 16:54:52,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 16:54:52,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 16:54:52,423 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 16:54:52,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:54:52,423 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 16:54:52,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:54:52,423 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 16:54:52,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:54:52,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:54:52,424 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:54:52,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:52,624 INFO L429 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:54:52,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:54:52,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1859207731, now seen corresponding path program 380 times [2020-10-15 16:54:52,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:54:52,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698628630] [2020-10-15 16:54:52,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:54:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:53,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698628630] [2020-10-15 16:54:53,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081691293] [2020-10-15 16:54:53,685 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 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:53,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:54:53,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:54:53,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:54:53,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:54:53,821 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:54:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:53,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:54:53,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 16:54:53,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625013813] [2020-10-15 16:54:53,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:54:53,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:54:53,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:54:53,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:54:53,868 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 16:54:58,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:54:58,687 INFO L93 Difference]: Finished difference Result 135 states and 333 transitions. [2020-10-15 16:54:58,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-15 16:54:58,690 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 16:54:58,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:54:58,691 INFO L225 Difference]: With dead ends: 135 [2020-10-15 16:54:58,691 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 16:54:58,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1664, Invalid=4342, Unknown=0, NotChecked=0, Total=6006 [2020-10-15 16:54:58,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 16:54:58,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-15 16:54:58,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:54:58,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 16:54:58,693 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 16:54:58,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:54:58,693 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 16:54:58,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:54:58,694 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 16:54:58,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:54:58,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:54:58,694 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:54:58,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:58,895 INFO L429 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:54:58,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:54:58,895 INFO L82 PathProgramCache]: Analyzing trace with hash -203896501, now seen corresponding path program 381 times [2020-10-15 16:54:58,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:54:58,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166862349] [2020-10-15 16:54:58,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:54:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:59,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166862349] [2020-10-15 16:54:59,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952270634] [2020-10-15 16:54:59,888 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 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:59,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 16:54:59,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:54:59,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:54:59,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:55:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:00,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:55:00,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 16:55:00,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295456891] [2020-10-15 16:55:00,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:55:00,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:55:00,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:55:00,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:55:00,017 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 16:55:04,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:55:04,205 INFO L93 Difference]: Finished difference Result 132 states and 327 transitions. [2020-10-15 16:55:04,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 16:55:04,208 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 16:55:04,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:55:04,208 INFO L225 Difference]: With dead ends: 132 [2020-10-15 16:55:04,208 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 16:55:04,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1685, Invalid=4167, Unknown=0, NotChecked=0, Total=5852 [2020-10-15 16:55:04,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 16:55:04,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 111. [2020-10-15 16:55:04,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 16:55:04,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 16:55:04,211 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 16:55:04,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:55:04,211 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 16:55:04,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:55:04,213 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 16:55:04,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:55:04,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:55:04,213 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:55:04,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:04,419 INFO L429 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:55:04,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:55:04,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1924024145, now seen corresponding path program 382 times [2020-10-15 16:55:04,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:55:04,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574713716] [2020-10-15 16:55:04,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:55:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:55:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:05,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574713716] [2020-10-15 16:55:05,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714161673] [2020-10-15 16:55:05,513 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 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:05,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:55:05,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:55:05,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:55:05,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:55:05,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:55:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:05,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:55:05,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 16:55:05,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355792793] [2020-10-15 16:55:05,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:55:05,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:55:05,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:55:05,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:55:05,694 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 16:55:10,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:55:10,899 INFO L93 Difference]: Finished difference Result 131 states and 325 transitions. [2020-10-15 16:55:10,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-15 16:55:10,902 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 16:55:10,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:55:10,903 INFO L225 Difference]: With dead ends: 131 [2020-10-15 16:55:10,903 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 16:55:10,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1814, Invalid=4506, Unknown=0, NotChecked=0, Total=6320 [2020-10-15 16:55:10,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 16:55:10,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2020-10-15 16:55:10,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:55:10,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 16:55:10,907 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 16:55:10,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:55:10,907 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 16:55:10,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:55:10,907 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 16:55:10,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:55:10,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:55:10,908 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:55:11,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:11,111 INFO L429 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:55:11,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:55:11,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1453028435, now seen corresponding path program 383 times [2020-10-15 16:55:11,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:55:11,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079960012] [2020-10-15 16:55:11,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:55:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:55:12,252 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:12,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079960012] [2020-10-15 16:55:12,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627928127] [2020-10-15 16:55:12,253 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 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:12,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 16:55:12,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:55:12,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:55:12,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:55:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:12,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:55:12,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 16:55:12,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300890342] [2020-10-15 16:55:12,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:55:12,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:55:12,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:55:12,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:55:12,406 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 16:55:16,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:55:16,509 INFO L93 Difference]: Finished difference Result 128 states and 319 transitions. [2020-10-15 16:55:16,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-15 16:55:16,512 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 16:55:16,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:55:16,513 INFO L225 Difference]: With dead ends: 128 [2020-10-15 16:55:16,513 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 16:55:16,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1844, Invalid=4318, Unknown=0, NotChecked=0, Total=6162 [2020-10-15 16:55:16,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 16:55:16,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 111. [2020-10-15 16:55:16,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 16:55:16,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 16:55:16,516 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 16:55:16,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:55:16,516 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 16:55:16,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:55:16,516 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 16:55:16,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:55:16,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:55:16,517 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:55:16,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:16,717 INFO L429 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:55:16,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:55:16,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1436941295, now seen corresponding path program 384 times [2020-10-15 16:55:16,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:55:16,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105586127] [2020-10-15 16:55:16,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:55:16,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:55:17,708 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:17,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105586127] [2020-10-15 16:55:17,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555251461] [2020-10-15 16:55:17,709 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 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:17,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 16:55:17,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:55:17,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:55:17,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:55:17,847 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:55:17,902 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:17,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:55:17,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 16:55:17,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56051279] [2020-10-15 16:55:17,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:55:17,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:55:17,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:55:17,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=735, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:55:17,904 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 16:55:22,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:55:22,870 INFO L93 Difference]: Finished difference Result 127 states and 317 transitions. [2020-10-15 16:55:22,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-15 16:55:22,873 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 16:55:22,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:55:22,874 INFO L225 Difference]: With dead ends: 127 [2020-10-15 16:55:22,874 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 16:55:22,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1980, Invalid=4662, Unknown=0, NotChecked=0, Total=6642 [2020-10-15 16:55:22,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 16:55:22,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 110. [2020-10-15 16:55:22,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:55:22,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 16:55:22,877 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 16:55:22,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:55:22,877 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 16:55:22,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:55:22,877 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 16:55:22,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:55:22,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:55:22,877 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:55:23,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:23,078 INFO L429 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:55:23,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:55:23,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1436451185, now seen corresponding path program 385 times [2020-10-15 16:55:23,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:55:23,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992024064] [2020-10-15 16:55:23,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:55:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:55:24,065 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:24,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992024064] [2020-10-15 16:55:24,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739279936] [2020-10-15 16:55:24,066 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 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:24,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:55:24,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:55:24,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:55:24,188 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:24,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:55:24,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 16:55:24,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494683869] [2020-10-15 16:55:24,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:55:24,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:55:24,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:55:24,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:55:24,190 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 16:55:28,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:55:28,423 INFO L93 Difference]: Finished difference Result 143 states and 357 transitions. [2020-10-15 16:55:28,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-15 16:55:28,426 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 16:55:28,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:55:28,427 INFO L225 Difference]: With dead ends: 143 [2020-10-15 16:55:28,427 INFO L226 Difference]: Without dead ends: 137 [2020-10-15 16:55:28,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1767 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2019, Invalid=4461, Unknown=0, NotChecked=0, Total=6480 [2020-10-15 16:55:28,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-15 16:55:28,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 114. [2020-10-15 16:55:28,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-15 16:55:28,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 297 transitions. [2020-10-15 16:55:28,430 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 297 transitions. Word has length 34 [2020-10-15 16:55:28,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:55:28,430 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 297 transitions. [2020-10-15 16:55:28,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:55:28,430 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 297 transitions. [2020-10-15 16:55:28,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:55:28,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:55:28,430 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:55:28,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2020-10-15 16:55:28,631 INFO L429 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:55:28,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:55:28,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1436434445, now seen corresponding path program 386 times [2020-10-15 16:55:28,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:55:28,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014867128] [2020-10-15 16:55:28,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:55:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:55:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:29,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014867128] [2020-10-15 16:55:29,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584824857] [2020-10-15 16:55:29,705 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 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:29,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:55:29,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:55:29,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 16:55:29,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:55:29,926 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:29,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:55:29,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 16:55:29,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641539324] [2020-10-15 16:55:29,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:55:29,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:55:29,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:55:29,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:55:29,928 INFO L87 Difference]: Start difference. First operand 114 states and 297 transitions. Second operand 31 states. [2020-10-15 16:55:35,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:55:35,079 INFO L93 Difference]: Finished difference Result 122 states and 309 transitions. [2020-10-15 16:55:35,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-15 16:55:35,084 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 16:55:35,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:55:35,085 INFO L225 Difference]: With dead ends: 122 [2020-10-15 16:55:35,085 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 16:55:35,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1715 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1826, Invalid=4816, Unknown=0, NotChecked=0, Total=6642 [2020-10-15 16:55:35,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 16:55:35,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 81. [2020-10-15 16:55:35,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:55:35,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 198 transitions. [2020-10-15 16:55:35,087 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 198 transitions. Word has length 34 [2020-10-15 16:55:35,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:55:35,087 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 198 transitions. [2020-10-15 16:55:35,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:55:35,087 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 198 transitions. [2020-10-15 16:55:35,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:55:35,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:55:35,088 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:55:35,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2020-10-15 16:55:35,289 INFO L429 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:55:35,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:55:35,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1849519723, now seen corresponding path program 387 times [2020-10-15 16:55:35,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:55:35,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045524094] [2020-10-15 16:55:35,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:55:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:55:36,331 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:36,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045524094] [2020-10-15 16:55:36,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896335461] [2020-10-15 16:55:36,332 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 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:36,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 16:55:36,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:55:36,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:55:36,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:55:36,456 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:55:36,525 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:36,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:55:36,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 16:55:36,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135742047] [2020-10-15 16:55:36,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:55:36,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:55:36,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:55:36,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:55:36,527 INFO L87 Difference]: Start difference. First operand 81 states and 198 transitions. Second operand 31 states. [2020-10-15 16:55:41,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:55:41,906 INFO L93 Difference]: Finished difference Result 148 states and 363 transitions. [2020-10-15 16:55:41,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-15 16:55:41,909 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 16:55:41,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:55:41,910 INFO L225 Difference]: With dead ends: 148 [2020-10-15 16:55:41,910 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 16:55:41,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2233, Invalid=4739, Unknown=0, NotChecked=0, Total=6972 [2020-10-15 16:55:41,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 16:55:41,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 112. [2020-10-15 16:55:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-15 16:55:41,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 289 transitions. [2020-10-15 16:55:41,912 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 289 transitions. Word has length 34 [2020-10-15 16:55:41,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:55:41,913 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 289 transitions. [2020-10-15 16:55:41,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:55:41,913 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 289 transitions. [2020-10-15 16:55:41,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 16:55:41,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:55:41,913 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:55:42,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable388,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:42,118 INFO L429 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:55:42,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:55:42,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1579778528, now seen corresponding path program 388 times [2020-10-15 16:55:42,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:55:42,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650354426] [2020-10-15 16:55:42,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:55:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:55:43,207 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:43,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650354426] [2020-10-15 16:55:43,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054680506] [2020-10-15 16:55:43,207 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 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:43,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:55:43,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:55:43,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 16:55:43,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:55:43,324 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:55:43,408 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:43,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:55:43,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-15 16:55:43,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661121489] [2020-10-15 16:55:43,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 16:55:43,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:55:43,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 16:55:43,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:55:43,410 INFO L87 Difference]: Start difference. First operand 112 states and 289 transitions. Second operand 32 states. [2020-10-15 16:55:49,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:55:49,034 INFO L93 Difference]: Finished difference Result 120 states and 309 transitions. [2020-10-15 16:55:49,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-15 16:55:49,040 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-15 16:55:49,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:55:49,041 INFO L225 Difference]: With dead ends: 120 [2020-10-15 16:55:49,041 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 16:55:49,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2255, Invalid=4885, Unknown=0, NotChecked=0, Total=7140 [2020-10-15 16:55:49,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 16:55:49,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 82. [2020-10-15 16:55:49,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:55:49,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 202 transitions. [2020-10-15 16:55:49,043 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 202 transitions. Word has length 35 [2020-10-15 16:55:49,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:55:49,044 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 202 transitions. [2020-10-15 16:55:49,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 16:55:49,044 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 202 transitions. [2020-10-15 16:55:49,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 16:55:49,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:55:49,044 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:55:49,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2020-10-15 16:55:49,245 INFO L429 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:55:49,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:55:49,245 INFO L82 PathProgramCache]: Analyzing trace with hash -484633973, now seen corresponding path program 389 times [2020-10-15 16:55:49,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:55:49,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346877907] [2020-10-15 16:55:49,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:55:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:55:50,993 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:50,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346877907] [2020-10-15 16:55:50,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615092707] [2020-10-15 16:55:50,994 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 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:51,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-10-15 16:55:51,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:55:51,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 16:55:51,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:55:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:51,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:55:51,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-15 16:55:51,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219983518] [2020-10-15 16:55:51,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:55:51,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:55:51,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:55:51,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:55:51,079 INFO L87 Difference]: Start difference. First operand 82 states and 202 transitions. Second operand 31 states. [2020-10-15 16:55:53,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:55:53,461 INFO L93 Difference]: Finished difference Result 126 states and 293 transitions. [2020-10-15 16:55:53,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:55:53,465 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-15 16:55:53,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:55:53,466 INFO L225 Difference]: With dead ends: 126 [2020-10-15 16:55:53,466 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 16:55:53,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1053, Invalid=2253, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 16:55:53,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 16:55:53,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 90. [2020-10-15 16:55:53,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 16:55:53,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 221 transitions. [2020-10-15 16:55:53,468 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 221 transitions. Word has length 35 [2020-10-15 16:55:53,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:55:53,468 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 221 transitions. [2020-10-15 16:55:53,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:55:53,469 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 221 transitions. [2020-10-15 16:55:53,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 16:55:53,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:55:53,469 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:55:53,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:53,671 INFO L429 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:55:53,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:55:53,672 INFO L82 PathProgramCache]: Analyzing trace with hash -603414801, now seen corresponding path program 390 times [2020-10-15 16:55:53,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:55:53,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830607743] [2020-10-15 16:55:53,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:55:53,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:55:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:55,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830607743] [2020-10-15 16:55:55,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674877926] [2020-10-15 16:55:55,121 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 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:55,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-10-15 16:55:55,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:55:55,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 16:55:55,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:55:55,255 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:55:55,276 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:55,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:55:55,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-15 16:55:55,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315704730] [2020-10-15 16:55:55,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 16:55:55,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:55:55,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 16:55:55,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:55:55,277 INFO L87 Difference]: Start difference. First operand 90 states and 221 transitions. Second operand 32 states. [2020-10-15 16:55:58,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:55:58,158 INFO L93 Difference]: Finished difference Result 154 states and 349 transitions. [2020-10-15 16:55:58,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:55:58,161 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-15 16:55:58,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:55:58,161 INFO L225 Difference]: With dead ends: 154 [2020-10-15 16:55:58,161 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 16:55:58,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1062, Invalid=2478, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:55:58,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 16:55:58,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 88. [2020-10-15 16:55:58,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 16:55:58,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 217 transitions. [2020-10-15 16:55:58,164 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 217 transitions. Word has length 35 [2020-10-15 16:55:58,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:55:58,164 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 217 transitions. [2020-10-15 16:55:58,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 16:55:58,164 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 217 transitions. [2020-10-15 16:55:58,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 16:55:58,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:55:58,164 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:55:58,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable391 [2020-10-15 16:55:58,365 INFO L429 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:55:58,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:55:58,366 INFO L82 PathProgramCache]: Analyzing trace with hash 193462125, now seen corresponding path program 391 times [2020-10-15 16:55:58,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:55:58,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305741920] [2020-10-15 16:55:58,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:55:58,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:56:00,238 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:00,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305741920] [2020-10-15 16:56:00,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642315759] [2020-10-15 16:56:00,238 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 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:56:00,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 16:56:00,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:56:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:00,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:56:00,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-15 16:56:00,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647608946] [2020-10-15 16:56:00,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:56:00,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:56:00,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:56:00,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:56:00,317 INFO L87 Difference]: Start difference. First operand 88 states and 217 transitions. Second operand 31 states. [2020-10-15 16:56:02,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:56:02,759 INFO L93 Difference]: Finished difference Result 155 states and 353 transitions. [2020-10-15 16:56:02,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:56:02,762 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-15 16:56:02,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:56:02,763 INFO L225 Difference]: With dead ends: 155 [2020-10-15 16:56:02,763 INFO L226 Difference]: Without dead ends: 149 [2020-10-15 16:56:02,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1061, Invalid=2599, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 16:56:02,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-15 16:56:02,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 91. [2020-10-15 16:56:02,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 16:56:02,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 225 transitions. [2020-10-15 16:56:02,765 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 225 transitions. Word has length 35 [2020-10-15 16:56:02,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:56:02,765 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 225 transitions. [2020-10-15 16:56:02,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:56:02,765 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 225 transitions. [2020-10-15 16:56:02,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 16:56:02,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:56:02,766 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:56:02,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:02,966 INFO L429 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:56:02,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:56:02,967 INFO L82 PathProgramCache]: Analyzing trace with hash -235711279, now seen corresponding path program 392 times [2020-10-15 16:56:02,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:56:02,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386713567] [2020-10-15 16:56:02,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:56:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:56:04,748 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:04,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386713567] [2020-10-15 16:56:04,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113348840] [2020-10-15 16:56:04,749 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 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:04,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:56:04,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:56:04,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 16:56:04,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:56:04,892 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:56:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:04,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:56:04,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-15 16:56:04,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32264331] [2020-10-15 16:56:04,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 16:56:04,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:56:04,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 16:56:04,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:56:04,924 INFO L87 Difference]: Start difference. First operand 91 states and 225 transitions. Second operand 32 states. [2020-10-15 16:56:07,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:56:07,955 INFO L93 Difference]: Finished difference Result 179 states and 401 transitions. [2020-10-15 16:56:07,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:56:07,959 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-15 16:56:07,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:56:07,960 INFO L225 Difference]: With dead ends: 179 [2020-10-15 16:56:07,960 INFO L226 Difference]: Without dead ends: 173 [2020-10-15 16:56:07,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1105, Invalid=2801, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 16:56:07,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-15 16:56:07,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 90. [2020-10-15 16:56:07,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 16:56:07,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 223 transitions. [2020-10-15 16:56:07,962 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 223 transitions. Word has length 35 [2020-10-15 16:56:07,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:56:07,962 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 223 transitions. [2020-10-15 16:56:07,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 16:56:07,962 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 223 transitions. [2020-10-15 16:56:07,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 16:56:07,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:56:07,962 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:56:08,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,390 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:08,163 INFO L429 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:56:08,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:56:08,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1244445903, now seen corresponding path program 393 times [2020-10-15 16:56:08,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:56:08,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663842878] [2020-10-15 16:56:08,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:56:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:56:09,457 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:09,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663842878] [2020-10-15 16:56:09,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154392284] [2020-10-15 16:56:09,458 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 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:09,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-10-15 16:56:09,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:56:09,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 16:56:09,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:56:09,567 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:09,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:56:09,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-15 16:56:09,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760644857] [2020-10-15 16:56:09,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:56:09,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:56:09,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:56:09,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:56:09,568 INFO L87 Difference]: Start difference. First operand 90 states and 223 transitions. Second operand 31 states. [2020-10-15 16:56:12,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:56:12,325 INFO L93 Difference]: Finished difference Result 179 states and 403 transitions. [2020-10-15 16:56:12,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:56:12,331 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-15 16:56:12,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:56:12,332 INFO L225 Difference]: With dead ends: 179 [2020-10-15 16:56:12,332 INFO L226 Difference]: Without dead ends: 173 [2020-10-15 16:56:12,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1118, Invalid=2914, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 16:56:12,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-15 16:56:12,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 93. [2020-10-15 16:56:12,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:56:12,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 231 transitions. [2020-10-15 16:56:12,335 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 231 transitions. Word has length 35 [2020-10-15 16:56:12,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:56:12,335 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 231 transitions. [2020-10-15 16:56:12,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:56:12,335 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 231 transitions. [2020-10-15 16:56:12,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 16:56:12,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:56:12,335 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:56:12,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:12,536 INFO L429 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:56:12,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:56:12,536 INFO L82 PathProgramCache]: Analyzing trace with hash -579462349, now seen corresponding path program 394 times [2020-10-15 16:56:12,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:56:12,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123902960] [2020-10-15 16:56:12,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:56:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:56:14,195 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:14,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123902960] [2020-10-15 16:56:14,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825254501] [2020-10-15 16:56:14,195 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 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:14,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:56:14,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:56:14,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 16:56:14,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:56:14,348 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:56:14,381 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:14,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:56:14,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-15 16:56:14,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331811560] [2020-10-15 16:56:14,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 16:56:14,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:56:14,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 16:56:14,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:56:14,382 INFO L87 Difference]: Start difference. First operand 93 states and 231 transitions. Second operand 32 states. [2020-10-15 16:56:18,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:56:18,056 INFO L93 Difference]: Finished difference Result 176 states and 397 transitions. [2020-10-15 16:56:18,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:56:18,062 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-15 16:56:18,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:56:18,063 INFO L225 Difference]: With dead ends: 176 [2020-10-15 16:56:18,063 INFO L226 Difference]: Without dead ends: 170 [2020-10-15 16:56:18,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1118, Invalid=3042, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 16:56:18,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-15 16:56:18,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 92. [2020-10-15 16:56:18,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:56:18,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 229 transitions. [2020-10-15 16:56:18,066 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 229 transitions. Word has length 35 [2020-10-15 16:56:18,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:56:18,066 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 229 transitions. [2020-10-15 16:56:18,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 16:56:18,066 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 229 transitions. [2020-10-15 16:56:18,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 16:56:18,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:56:18,066 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:56:18,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:18,267 INFO L429 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:56:18,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:56:18,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1404736847, now seen corresponding path program 395 times [2020-10-15 16:56:18,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:56:18,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080073518] [2020-10-15 16:56:18,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:56:18,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:56:19,578 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:19,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080073518] [2020-10-15 16:56:19,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813659692] [2020-10-15 16:56:19,579 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 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:19,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-10-15 16:56:19,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:56:19,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 16:56:19,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:56:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:19,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:56:19,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-15 16:56:19,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943239701] [2020-10-15 16:56:19,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:56:19,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:56:19,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:56:19,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:56:19,673 INFO L87 Difference]: Start difference. First operand 92 states and 229 transitions. Second operand 31 states. [2020-10-15 16:56:22,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:56:22,515 INFO L93 Difference]: Finished difference Result 177 states and 401 transitions. [2020-10-15 16:56:22,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:56:22,518 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-15 16:56:22,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:56:22,519 INFO L225 Difference]: With dead ends: 177 [2020-10-15 16:56:22,519 INFO L226 Difference]: Without dead ends: 171 [2020-10-15 16:56:22,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1146, Invalid=3144, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 16:56:22,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-15 16:56:22,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 95. [2020-10-15 16:56:22,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-15 16:56:22,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 237 transitions. [2020-10-15 16:56:22,522 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 237 transitions. Word has length 35 [2020-10-15 16:56:22,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:56:22,522 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 237 transitions. [2020-10-15 16:56:22,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:56:22,523 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 237 transitions. [2020-10-15 16:56:22,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 16:56:22,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:56:22,523 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:56:22,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:22,724 INFO L429 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:56:22,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:56:22,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1851462165, now seen corresponding path program 396 times [2020-10-15 16:56:22,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:56:22,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889805277] [2020-10-15 16:56:22,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:56:22,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:56:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:24,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889805277] [2020-10-15 16:56:24,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619926254] [2020-10-15 16:56:24,091 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 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:24,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-10-15 16:56:24,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:56:24,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 16:56:24,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:56:24,237 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:56:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:24,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:56:24,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-15 16:56:24,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331513809] [2020-10-15 16:56:24,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 16:56:24,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:56:24,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 16:56:24,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:56:24,267 INFO L87 Difference]: Start difference. First operand 95 states and 237 transitions. Second operand 32 states. [2020-10-15 16:56:27,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:56:27,695 INFO L93 Difference]: Finished difference Result 174 states and 395 transitions. [2020-10-15 16:56:27,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:56:27,701 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-15 16:56:27,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:56:27,702 INFO L225 Difference]: With dead ends: 174 [2020-10-15 16:56:27,702 INFO L226 Difference]: Without dead ends: 168 [2020-10-15 16:56:27,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1147, Invalid=3275, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 16:56:27,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-15 16:56:27,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 94. [2020-10-15 16:56:27,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 16:56:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 235 transitions. [2020-10-15 16:56:27,705 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 235 transitions. Word has length 35 [2020-10-15 16:56:27,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:56:27,705 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 235 transitions. [2020-10-15 16:56:27,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 16:56:27,705 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 235 transitions. [2020-10-15 16:56:27,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 16:56:27,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:56:27,706 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:56:27,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2020-10-15 16:56:27,907 INFO L429 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:56:27,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:56:27,907 INFO L82 PathProgramCache]: Analyzing trace with hash -2028721901, now seen corresponding path program 397 times [2020-10-15 16:56:27,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:56:27,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400729117] [2020-10-15 16:56:27,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:56:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:56:29,234 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:29,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400729117] [2020-10-15 16:56:29,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34438544] [2020-10-15 16:56:29,235 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 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:56:29,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 16:56:29,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:56:29,331 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:29,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:56:29,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-15 16:56:29,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872366075] [2020-10-15 16:56:29,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:56:29,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:56:29,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:56:29,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:56:29,332 INFO L87 Difference]: Start difference. First operand 94 states and 235 transitions. Second operand 31 states. [2020-10-15 16:56:32,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:56:32,449 INFO L93 Difference]: Finished difference Result 175 states and 399 transitions. [2020-10-15 16:56:32,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 16:56:32,453 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-15 16:56:32,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:56:32,453 INFO L225 Difference]: With dead ends: 175 [2020-10-15 16:56:32,453 INFO L226 Difference]: Without dead ends: 169 [2020-10-15 16:56:32,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1190, Invalid=3366, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 16:56:32,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-15 16:56:32,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 97. [2020-10-15 16:56:32,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 16:56:32,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 243 transitions. [2020-10-15 16:56:32,456 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 243 transitions. Word has length 35 [2020-10-15 16:56:32,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:56:32,456 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 243 transitions. [2020-10-15 16:56:32,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:56:32,457 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 243 transitions. [2020-10-15 16:56:32,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 16:56:32,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:56:32,457 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:56:32,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable398,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:32,658 INFO L429 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:56:32,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:56:32,658 INFO L82 PathProgramCache]: Analyzing trace with hash 544495991, now seen corresponding path program 398 times [2020-10-15 16:56:32,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:56:32,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740016262] [2020-10-15 16:56:32,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:56:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:56:33,935 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:33,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740016262] [2020-10-15 16:56:33,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117740669] [2020-10-15 16:56:33,936 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 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:33,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:56:33,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:56:33,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 16:56:33,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:56:34,069 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:56:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:34,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:56:34,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-15 16:56:34,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618911853] [2020-10-15 16:56:34,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 16:56:34,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:56:34,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 16:56:34,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:56:34,110 INFO L87 Difference]: Start difference. First operand 97 states and 243 transitions. Second operand 32 states. [2020-10-15 16:56:37,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:56:37,594 INFO L93 Difference]: Finished difference Result 172 states and 393 transitions. [2020-10-15 16:56:37,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 16:56:37,599 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-15 16:56:37,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:56:37,599 INFO L225 Difference]: With dead ends: 172 [2020-10-15 16:56:37,599 INFO L226 Difference]: Without dead ends: 166 [2020-10-15 16:56:37,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1192, Invalid=3500, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 16:56:37,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-15 16:56:37,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 96. [2020-10-15 16:56:37,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 16:56:37,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 241 transitions. [2020-10-15 16:56:37,602 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 241 transitions. Word has length 35 [2020-10-15 16:56:37,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:56:37,602 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 241 transitions. [2020-10-15 16:56:37,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 16:56:37,603 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 241 transitions. [2020-10-15 16:56:37,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 16:56:37,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:56:37,603 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:56:37,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2020-10-15 16:56:37,804 INFO L429 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:56:37,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:56:37,804 INFO L82 PathProgramCache]: Analyzing trace with hash -639428619, now seen corresponding path program 399 times [2020-10-15 16:56:37,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:56:37,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742942823] [2020-10-15 16:56:37,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:56:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:56:39,080 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:39,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742942823] [2020-10-15 16:56:39,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143253538] [2020-10-15 16:56:39,081 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 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:39,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-10-15 16:56:39,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:56:39,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 16:56:39,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:56:39,192 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:39,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:56:39,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-15 16:56:39,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700040383] [2020-10-15 16:56:39,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:56:39,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:56:39,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:56:39,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:56:39,193 INFO L87 Difference]: Start difference. First operand 96 states and 241 transitions. Second operand 31 states. [2020-10-15 16:56:42,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:56:42,723 INFO L93 Difference]: Finished difference Result 173 states and 397 transitions. [2020-10-15 16:56:42,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 16:56:42,728 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-15 16:56:42,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:56:42,729 INFO L225 Difference]: With dead ends: 173 [2020-10-15 16:56:42,729 INFO L226 Difference]: Without dead ends: 167 [2020-10-15 16:56:42,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1250, Invalid=3580, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 16:56:42,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-15 16:56:42,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 99. [2020-10-15 16:56:42,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:56:42,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 249 transitions. [2020-10-15 16:56:42,736 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 249 transitions. Word has length 35 [2020-10-15 16:56:42,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:56:42,736 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 249 transitions. [2020-10-15 16:56:42,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:56:42,737 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 249 transitions. [2020-10-15 16:56:42,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 16:56:42,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:56:42,737 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:56:42,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2020-10-15 16:56:42,938 INFO L429 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:56:42,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:56:42,938 INFO L82 PathProgramCache]: Analyzing trace with hash 2107380057, now seen corresponding path program 400 times [2020-10-15 16:56:42,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:56:42,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857500575] [2020-10-15 16:56:42,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:56:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2020-10-15 16:56:42,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401 [2020-10-15 16:56:42,984 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-15 16:56:42,989 WARN L235 ceAbstractionStarter]: Timeout [2020-10-15 16:56:42,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 04:56:42 BasicIcfg [2020-10-15 16:56:42,990 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 16:56:42,992 INFO L168 Benchmark]: Toolchain (without parser) took 850521.44 ms. Allocated memory was 251.7 MB in the beginning and 223.3 MB in the end (delta: -28.3 MB). Free memory was 206.0 MB in the beginning and 148.9 MB in the end (delta: 57.1 MB). Peak memory consumption was 28.8 MB. Max. memory is 14.2 GB. [2020-10-15 16:56:42,993 INFO L168 Benchmark]: CDTParser took 1.37 ms. Allocated memory is still 251.7 MB. Free memory is still 228.0 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 16:56:42,993 INFO L168 Benchmark]: CACSL2BoogieTranslator took 732.53 ms. Allocated memory was 251.7 MB in the beginning and 315.1 MB in the end (delta: 63.4 MB). Free memory was 206.0 MB in the beginning and 271.5 MB in the end (delta: -65.5 MB). Peak memory consumption was 29.6 MB. Max. memory is 14.2 GB. [2020-10-15 16:56:42,993 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.19 ms. Allocated memory is still 315.1 MB. Free memory was 271.5 MB in the beginning and 269.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 16:56:42,994 INFO L168 Benchmark]: Boogie Preprocessor took 28.68 ms. Allocated memory is still 315.1 MB. Free memory is still 269.0 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 16:56:42,994 INFO L168 Benchmark]: RCFGBuilder took 363.00 ms. Allocated memory is still 315.1 MB. Free memory was 269.0 MB in the beginning and 246.3 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.7 MB. Max. memory is 14.2 GB. [2020-10-15 16:56:42,995 INFO L168 Benchmark]: TraceAbstraction took 849345.31 ms. Allocated memory was 315.1 MB in the beginning and 223.3 MB in the end (delta: -91.8 MB). Free memory was 246.3 MB in the beginning and 148.9 MB in the end (delta: 97.4 MB). Peak memory consumption was 5.6 MB. Max. memory is 14.2 GB. [2020-10-15 16:56:42,997 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.37 ms. Allocated memory is still 251.7 MB. Free memory is still 228.0 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 732.53 ms. Allocated memory was 251.7 MB in the beginning and 315.1 MB in the end (delta: 63.4 MB). Free memory was 206.0 MB in the beginning and 271.5 MB in the end (delta: -65.5 MB). Peak memory consumption was 29.6 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 45.19 ms. Allocated memory is still 315.1 MB. Free memory was 271.5 MB in the beginning and 269.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 28.68 ms. Allocated memory is still 315.1 MB. Free memory is still 269.0 MB. There was no memory consumed. Max. memory is 14.2 GB. * RCFGBuilder took 363.00 ms. Allocated memory is still 315.1 MB. Free memory was 269.0 MB in the beginning and 246.3 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.7 MB. Max. memory is 14.2 GB. * TraceAbstraction took 849345.31 ms. Allocated memory was 315.1 MB in the beginning and 223.3 MB in the end (delta: -91.8 MB). Free memory was 246.3 MB in the beginning and 148.9 MB in the end (delta: 97.4 MB). Peak memory consumption was 5.6 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 618 VarBasedMoverChecksPositive, 16 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.3s, 57 PlacesBefore, 20 PlacesAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 45 TotalNumberOfCompositions, 911 MoverChecksTotal - TimeoutResultAtElement [Line: 703]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 703). Cancelled while BasicCegarLoop was analyzing trace of length 36 with TraceHistMax 14,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 4 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 849.2s, OverallIterations: 402, TraceHistogramMax: 14, AutomataDifference: 552.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 6443 SDtfs, 27271 SDslu, 48800 SDs, 0 SdLazy, 55637 SolverSat, 39201 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 62.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28716 GetRequests, 9202 SyntacticMatches, 396 SemanticMatches, 19118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256992 ImplicationChecksByTransitivity, 607.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=114occurred in iteration=387, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 401 MinimizatonAttempts, 12849 StatesRemovedByMinimization, 400 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.2s SsaConstructionTime, 10.1s SatisfiabilityAnalysisTime, 188.3s InterpolantComputationTime, 20452 NumberOfCodeBlocks, 20452 NumberOfCodeBlocksAsserted, 2541 NumberOfCheckSat, 19655 ConstructedInterpolants, 0 QuantifiedInterpolants, 2415595 SizeOfPredicates, 7036 NumberOfNonLiveVariables, 60524 ConjunctsInSsa, 8631 ConjunctsInUnsatCore, 797 InterpolantComputations, 5 PerfectInterpolantSequences, 0/63596 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