/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/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-15 20:20:53,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 20:20:53,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 20:20:53,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 20:20:53,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 20:20:53,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 20:20:53,142 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 20:20:53,144 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 20:20:53,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 20:20:53,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 20:20:53,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 20:20:53,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 20:20:53,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 20:20:53,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 20:20:53,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 20:20:53,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 20:20:53,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 20:20:53,167 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 20:20:53,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 20:20:53,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 20:20:53,181 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 20:20:53,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 20:20:53,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 20:20:53,187 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 20:20:53,192 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 20:20:53,192 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 20:20:53,192 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 20:20:53,195 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 20:20:53,195 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 20:20:53,198 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 20:20:53,198 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 20:20:53,199 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 20:20:53,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 20:20:53,201 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 20:20:53,202 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 20:20:53,203 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 20:20:53,203 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 20:20:53,203 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 20:20:53,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 20:20:53,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 20:20:53,206 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 20:20:53,206 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf [2020-10-15 20:20:53,247 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 20:20:53,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 20:20:53,249 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 20:20:53,249 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 20:20:53,249 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 20:20:53,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 20:20:53,250 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 20:20:53,250 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 20:20:53,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 20:20:53,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 20:20:53,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 20:20:53,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 20:20:53,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 20:20:53,251 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 20:20:53,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 20:20:53,251 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 20:20:53,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 20:20:53,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 20:20:53,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 20:20:53,252 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 20:20:53,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 20:20:53,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 20:20:53,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 20:20:53,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 20:20:53,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 20:20:53,254 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 20:20:53,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 20:20:53,254 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 20:20:53,254 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-15 20:20:53,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 20:20:53,551 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 20:20:53,555 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 20:20:53,556 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 20:20:53,558 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 20:20:53,559 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2020-10-15 20:20:53,627 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c2ecc7d0/4d034e2fba194bb389d365fc4e57af65/FLAGba2e9a4d2 [2020-10-15 20:20:54,178 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 20:20:54,178 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2020-10-15 20:20:54,191 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c2ecc7d0/4d034e2fba194bb389d365fc4e57af65/FLAGba2e9a4d2 [2020-10-15 20:20:54,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c2ecc7d0/4d034e2fba194bb389d365fc4e57af65 [2020-10-15 20:20:54,489 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 20:20:54,490 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-15 20:20:54,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 20:20:54,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 20:20:54,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 20:20:54,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:20:54" (1/1) ... [2020-10-15 20:20:54,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52a0ce55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:20:54, skipping insertion in model container [2020-10-15 20:20:54,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:20:54" (1/1) ... [2020-10-15 20:20:54,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 20:20:54,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 20:20:54,985 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 20:20:54,996 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 20:20:55,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 20:20:55,131 INFO L208 MainTranslator]: Completed translation [2020-10-15 20:20:55,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:20:55 WrapperNode [2020-10-15 20:20:55,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 20:20:55,135 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-15 20:20:55,135 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-15 20:20:55,136 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-15 20:20:55,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:20:55" (1/1) ... [2020-10-15 20:20:55,174 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:20:55" (1/1) ... [2020-10-15 20:20:55,208 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-15 20:20:55,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 20:20:55,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 20:20:55,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 20:20:55,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:20:55" (1/1) ... [2020-10-15 20:20:55,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:20:55" (1/1) ... [2020-10-15 20:20:55,221 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:20:55" (1/1) ... [2020-10-15 20:20:55,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:20:55" (1/1) ... [2020-10-15 20:20:55,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:20:55" (1/1) ... [2020-10-15 20:20:55,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:20:55" (1/1) ... [2020-10-15 20:20:55,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:20:55" (1/1) ... [2020-10-15 20:20:55,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 20:20:55,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 20:20:55,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 20:20:55,238 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 20:20:55,239 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:20:55" (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 20:20:55,302 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-15 20:20:55,302 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-15 20:20:55,302 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-15 20:20:55,302 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-15 20:20:55,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 20:20:55,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-15 20:20:55,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 20:20:55,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 20:20:55,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-15 20:20:55,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 20:20:55,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 20:20:55,308 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 20:20:55,689 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 20:20:55,689 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-15 20:20:55,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:20:55 BoogieIcfgContainer [2020-10-15 20:20:55,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 20:20:55,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 20:20:55,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 20:20:55,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 20:20:55,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:20:54" (1/3) ... [2020-10-15 20:20:55,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cba8140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:20:55, skipping insertion in model container [2020-10-15 20:20:55,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:20:55" (2/3) ... [2020-10-15 20:20:55,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cba8140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:20:55, skipping insertion in model container [2020-10-15 20:20:55,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:20:55" (3/3) ... [2020-10-15 20:20:55,700 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2020-10-15 20:20:55,710 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-15 20:20:55,710 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-15 20:20:55,716 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 20:20:55,717 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-15 20:20:55,741 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,741 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,741 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,741 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,742 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,742 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,742 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,743 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,743 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,743 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,743 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,744 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,744 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,744 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,744 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,745 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,745 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,745 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,745 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,746 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,746 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,746 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,746 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,747 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,747 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,747 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,747 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,747 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,751 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,752 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,752 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,752 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,752 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,753 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,761 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,761 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,762 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,762 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,762 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,762 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:20:55,780 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-15 20:20:55,798 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 20:20:55,798 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 20:20:55,798 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 20:20:55,798 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 20:20:55,799 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 20:20:55,799 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 20:20:55,799 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 20:20:55,799 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 20:20:55,809 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 20:20:55,811 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-15 20:20:55,813 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-15 20:20:55,814 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-15 20:20:55,851 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-15 20:20:55,852 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-15 20:20:55,857 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 20:20:55,860 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-15 20:20:57,106 INFO L132 LiptonReduction]: Checked pairs total: 911 [2020-10-15 20:20:57,106 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-15 20:20:57,113 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-15 20:20:57,124 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-15 20:20:57,126 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-15 20:20:57,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-15 20:20:57,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:20:57,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-15 20:20:57,134 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:20:57,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:20:57,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-15 20:20:57,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:20:57,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880634717] [2020-10-15 20:20:57,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:20:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:20:57,354 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 20:20:57,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880634717] [2020-10-15 20:20:57,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 20:20:57,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 20:20:57,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3098390] [2020-10-15 20:20:57,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 20:20:57,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:20:57,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 20:20:57,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 20:20:57,380 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-15 20:20:57,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:20:57,450 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-15 20:20:57,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 20:20:57,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-15 20:20:57,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:20:57,465 INFO L225 Difference]: With dead ends: 75 [2020-10-15 20:20:57,465 INFO L226 Difference]: Without dead ends: 42 [2020-10-15 20:20:57,466 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 20:20:57,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-15 20:20:57,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-15 20:20:57,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 20:20:57,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-15 20:20:57,509 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-15 20:20:57,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:20:57,509 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-15 20:20:57,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 20:20:57,510 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-15 20:20:57,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 20:20:57,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:20:57,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:20:57,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 20:20:57,511 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:20:57,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:20:57,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-15 20:20:57,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:20:57,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598399362] [2020-10-15 20:20:57,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:20:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:20:57,650 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 20:20:57,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598399362] [2020-10-15 20:20:57,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 20:20:57,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 20:20:57,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100639634] [2020-10-15 20:20:57,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 20:20:57,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:20:57,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 20:20:57,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 20:20:57,657 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-15 20:20:57,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:20:57,715 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-15 20:20:57,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 20:20:57,715 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 20:20:57,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:20:57,717 INFO L225 Difference]: With dead ends: 56 [2020-10-15 20:20:57,717 INFO L226 Difference]: Without dead ends: 50 [2020-10-15 20:20:57,718 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 20:20:57,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-15 20:20:57,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-15 20:20:57,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 20:20:57,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-15 20:20:57,725 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-15 20:20:57,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:20:57,727 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-15 20:20:57,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 20:20:57,727 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-15 20:20:57,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 20:20:57,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:20:57,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:20:57,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 20:20:57,728 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:20:57,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:20:57,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-15 20:20:57,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:20:57,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234268261] [2020-10-15 20:20:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:20:57,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:20:57,799 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 20:20:57,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234268261] [2020-10-15 20:20:57,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 20:20:57,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 20:20:57,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388118739] [2020-10-15 20:20:57,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 20:20:57,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:20:57,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 20:20:57,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 20:20:57,802 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-15 20:20:57,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:20:57,877 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-15 20:20:57,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 20:20:57,877 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 20:20:57,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:20:57,879 INFO L225 Difference]: With dead ends: 78 [2020-10-15 20:20:57,879 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 20:20:57,880 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 20:20:57,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 20:20:57,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-15 20:20:57,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:20:57,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-15 20:20:57,892 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-15 20:20:57,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:20:57,893 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-15 20:20:57,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 20:20:57,893 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-15 20:20:57,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 20:20:57,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:20:57,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:20:57,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 20:20:57,895 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:20:57,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:20:57,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-15 20:20:57,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:20:57,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644465571] [2020-10-15 20:20:57,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:20:57,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:20:57,996 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 20:20:57,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644465571] [2020-10-15 20:20:57,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 20:20:57,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 20:20:57,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489057821] [2020-10-15 20:20:57,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 20:20:57,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:20:57,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 20:20:57,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 20:20:57,999 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-15 20:20:58,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:20:58,099 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-15 20:20:58,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 20:20:58,100 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 20:20:58,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:20:58,101 INFO L225 Difference]: With dead ends: 54 [2020-10-15 20:20:58,101 INFO L226 Difference]: Without dead ends: 43 [2020-10-15 20:20:58,103 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 20:20:58,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-15 20:20:58,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-15 20:20:58,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-15 20:20:58,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-15 20:20:58,109 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-15 20:20:58,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:20:58,110 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-15 20:20:58,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 20:20:58,110 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-15 20:20:58,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 20:20:58,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:20:58,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:20:58,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 20:20:58,112 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:20:58,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:20:58,112 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-15 20:20:58,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:20:58,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342359595] [2020-10-15 20:20:58,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:20:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:20:58,208 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 20:20:58,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342359595] [2020-10-15 20:20:58,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 20:20:58,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 20:20:58,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662596493] [2020-10-15 20:20:58,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 20:20:58,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:20:58,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 20:20:58,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 20:20:58,211 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-15 20:20:58,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:20:58,274 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-15 20:20:58,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 20:20:58,276 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 20:20:58,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:20:58,277 INFO L225 Difference]: With dead ends: 57 [2020-10-15 20:20:58,278 INFO L226 Difference]: Without dead ends: 51 [2020-10-15 20:20:58,278 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 20:20:58,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-15 20:20:58,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-15 20:20:58,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-15 20:20:58,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-15 20:20:58,284 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-15 20:20:58,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:20:58,285 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-15 20:20:58,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 20:20:58,285 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-15 20:20:58,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 20:20:58,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:20:58,286 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:20:58,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 20:20:58,286 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:20:58,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:20:58,287 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-15 20:20:58,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:20:58,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690176429] [2020-10-15 20:20:58,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:20:58,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:20:58,352 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 20:20:58,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690176429] [2020-10-15 20:20:58,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26949659] [2020-10-15 20:20:58,354 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 20:20:58,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:20:58,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:20:58,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 20:20:58,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:20:58,485 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:20:58,503 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 20:20:58,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:20:58,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 20:20:58,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218278487] [2020-10-15 20:20:58,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 20:20:58,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:20:58,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 20:20:58,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-15 20:20:58,505 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-15 20:20:58,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:20:58,610 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-15 20:20:58,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 20:20:58,610 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-15 20:20:58,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:20:58,611 INFO L225 Difference]: With dead ends: 48 [2020-10-15 20:20:58,611 INFO L226 Difference]: Without dead ends: 43 [2020-10-15 20:20:58,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:20:58,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-15 20:20:58,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-15 20:20:58,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-15 20:20:58,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-15 20:20:58,616 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-15 20:20:58,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:20:58,617 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-15 20:20:58,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 20:20:58,617 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-15 20:20:58,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 20:20:58,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:20:58,618 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:20:58,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-15 20:20:58,819 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:20:58,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:20:58,820 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-15 20:20:58,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:20:58,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353324573] [2020-10-15 20:20:58,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:20:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:20:58,889 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 20:20:58,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353324573] [2020-10-15 20:20:58,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283964915] [2020-10-15 20:20:58,890 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 20:20:58,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:20:58,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:20:58,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 20:20:58,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:20:58,952 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 20:20:58,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:20:58,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-15 20:20:58,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380624179] [2020-10-15 20:20:58,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 20:20:58,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:20:58,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 20:20:58,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-15 20:20:58,955 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-15 20:20:59,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:20:59,053 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-15 20:20:59,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 20:20:59,053 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-15 20:20:59,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:20:59,054 INFO L225 Difference]: With dead ends: 54 [2020-10-15 20:20:59,054 INFO L226 Difference]: Without dead ends: 48 [2020-10-15 20:20:59,055 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 20:20:59,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-15 20:20:59,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-15 20:20:59,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 20:20:59,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-15 20:20:59,068 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-15 20:20:59,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:20:59,069 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-15 20:20:59,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 20:20:59,070 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-15 20:20:59,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 20:20:59,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:20:59,071 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:20:59,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:20:59,272 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:20:59,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:20:59,273 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-15 20:20:59,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:20:59,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890069730] [2020-10-15 20:20:59,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:20:59,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:20:59,334 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 20:20:59,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890069730] [2020-10-15 20:20:59,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025715588] [2020-10-15 20:20:59,335 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 20:20:59,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 20:20:59,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:20:59,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 20:20:59,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:20:59,422 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:20:59,445 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 20:20:59,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:20:59,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 20:20:59,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171885780] [2020-10-15 20:20:59,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 20:20:59,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:20:59,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 20:20:59,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-15 20:20:59,450 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-15 20:20:59,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:20:59,558 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-15 20:20:59,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 20:20:59,558 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-15 20:20:59,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:20:59,559 INFO L225 Difference]: With dead ends: 58 [2020-10-15 20:20:59,559 INFO L226 Difference]: Without dead ends: 52 [2020-10-15 20:20:59,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:20:59,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-15 20:20:59,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-15 20:20:59,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-15 20:20:59,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-15 20:20:59,565 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-15 20:20:59,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:20:59,565 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-15 20:20:59,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 20:20:59,565 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-15 20:20:59,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 20:20:59,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:20:59,566 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:20:59,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:20:59,768 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:20:59,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:20:59,769 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-15 20:20:59,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:20:59,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199877605] [2020-10-15 20:20:59,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:20:59,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:20:59,818 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 20:20:59,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199877605] [2020-10-15 20:20:59,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047897407] [2020-10-15 20:20:59,819 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 20:20:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:20:59,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 20:20:59,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:20:59,891 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 20:20:59,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:20:59,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-15 20:20:59,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957809009] [2020-10-15 20:20:59,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 20:20:59,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:20:59,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 20:20:59,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-15 20:20:59,893 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-15 20:21:00,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:00,057 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-15 20:21:00,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:00,059 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-15 20:21:00,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:00,059 INFO L225 Difference]: With dead ends: 78 [2020-10-15 20:21:00,060 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 20:21:00,060 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 20:21:00,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 20:21:00,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-15 20:21:00,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:21:00,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-15 20:21:00,066 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-15 20:21:00,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:00,066 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-15 20:21:00,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 20:21:00,066 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-15 20:21:00,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 20:21:00,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:00,067 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:00,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:00,279 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:00,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:00,279 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-15 20:21:00,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:00,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449407605] [2020-10-15 20:21:00,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:00,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:00,338 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 20:21:00,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449407605] [2020-10-15 20:21:00,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263479058] [2020-10-15 20:21:00,339 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 20:21:00,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:00,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:00,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:21:00,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:00,449 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 20:21:00,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:00,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 20:21:00,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652060121] [2020-10-15 20:21:00,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 20:21:00,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:00,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 20:21:00,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-15 20:21:00,452 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-15 20:21:00,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:00,662 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-15 20:21:00,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 20:21:00,662 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-15 20:21:00,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:00,663 INFO L225 Difference]: With dead ends: 62 [2020-10-15 20:21:00,663 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 20:21:00,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:00,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 20:21:00,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-15 20:21:00,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-15 20:21:00,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-15 20:21:00,674 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-15 20:21:00,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:00,674 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-15 20:21:00,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 20:21:00,675 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-15 20:21:00,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 20:21:00,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:00,676 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:00,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-15 20:21:00,889 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:00,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:00,889 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-15 20:21:00,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:00,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46426914] [2020-10-15 20:21:00,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:00,949 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 20:21:00,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46426914] [2020-10-15 20:21:00,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171864692] [2020-10-15 20:21:00,950 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 20:21:00,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 20:21:00,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:00,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:21:00,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:01,019 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 20:21:01,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:01,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-15 20:21:01,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567382070] [2020-10-15 20:21:01,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 20:21:01,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:01,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 20:21:01,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-15 20:21:01,021 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-15 20:21:01,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:01,125 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-15 20:21:01,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 20:21:01,126 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-15 20:21:01,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:01,127 INFO L225 Difference]: With dead ends: 64 [2020-10-15 20:21:01,127 INFO L226 Difference]: Without dead ends: 58 [2020-10-15 20:21:01,127 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 20:21:01,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-15 20:21:01,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-15 20:21:01,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-15 20:21:01,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-15 20:21:01,132 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-15 20:21:01,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:01,132 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-15 20:21:01,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 20:21:01,132 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-15 20:21:01,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 20:21:01,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:01,133 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:01,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:01,334 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:01,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:01,335 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-15 20:21:01,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:01,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931593904] [2020-10-15 20:21:01,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:01,396 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 20:21:01,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931593904] [2020-10-15 20:21:01,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350215452] [2020-10-15 20:21:01,397 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 20:21:01,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:01,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:01,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:21:01,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:01,465 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:01,492 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 20:21:01,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:01,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 20:21:01,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81521229] [2020-10-15 20:21:01,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:01,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:01,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:01,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:01,495 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-15 20:21:01,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:01,661 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-15 20:21:01,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 20:21:01,662 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 20:21:01,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:01,663 INFO L225 Difference]: With dead ends: 61 [2020-10-15 20:21:01,663 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 20:21:01,664 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 20:21:01,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 20:21:01,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-15 20:21:01,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-15 20:21:01,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-15 20:21:01,668 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-15 20:21:01,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:01,668 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-15 20:21:01,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:01,669 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-15 20:21:01,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 20:21:01,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:01,669 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:01,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:01,881 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:01,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:01,882 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-15 20:21:01,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:01,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200197937] [2020-10-15 20:21:01,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:01,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:01,954 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 20:21:01,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200197937] [2020-10-15 20:21:01,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968207781] [2020-10-15 20:21:01,955 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 20:21:02,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:02,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:02,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:21:02,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:02,057 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 20:21:02,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:02,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-15 20:21:02,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477286293] [2020-10-15 20:21:02,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 20:21:02,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:02,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 20:21:02,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-15 20:21:02,062 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-15 20:21:02,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:02,220 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-15 20:21:02,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:02,220 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-15 20:21:02,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:02,224 INFO L225 Difference]: With dead ends: 77 [2020-10-15 20:21:02,225 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 20:21:02,225 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 20:21:02,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 20:21:02,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-15 20:21:02,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-15 20:21:02,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-15 20:21:02,236 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-15 20:21:02,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:02,238 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-15 20:21:02,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 20:21:02,239 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-15 20:21:02,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 20:21:02,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:02,239 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:02,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-15 20:21:02,455 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:02,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:02,455 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-15 20:21:02,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:02,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944328312] [2020-10-15 20:21:02,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:02,507 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 20:21:02,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944328312] [2020-10-15 20:21:02,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556273012] [2020-10-15 20:21:02,508 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 20:21:02,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 20:21:02,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:02,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:21:02,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:02,615 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:02,629 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 20:21:02,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:02,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 20:21:02,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791592104] [2020-10-15 20:21:02,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:02,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:02,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:02,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:02,632 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-15 20:21:02,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:02,848 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-10-15 20:21:02,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:21:02,850 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 20:21:02,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:02,851 INFO L225 Difference]: With dead ends: 58 [2020-10-15 20:21:02,851 INFO L226 Difference]: Without dead ends: 50 [2020-10-15 20:21:02,851 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 20:21:02,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-15 20:21:02,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-10-15 20:21:02,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-15 20:21:02,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-15 20:21:02,855 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-15 20:21:02,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:02,855 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-15 20:21:02,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:02,855 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-15 20:21:02,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 20:21:02,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:02,856 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:03,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:03,062 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:03,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:03,063 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-15 20:21:03,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:03,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742151193] [2020-10-15 20:21:03,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:03,136 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 20:21:03,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742151193] [2020-10-15 20:21:03,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555460028] [2020-10-15 20:21:03,137 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 20:21:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:03,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:21:03,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:03,192 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:03,201 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 20:21:03,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:03,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 20:21:03,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701885152] [2020-10-15 20:21:03,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:03,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:03,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:03,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:03,204 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-15 20:21:03,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:03,387 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-15 20:21:03,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:03,388 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 20:21:03,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:03,388 INFO L225 Difference]: With dead ends: 60 [2020-10-15 20:21:03,388 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 20:21:03,389 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 20:21:03,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 20:21:03,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-15 20:21:03,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:21:03,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-15 20:21:03,392 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-15 20:21:03,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:03,393 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-15 20:21:03,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:03,393 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-15 20:21:03,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:03,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:03,394 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:03,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-15 20:21:03,602 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:03,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:03,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-10-15 20:21:03,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:03,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963289004] [2020-10-15 20:21:03,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:03,660 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 20:21:03,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963289004] [2020-10-15 20:21:03,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962370030] [2020-10-15 20:21:03,661 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 20:21:03,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:03,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:03,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:03,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:03,726 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:03,734 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 20:21:03,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:03,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 20:21:03,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164160681] [2020-10-15 20:21:03,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:03,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:03,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:03,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:03,737 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-15 20:21:03,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:03,908 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-15 20:21:03,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:03,908 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 20:21:03,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:03,909 INFO L225 Difference]: With dead ends: 54 [2020-10-15 20:21:03,909 INFO L226 Difference]: Without dead ends: 49 [2020-10-15 20:21:03,910 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 20:21:03,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-15 20:21:03,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-15 20:21:03,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-15 20:21:03,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-15 20:21:03,912 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-15 20:21:03,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:03,913 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-15 20:21:03,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:03,913 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-15 20:21:03,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:03,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:03,915 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:04,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-15 20:21:04,124 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:04,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:04,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-15 20:21:04,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:04,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584966408] [2020-10-15 20:21:04,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:04,190 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 20:21:04,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584966408] [2020-10-15 20:21:04,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672640802] [2020-10-15 20:21:04,191 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 20:21:04,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:21:04,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:04,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:04,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:04,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:04,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-15 20:21:04,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701486346] [2020-10-15 20:21:04,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:04,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:04,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:04,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:04,246 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-15 20:21:04,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:04,356 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-15 20:21:04,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 20:21:04,356 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 20:21:04,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:04,357 INFO L225 Difference]: With dead ends: 60 [2020-10-15 20:21:04,358 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 20:21:04,358 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 20:21:04,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 20:21:04,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-15 20:21:04,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:21:04,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-15 20:21:04,362 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-15 20:21:04,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:04,362 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-15 20:21:04,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:04,362 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-15 20:21:04,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:04,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:04,363 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:04,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-15 20:21:04,574 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:04,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:04,575 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-15 20:21:04,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:04,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596660783] [2020-10-15 20:21:04,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:04,643 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 20:21:04,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596660783] [2020-10-15 20:21:04,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491315186] [2020-10-15 20:21:04,644 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 20:21:04,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:04,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:04,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:04,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:04,726 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:04,738 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 20:21:04,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:04,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 20:21:04,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088941499] [2020-10-15 20:21:04,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:04,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:04,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:04,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:04,743 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-15 20:21:04,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:04,881 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-15 20:21:04,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 20:21:04,881 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 20:21:04,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:04,882 INFO L225 Difference]: With dead ends: 66 [2020-10-15 20:21:04,882 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 20:21:04,883 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 20:21:04,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 20:21:04,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-15 20:21:04,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-15 20:21:04,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-15 20:21:04,886 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-15 20:21:04,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:04,887 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-15 20:21:04,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:04,887 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-15 20:21:04,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:04,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:04,887 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:05,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-15 20:21:05,095 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:05,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:05,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-15 20:21:05,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:05,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108927808] [2020-10-15 20:21:05,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:05,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:05,153 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 20:21:05,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108927808] [2020-10-15 20:21:05,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533622210] [2020-10-15 20:21:05,153 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 20:21:05,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:21:05,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:05,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:05,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:05,228 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 20:21:05,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:05,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-15 20:21:05,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820851332] [2020-10-15 20:21:05,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:05,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:05,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:05,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:05,230 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-15 20:21:05,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:05,382 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-15 20:21:05,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 20:21:05,382 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 20:21:05,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:05,383 INFO L225 Difference]: With dead ends: 67 [2020-10-15 20:21:05,383 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 20:21:05,384 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 20:21:05,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 20:21:05,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-15 20:21:05,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-15 20:21:05,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-15 20:21:05,387 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-15 20:21:05,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:05,387 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-15 20:21:05,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:05,387 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-15 20:21:05,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:05,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:05,388 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:05,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:05,597 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:05,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:05,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-15 20:21:05,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:05,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115170761] [2020-10-15 20:21:05,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:05,657 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 20:21:05,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115170761] [2020-10-15 20:21:05,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088339995] [2020-10-15 20:21:05,658 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 20:21:05,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:21:05,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:05,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:05,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:05,721 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:05,738 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 20:21:05,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:05,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 20:21:05,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785091845] [2020-10-15 20:21:05,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:05,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:05,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:05,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:05,740 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-15 20:21:05,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:05,934 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-15 20:21:05,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:21:05,934 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 20:21:05,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:05,935 INFO L225 Difference]: With dead ends: 69 [2020-10-15 20:21:05,935 INFO L226 Difference]: Without dead ends: 63 [2020-10-15 20:21:05,936 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 20:21:05,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-15 20:21:05,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-15 20:21:05,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:21:05,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-15 20:21:05,939 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-15 20:21:05,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:05,939 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-15 20:21:05,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:05,939 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-15 20:21:05,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:05,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:05,940 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:06,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:06,141 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:06,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:06,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-15 20:21:06,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:06,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740982409] [2020-10-15 20:21:06,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:06,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:06,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740982409] [2020-10-15 20:21:06,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780670587] [2020-10-15 20:21:06,193 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 20:21:06,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:06,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:06,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:06,246 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 20:21:06,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:06,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-15 20:21:06,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856176675] [2020-10-15 20:21:06,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:06,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:06,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:06,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:06,248 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-15 20:21:06,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:06,460 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-15 20:21:06,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:06,460 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 20:21:06,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:06,461 INFO L225 Difference]: With dead ends: 88 [2020-10-15 20:21:06,461 INFO L226 Difference]: Without dead ends: 82 [2020-10-15 20:21:06,462 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 20:21:06,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-15 20:21:06,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-15 20:21:06,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 20:21:06,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-15 20:21:06,466 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-15 20:21:06,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:06,466 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-15 20:21:06,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:06,466 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-15 20:21:06,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:06,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:06,467 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:06,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:06,677 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:06,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:06,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-15 20:21:06,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:06,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058997227] [2020-10-15 20:21:06,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:06,730 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 20:21:06,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058997227] [2020-10-15 20:21:06,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083505395] [2020-10-15 20:21:06,730 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 20:21:06,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:06,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:06,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:06,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:06,788 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:06,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:06,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 20:21:06,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127534255] [2020-10-15 20:21:06,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:06,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:06,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:06,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:06,800 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-15 20:21:07,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:07,086 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-15 20:21:07,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:21:07,089 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 20:21:07,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:07,090 INFO L225 Difference]: With dead ends: 69 [2020-10-15 20:21:07,090 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 20:21:07,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:21:07,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 20:21:07,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-15 20:21:07,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-15 20:21:07,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-15 20:21:07,093 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-15 20:21:07,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:07,094 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-15 20:21:07,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:07,094 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-15 20:21:07,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:07,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:07,095 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:07,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-15 20:21:07,304 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:07,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:07,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-15 20:21:07,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:07,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354194313] [2020-10-15 20:21:07,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:07,422 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 20:21:07,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354194313] [2020-10-15 20:21:07,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656792940] [2020-10-15 20:21:07,422 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 20:21:07,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:21:07,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:07,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:07,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:07,489 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 20:21:07,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:07,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-15 20:21:07,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221625166] [2020-10-15 20:21:07,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:07,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:07,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:07,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:07,491 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-15 20:21:07,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:07,624 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-15 20:21:07,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:07,624 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-15 20:21:07,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:07,625 INFO L225 Difference]: With dead ends: 74 [2020-10-15 20:21:07,625 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 20:21:07,626 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 20:21:07,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 20:21:07,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-15 20:21:07,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 20:21:07,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-15 20:21:07,628 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-15 20:21:07,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:07,629 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-15 20:21:07,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:07,629 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-15 20:21:07,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:07,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:07,630 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:07,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-15 20:21:07,837 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:07,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:07,838 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-15 20:21:07,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:07,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646385278] [2020-10-15 20:21:07,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:07,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:07,910 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 20:21:07,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646385278] [2020-10-15 20:21:07,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182124158] [2020-10-15 20:21:07,911 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 20:21:07,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:07,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:07,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:07,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:07,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:07,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:07,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:07,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 20:21:07,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965216269] [2020-10-15 20:21:07,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:07,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:07,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:07,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:07,986 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-15 20:21:08,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:08,185 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-15 20:21:08,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:21:08,186 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 20:21:08,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:08,187 INFO L225 Difference]: With dead ends: 71 [2020-10-15 20:21:08,187 INFO L226 Difference]: Without dead ends: 65 [2020-10-15 20:21:08,188 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 20:21:08,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-15 20:21:08,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-15 20:21:08,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 20:21:08,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-15 20:21:08,190 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-15 20:21:08,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:08,190 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-15 20:21:08,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:08,191 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-15 20:21:08,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:08,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:08,191 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:08,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-15 20:21:08,397 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:08,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:08,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-15 20:21:08,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:08,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390113024] [2020-10-15 20:21:08,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:08,463 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 20:21:08,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390113024] [2020-10-15 20:21:08,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407026033] [2020-10-15 20:21:08,464 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 20:21:08,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:21:08,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:08,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:08,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:08,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:08,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-15 20:21:08,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502060847] [2020-10-15 20:21:08,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:08,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:08,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:08,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:08,544 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-15 20:21:08,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:08,725 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-15 20:21:08,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 20:21:08,726 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-15 20:21:08,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:08,727 INFO L225 Difference]: With dead ends: 68 [2020-10-15 20:21:08,727 INFO L226 Difference]: Without dead ends: 62 [2020-10-15 20:21:08,728 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 20:21:08,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-15 20:21:08,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-15 20:21:08,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 20:21:08,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-15 20:21:08,732 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-15 20:21:08,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:08,732 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-15 20:21:08,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:08,732 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-15 20:21:08,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:08,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:08,733 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:08,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-15 20:21:08,940 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:08,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:08,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-15 20:21:08,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:08,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606684058] [2020-10-15 20:21:08,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:08,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:09,025 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 20:21:09,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606684058] [2020-10-15 20:21:09,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566454737] [2020-10-15 20:21:09,028 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 20:21:09,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:21:09,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:09,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:09,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:09,100 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:09,109 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 20:21:09,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:09,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 20:21:09,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263037338] [2020-10-15 20:21:09,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:09,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:09,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:09,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:09,110 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-15 20:21:09,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:09,386 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-15 20:21:09,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:21:09,387 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 20:21:09,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:09,388 INFO L225 Difference]: With dead ends: 67 [2020-10-15 20:21:09,388 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 20:21:09,388 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 20:21:09,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 20:21:09,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-15 20:21:09,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 20:21:09,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-15 20:21:09,391 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-15 20:21:09,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:09,392 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-15 20:21:09,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:09,392 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-15 20:21:09,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:09,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:09,392 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:09,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-15 20:21:09,597 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:09,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:09,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-15 20:21:09,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:09,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554394546] [2020-10-15 20:21:09,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:09,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:09,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554394546] [2020-10-15 20:21:09,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899047446] [2020-10-15 20:21:09,659 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 20:21:09,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:09,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:09,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:09,749 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 20:21:09,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:09,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-15 20:21:09,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605221142] [2020-10-15 20:21:09,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:09,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:09,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:09,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:09,750 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-15 20:21:09,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:09,974 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-15 20:21:09,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:09,975 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-15 20:21:09,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:09,976 INFO L225 Difference]: With dead ends: 83 [2020-10-15 20:21:09,976 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 20:21:09,977 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 20:21:09,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 20:21:09,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-15 20:21:09,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 20:21:09,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-15 20:21:09,981 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-15 20:21:09,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:09,981 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-15 20:21:09,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:09,982 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-15 20:21:09,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:09,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:09,982 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:10,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:10,192 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:10,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:10,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-15 20:21:10,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:10,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406983300] [2020-10-15 20:21:10,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:10,248 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 20:21:10,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406983300] [2020-10-15 20:21:10,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692479496] [2020-10-15 20:21:10,248 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 20:21:10,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:10,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:10,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:10,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:10,313 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:10,321 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 20:21:10,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:10,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 20:21:10,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754938122] [2020-10-15 20:21:10,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:10,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:10,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:10,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:10,323 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-15 20:21:10,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:10,633 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-10-15 20:21:10,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:21:10,633 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 20:21:10,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:10,634 INFO L225 Difference]: With dead ends: 64 [2020-10-15 20:21:10,634 INFO L226 Difference]: Without dead ends: 56 [2020-10-15 20:21:10,635 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 20:21:10,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-15 20:21:10,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2020-10-15 20:21:10,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-15 20:21:10,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-15 20:21:10,637 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-15 20:21:10,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:10,638 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-15 20:21:10,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:10,638 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-15 20:21:10,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:10,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:10,638 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:10,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-15 20:21:10,847 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:10,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:10,847 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-15 20:21:10,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:10,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114709180] [2020-10-15 20:21:10,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:10,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114709180] [2020-10-15 20:21:10,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923956316] [2020-10-15 20:21:10,908 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 20:21:10,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:21:10,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:10,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:10,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:10,975 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:10,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:10,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 20:21:10,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141020816] [2020-10-15 20:21:10,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:10,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:10,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:10,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:10,990 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-15 20:21:11,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:11,289 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-15 20:21:11,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:11,290 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 20:21:11,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:11,290 INFO L225 Difference]: With dead ends: 68 [2020-10-15 20:21:11,291 INFO L226 Difference]: Without dead ends: 63 [2020-10-15 20:21:11,291 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 20:21:11,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-15 20:21:11,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-15 20:21:11,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 20:21:11,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-15 20:21:11,296 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-15 20:21:11,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:11,296 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-15 20:21:11,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:11,297 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-15 20:21:11,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:11,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:11,297 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:11,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-15 20:21:11,498 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:11,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:11,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-15 20:21:11,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:11,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344328582] [2020-10-15 20:21:11,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:11,566 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 20:21:11,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344328582] [2020-10-15 20:21:11,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504859901] [2020-10-15 20:21:11,567 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 20:21:11,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:11,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:11,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:11,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:11,633 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:11,647 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 20:21:11,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:11,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 20:21:11,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468717385] [2020-10-15 20:21:11,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:11,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:11,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:11,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:11,650 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-15 20:21:11,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:11,960 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-15 20:21:11,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:11,961 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 20:21:11,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:11,962 INFO L225 Difference]: With dead ends: 60 [2020-10-15 20:21:11,962 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 20:21:11,963 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 20:21:11,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 20:21:11,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-15 20:21:11,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 20:21:11,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-15 20:21:11,967 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-15 20:21:11,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:11,967 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-15 20:21:11,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:11,967 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-15 20:21:11,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:11,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:11,968 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:12,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:12,177 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:12,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:12,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-15 20:21:12,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:12,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207169367] [2020-10-15 20:21:12,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:12,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:12,270 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 20:21:12,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207169367] [2020-10-15 20:21:12,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046464788] [2020-10-15 20:21:12,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:21:12,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 20:21:12,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:12,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:12,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:12,357 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 20:21:12,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:12,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 20:21:12,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801185881] [2020-10-15 20:21:12,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:12,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:12,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:12,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:12,359 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-15 20:21:12,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:12,497 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-15 20:21:12,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:12,498 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 20:21:12,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:12,499 INFO L225 Difference]: With dead ends: 66 [2020-10-15 20:21:12,499 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 20:21:12,499 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 20:21:12,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 20:21:12,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-15 20:21:12,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 20:21:12,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-15 20:21:12,502 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-15 20:21:12,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:12,502 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-15 20:21:12,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:12,502 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-15 20:21:12,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:12,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:12,502 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:12,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:12,706 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:12,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:12,706 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-15 20:21:12,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:12,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533713049] [2020-10-15 20:21:12,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:12,788 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 20:21:12,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533713049] [2020-10-15 20:21:12,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427003669] [2020-10-15 20:21:12,788 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 20:21:12,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 20:21:12,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:12,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:12,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:12,846 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:12,856 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 20:21:12,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:12,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 20:21:12,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989314843] [2020-10-15 20:21:12,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:12,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:12,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:12,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:12,858 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-15 20:21:13,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:13,033 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-15 20:21:13,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:21:13,033 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 20:21:13,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:13,034 INFO L225 Difference]: With dead ends: 74 [2020-10-15 20:21:13,034 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 20:21:13,035 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 20:21:13,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 20:21:13,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-15 20:21:13,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-15 20:21:13,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-15 20:21:13,037 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-15 20:21:13,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:13,037 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-15 20:21:13,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:13,037 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-15 20:21:13,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:13,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:13,038 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:13,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-15 20:21:13,239 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:13,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:13,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-15 20:21:13,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:13,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465131233] [2020-10-15 20:21:13,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:13,313 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 20:21:13,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465131233] [2020-10-15 20:21:13,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404256567] [2020-10-15 20:21:13,314 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 20:21:13,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:13,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:13,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:13,367 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 20:21:13,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:13,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 20:21:13,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096343995] [2020-10-15 20:21:13,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:13,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:13,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:13,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:13,369 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-15 20:21:13,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:13,575 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-15 20:21:13,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:13,575 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 20:21:13,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:13,576 INFO L225 Difference]: With dead ends: 75 [2020-10-15 20:21:13,576 INFO L226 Difference]: Without dead ends: 69 [2020-10-15 20:21:13,576 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 20:21:13,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-15 20:21:13,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-15 20:21:13,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 20:21:13,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-15 20:21:13,579 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-15 20:21:13,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:13,579 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-15 20:21:13,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:13,579 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-15 20:21:13,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:13,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:13,580 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:13,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:13,788 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:13,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:13,788 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-15 20:21:13,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:13,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673804559] [2020-10-15 20:21:13,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:13,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:13,866 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 20:21:13,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673804559] [2020-10-15 20:21:13,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838778062] [2020-10-15 20:21:13,866 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 20:21:13,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:13,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:13,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:13,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:13,934 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:13,944 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 20:21:13,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:13,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 20:21:13,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032535442] [2020-10-15 20:21:13,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:13,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:13,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:13,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:13,946 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-15 20:21:14,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:14,204 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-15 20:21:14,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:21:14,205 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 20:21:14,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:14,206 INFO L225 Difference]: With dead ends: 79 [2020-10-15 20:21:14,206 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 20:21:14,206 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 20:21:14,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 20:21:14,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-15 20:21:14,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 20:21:14,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-15 20:21:14,209 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-15 20:21:14,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:14,209 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-15 20:21:14,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:14,209 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-15 20:21:14,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:14,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:14,210 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:14,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-15 20:21:14,412 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:14,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:14,412 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-15 20:21:14,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:14,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421003661] [2020-10-15 20:21:14,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:14,516 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 20:21:14,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421003661] [2020-10-15 20:21:14,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351934064] [2020-10-15 20:21:14,517 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 20:21:14,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 20:21:14,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:14,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:14,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:14,622 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 20:21:14,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:14,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 20:21:14,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601296959] [2020-10-15 20:21:14,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:14,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:14,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:14,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:14,626 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-15 20:21:14,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:14,917 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-15 20:21:14,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:21:14,918 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 20:21:14,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:14,918 INFO L225 Difference]: With dead ends: 79 [2020-10-15 20:21:14,918 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 20:21:14,919 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 20:21:14,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 20:21:14,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-15 20:21:14,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-15 20:21:14,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-15 20:21:14,921 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-15 20:21:14,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:14,921 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-15 20:21:14,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:14,922 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-15 20:21:14,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:14,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:14,922 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:15,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:15,123 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:15,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:15,124 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-15 20:21:15,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:15,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801321666] [2020-10-15 20:21:15,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:15,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801321666] [2020-10-15 20:21:15,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694303388] [2020-10-15 20:21:15,239 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 20:21:15,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:15,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:15,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:15,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:15,348 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:15,362 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 20:21:15,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:15,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 20:21:15,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763307406] [2020-10-15 20:21:15,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:15,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:15,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:15,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:15,364 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-15 20:21:15,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:15,764 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-15 20:21:15,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:21:15,765 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 20:21:15,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:15,766 INFO L225 Difference]: With dead ends: 76 [2020-10-15 20:21:15,766 INFO L226 Difference]: Without dead ends: 70 [2020-10-15 20:21:15,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:21:15,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-15 20:21:15,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-15 20:21:15,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 20:21:15,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-15 20:21:15,771 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-15 20:21:15,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:15,771 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-15 20:21:15,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:15,772 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-15 20:21:15,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:15,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:15,772 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:15,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-15 20:21:15,983 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:15,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:15,984 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-15 20:21:15,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:15,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011819938] [2020-10-15 20:21:15,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:15,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:16,078 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 20:21:16,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011819938] [2020-10-15 20:21:16,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457818397] [2020-10-15 20:21:16,079 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 20:21:16,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 20:21:16,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:16,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:16,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:16,178 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 20:21:16,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:16,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 20:21:16,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976973948] [2020-10-15 20:21:16,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:16,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:16,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:16,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:16,180 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-15 20:21:16,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:16,474 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-15 20:21:16,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:21:16,474 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 20:21:16,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:16,475 INFO L225 Difference]: With dead ends: 96 [2020-10-15 20:21:16,475 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 20:21:16,476 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 20:21:16,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 20:21:16,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-15 20:21:16,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 20:21:16,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-15 20:21:16,479 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-15 20:21:16,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:16,479 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-15 20:21:16,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:16,480 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-15 20:21:16,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:16,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:16,480 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:16,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-15 20:21:16,689 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:16,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:16,690 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-15 20:21:16,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:16,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101591979] [2020-10-15 20:21:16,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:16,762 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 20:21:16,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101591979] [2020-10-15 20:21:16,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731173414] [2020-10-15 20:21:16,763 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 20:21:16,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 20:21:16,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:16,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:16,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:16,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:16,839 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 20:21:16,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:16,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 20:21:16,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013452013] [2020-10-15 20:21:16,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:16,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:16,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:16,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:16,841 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-15 20:21:17,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:17,206 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-15 20:21:17,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:21:17,207 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 20:21:17,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:17,208 INFO L225 Difference]: With dead ends: 77 [2020-10-15 20:21:17,208 INFO L226 Difference]: Without dead ends: 69 [2020-10-15 20:21:17,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:21:17,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-15 20:21:17,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-15 20:21:17,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 20:21:17,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-15 20:21:17,212 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-15 20:21:17,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:17,212 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-15 20:21:17,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:17,212 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-15 20:21:17,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:17,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:17,213 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:17,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-15 20:21:17,423 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:17,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:17,423 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-15 20:21:17,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:17,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794502258] [2020-10-15 20:21:17,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:17,514 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 20:21:17,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794502258] [2020-10-15 20:21:17,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489621089] [2020-10-15 20:21:17,515 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 20:21:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:17,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:17,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:17,599 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 20:21:17,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:17,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 20:21:17,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311159071] [2020-10-15 20:21:17,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:17,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:17,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:17,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:17,601 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-15 20:21:17,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:17,794 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-15 20:21:17,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 20:21:17,795 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 20:21:17,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:17,796 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:21:17,796 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 20:21:17,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:21:17,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 20:21:17,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-15 20:21:17,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 20:21:17,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 20:21:17,799 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-15 20:21:17,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:17,799 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 20:21:17,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:17,799 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 20:21:17,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:17,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:17,800 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:18,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-15 20:21:18,008 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:18,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:18,009 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-15 20:21:18,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:18,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048462893] [2020-10-15 20:21:18,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:18,101 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 20:21:18,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048462893] [2020-10-15 20:21:18,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164231555] [2020-10-15 20:21:18,102 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 20:21:18,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:18,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:18,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:18,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:18,171 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:18,181 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 20:21:18,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:18,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 20:21:18,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919731777] [2020-10-15 20:21:18,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:18,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:18,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:18,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:18,183 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-15 20:21:18,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:18,428 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-15 20:21:18,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:21:18,428 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 20:21:18,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:18,429 INFO L225 Difference]: With dead ends: 81 [2020-10-15 20:21:18,429 INFO L226 Difference]: Without dead ends: 75 [2020-10-15 20:21:18,430 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 20:21:18,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-15 20:21:18,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-15 20:21:18,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 20:21:18,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 20:21:18,435 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-15 20:21:18,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:18,435 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 20:21:18,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:18,435 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 20:21:18,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:18,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:18,436 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:18,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-15 20:21:18,642 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:18,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:18,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-15 20:21:18,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:18,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467186237] [2020-10-15 20:21:18,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:18,721 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 20:21:18,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467186237] [2020-10-15 20:21:18,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107415004] [2020-10-15 20:21:18,722 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 20:21:18,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 20:21:18,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:18,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:18,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:18,802 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 20:21:18,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:18,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 20:21:18,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585138288] [2020-10-15 20:21:18,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:18,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:18,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:18,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:18,804 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-15 20:21:19,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:19,034 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-15 20:21:19,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:19,034 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 20:21:19,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:19,035 INFO L225 Difference]: With dead ends: 78 [2020-10-15 20:21:19,035 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 20:21:19,036 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 20:21:19,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 20:21:19,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-15 20:21:19,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 20:21:19,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 20:21:19,038 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-15 20:21:19,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:19,039 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 20:21:19,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:19,039 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 20:21:19,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:19,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:19,040 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:19,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-15 20:21:19,241 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:19,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:19,241 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-15 20:21:19,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:19,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735118897] [2020-10-15 20:21:19,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:19,327 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 20:21:19,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735118897] [2020-10-15 20:21:19,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560748736] [2020-10-15 20:21:19,328 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 20:21:19,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:19,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:19,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:19,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:19,392 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:19,406 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 20:21:19,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:19,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 20:21:19,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683092625] [2020-10-15 20:21:19,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:19,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:19,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:19,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:19,408 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-15 20:21:19,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:19,732 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-15 20:21:19,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:21:19,733 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 20:21:19,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:19,734 INFO L225 Difference]: With dead ends: 77 [2020-10-15 20:21:19,734 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 20:21:19,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:21:19,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 20:21:19,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-15 20:21:19,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 20:21:19,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 20:21:19,737 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-15 20:21:19,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:19,737 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 20:21:19,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:19,737 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 20:21:19,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:19,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:19,738 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:19,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-15 20:21:19,939 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:19,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:19,939 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-15 20:21:19,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:19,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255974836] [2020-10-15 20:21:19,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:20,023 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 20:21:20,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255974836] [2020-10-15 20:21:20,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656369972] [2020-10-15 20:21:20,023 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 20:21:20,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 20:21:20,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:20,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:20,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:20,088 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 20:21:20,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:20,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 20:21:20,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000402061] [2020-10-15 20:21:20,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:20,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:20,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:20,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:20,091 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-15 20:21:20,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:20,366 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-15 20:21:20,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:21:20,367 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 20:21:20,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:20,368 INFO L225 Difference]: With dead ends: 74 [2020-10-15 20:21:20,368 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 20:21:20,368 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 20:21:20,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 20:21:20,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-15 20:21:20,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 20:21:20,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 20:21:20,371 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-15 20:21:20,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:20,371 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 20:21:20,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:20,371 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 20:21:20,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:20,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:20,371 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:20,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:20,572 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:20,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:20,573 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-15 20:21:20,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:20,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652505071] [2020-10-15 20:21:20,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:20,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:20,673 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 20:21:20,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652505071] [2020-10-15 20:21:20,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096278030] [2020-10-15 20:21:20,673 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 20:21:20,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 20:21:20,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:20,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:20,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:20,739 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:20,749 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 20:21:20,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:20,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 20:21:20,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878576001] [2020-10-15 20:21:20,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:20,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:20,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:20,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:20,751 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-15 20:21:21,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:21,115 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-15 20:21:21,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:21:21,119 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 20:21:21,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:21,120 INFO L225 Difference]: With dead ends: 73 [2020-10-15 20:21:21,120 INFO L226 Difference]: Without dead ends: 67 [2020-10-15 20:21:21,121 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 20:21:21,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-15 20:21:21,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-15 20:21:21,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 20:21:21,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 20:21:21,124 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-15 20:21:21,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:21,124 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 20:21:21,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:21,124 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 20:21:21,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:21,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:21,125 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:21,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-15 20:21:21,332 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:21,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:21,333 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-15 20:21:21,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:21,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114338862] [2020-10-15 20:21:21,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:21,405 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 20:21:21,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114338862] [2020-10-15 20:21:21,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194065772] [2020-10-15 20:21:21,406 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 20:21:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:21,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:21,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:21,465 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 20:21:21,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:21,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 20:21:21,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468317542] [2020-10-15 20:21:21,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:21,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:21,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:21,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:21,467 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-15 20:21:21,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:21,780 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-15 20:21:21,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:21:21,780 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 20:21:21,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:21,781 INFO L225 Difference]: With dead ends: 89 [2020-10-15 20:21:21,782 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 20:21:21,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:21:21,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 20:21:21,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-15 20:21:21,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 20:21:21,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-15 20:21:21,787 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-15 20:21:21,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:21,787 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-15 20:21:21,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:21,787 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-15 20:21:21,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:21,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:21,788 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:21,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:21,999 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:21,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:21,999 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-15 20:21:21,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:22,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423722063] [2020-10-15 20:21:22,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:22,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:22,069 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 20:21:22,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423722063] [2020-10-15 20:21:22,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935560296] [2020-10-15 20:21:22,070 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 20:21:22,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:22,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:22,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:22,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:22,187 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 20:21:22,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:22,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 20:21:22,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951554698] [2020-10-15 20:21:22,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:22,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:22,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:22,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:22,189 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-15 20:21:22,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:22,585 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-10-15 20:21:22,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:21:22,586 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 20:21:22,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:22,587 INFO L225 Difference]: With dead ends: 68 [2020-10-15 20:21:22,587 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 20:21:22,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:21:22,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 20:21:22,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-10-15 20:21:22,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-15 20:21:22,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-15 20:21:22,589 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-15 20:21:22,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:22,590 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-15 20:21:22,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:22,592 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-15 20:21:22,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:22,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:22,592 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:22,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-15 20:21:22,799 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:22,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:22,800 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-15 20:21:22,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:22,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359301001] [2020-10-15 20:21:22,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:22,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:22,873 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 20:21:22,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359301001] [2020-10-15 20:21:22,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863948062] [2020-10-15 20:21:22,874 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 20:21:22,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 20:21:22,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:22,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:22,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:22,933 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:22,943 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 20:21:22,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:22,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 20:21:22,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62713102] [2020-10-15 20:21:22,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:22,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:22,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:22,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:22,945 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-15 20:21:23,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:23,356 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-15 20:21:23,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:21:23,357 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 20:21:23,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:23,357 INFO L225 Difference]: With dead ends: 76 [2020-10-15 20:21:23,358 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 20:21:23,358 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 20:21:23,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 20:21:23,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-15 20:21:23,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 20:21:23,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-15 20:21:23,362 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-15 20:21:23,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:23,362 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-15 20:21:23,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:23,362 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-15 20:21:23,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:23,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:23,363 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:23,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:23,571 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:23,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:23,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-15 20:21:23,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:23,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133753118] [2020-10-15 20:21:23,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:23,651 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 20:21:23,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133753118] [2020-10-15 20:21:23,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810429843] [2020-10-15 20:21:23,652 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 20:21:23,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:23,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:23,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:23,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:23,733 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:23,742 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 20:21:23,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:23,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:21:23,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945713937] [2020-10-15 20:21:23,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:23,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:23,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:23,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:23,744 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-15 20:21:24,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:24,147 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-15 20:21:24,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:21:24,148 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:21:24,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:24,149 INFO L225 Difference]: With dead ends: 66 [2020-10-15 20:21:24,149 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 20:21:24,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:21:24,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 20:21:24,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-15 20:21:24,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:21:24,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-15 20:21:24,152 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-15 20:21:24,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:24,152 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-15 20:21:24,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:24,153 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-15 20:21:24,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:24,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:24,153 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:24,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-15 20:21:24,355 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:24,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:24,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-15 20:21:24,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:24,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191541064] [2020-10-15 20:21:24,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:24,453 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 20:21:24,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191541064] [2020-10-15 20:21:24,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167731957] [2020-10-15 20:21:24,454 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 20:21:24,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 20:21:24,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:24,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:24,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:24,550 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 20:21:24,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:24,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 20:21:24,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627361305] [2020-10-15 20:21:24,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:24,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:24,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:24,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:24,553 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-15 20:21:24,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:24,716 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-15 20:21:24,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 20:21:24,716 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 20:21:24,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:24,717 INFO L225 Difference]: With dead ends: 72 [2020-10-15 20:21:24,717 INFO L226 Difference]: Without dead ends: 66 [2020-10-15 20:21:24,718 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 20:21:24,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-15 20:21:24,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-15 20:21:24,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 20:21:24,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-15 20:21:24,721 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-15 20:21:24,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:24,721 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-15 20:21:24,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:24,721 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-15 20:21:24,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:24,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:24,722 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:24,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-15 20:21:24,931 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:24,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:24,931 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-15 20:21:24,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:24,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760737447] [2020-10-15 20:21:24,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:24,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:25,075 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 20:21:25,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760737447] [2020-10-15 20:21:25,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446342717] [2020-10-15 20:21:25,076 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 20:21:25,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 20:21:25,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:25,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:25,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:25,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:25,195 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 20:21:25,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:25,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:21:25,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213815879] [2020-10-15 20:21:25,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:25,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:25,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:25,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:25,197 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-15 20:21:25,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:25,491 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-15 20:21:25,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:21:25,492 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:21:25,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:25,493 INFO L225 Difference]: With dead ends: 82 [2020-10-15 20:21:25,493 INFO L226 Difference]: Without dead ends: 76 [2020-10-15 20:21:25,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:21:25,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-15 20:21:25,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-15 20:21:25,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 20:21:25,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-15 20:21:25,497 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-15 20:21:25,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:25,497 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-15 20:21:25,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:25,498 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-15 20:21:25,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:25,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:25,498 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:25,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-15 20:21:25,707 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:25,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:25,708 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-15 20:21:25,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:25,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460792077] [2020-10-15 20:21:25,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:25,818 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 20:21:25,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460792077] [2020-10-15 20:21:25,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597278806] [2020-10-15 20:21:25,818 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 20:21:25,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:25,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:25,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:25,871 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 20:21:25,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:25,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 20:21:25,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777070750] [2020-10-15 20:21:25,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:25,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:25,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:25,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:25,873 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-15 20:21:26,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:26,132 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-15 20:21:26,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:21:26,133 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 20:21:26,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:26,134 INFO L225 Difference]: With dead ends: 83 [2020-10-15 20:21:26,134 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 20:21:26,135 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 20:21:26,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 20:21:26,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-15 20:21:26,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 20:21:26,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-15 20:21:26,138 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-15 20:21:26,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:26,138 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-15 20:21:26,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:26,138 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-15 20:21:26,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:26,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:26,139 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:26,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-15 20:21:26,347 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:26,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:26,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-15 20:21:26,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:26,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170734107] [2020-10-15 20:21:26,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:26,469 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 20:21:26,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170734107] [2020-10-15 20:21:26,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426957504] [2020-10-15 20:21:26,470 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 20:21:26,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:26,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:26,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:26,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:26,528 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:26,543 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 20:21:26,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:26,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:21:26,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447317595] [2020-10-15 20:21:26,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:26,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:26,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:26,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:26,545 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-15 20:21:26,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:26,841 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-15 20:21:26,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:21:26,845 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:21:26,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:26,845 INFO L225 Difference]: With dead ends: 89 [2020-10-15 20:21:26,845 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 20:21:26,846 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 20:21:26,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 20:21:26,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-15 20:21:26,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 20:21:26,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-15 20:21:26,847 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-15 20:21:26,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:26,848 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-15 20:21:26,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:26,848 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-15 20:21:26,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:26,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:26,848 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:27,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:27,057 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:27,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:27,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-15 20:21:27,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:27,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073096419] [2020-10-15 20:21:27,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:27,150 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 20:21:27,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073096419] [2020-10-15 20:21:27,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296301595] [2020-10-15 20:21:27,151 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 20:21:27,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 20:21:27,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:27,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:27,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:27,213 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 20:21:27,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:27,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 20:21:27,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693177546] [2020-10-15 20:21:27,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:27,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:27,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:27,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:27,215 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-15 20:21:27,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:27,503 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-15 20:21:27,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:21:27,503 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 20:21:27,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:27,504 INFO L225 Difference]: With dead ends: 89 [2020-10-15 20:21:27,505 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 20:21:27,505 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 20:21:27,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 20:21:27,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-15 20:21:27,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 20:21:27,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 20:21:27,510 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-15 20:21:27,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:27,510 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 20:21:27,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:27,510 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 20:21:27,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:27,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:27,511 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:27,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:27,720 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:27,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:27,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-15 20:21:27,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:27,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715795030] [2020-10-15 20:21:27,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:27,813 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 20:21:27,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715795030] [2020-10-15 20:21:27,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731609758] [2020-10-15 20:21:27,814 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 20:21:27,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:27,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:27,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:27,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:27,911 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:27,922 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 20:21:27,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:27,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:21:27,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274539167] [2020-10-15 20:21:27,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:27,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:27,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:27,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:27,924 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-15 20:21:28,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:28,393 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-15 20:21:28,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:21:28,394 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:21:28,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:28,395 INFO L225 Difference]: With dead ends: 86 [2020-10-15 20:21:28,395 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 20:21:28,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:21:28,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 20:21:28,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-15 20:21:28,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 20:21:28,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 20:21:28,398 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-15 20:21:28,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:28,398 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 20:21:28,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:28,398 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 20:21:28,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:28,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:28,399 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:28,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-15 20:21:28,607 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:28,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:28,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-15 20:21:28,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:28,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684462447] [2020-10-15 20:21:28,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:28,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:28,704 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 20:21:28,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684462447] [2020-10-15 20:21:28,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930785813] [2020-10-15 20:21:28,705 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 20:21:28,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 20:21:28,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:28,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:28,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:28,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:28,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:28,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 20:21:28,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049915672] [2020-10-15 20:21:28,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:28,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:28,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:28,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:28,799 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-15 20:21:29,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:29,126 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-15 20:21:29,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:21:29,127 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 20:21:29,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:29,128 INFO L225 Difference]: With dead ends: 87 [2020-10-15 20:21:29,128 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 20:21:29,129 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 20:21:29,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 20:21:29,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-15 20:21:29,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-15 20:21:29,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-15 20:21:29,132 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-15 20:21:29,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:29,133 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-15 20:21:29,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:29,133 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-15 20:21:29,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:29,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:29,133 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:29,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:29,339 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:29,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:29,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-15 20:21:29,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:29,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024311837] [2020-10-15 20:21:29,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:29,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024311837] [2020-10-15 20:21:29,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924583841] [2020-10-15 20:21:29,435 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 20:21:29,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 20:21:29,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:29,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:29,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:29,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:29,538 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 20:21:29,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:29,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:21:29,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317263470] [2020-10-15 20:21:29,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:29,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:29,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:29,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:29,540 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-15 20:21:29,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:29,973 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-15 20:21:29,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:21:29,974 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:21:29,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:29,975 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:21:29,975 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 20:21:29,975 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 20:21:29,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 20:21:29,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-15 20:21:29,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 20:21:29,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-15 20:21:29,979 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-15 20:21:29,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:29,979 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-15 20:21:29,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:29,979 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-15 20:21:29,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:29,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:29,980 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:30,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-15 20:21:30,189 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:30,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:30,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-15 20:21:30,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:30,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566502749] [2020-10-15 20:21:30,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:30,279 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 20:21:30,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566502749] [2020-10-15 20:21:30,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775188098] [2020-10-15 20:21:30,280 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 20:21:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:30,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:30,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:30,357 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 20:21:30,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:30,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 20:21:30,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207041909] [2020-10-15 20:21:30,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:30,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:30,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:30,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:30,359 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-15 20:21:30,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:30,731 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-15 20:21:30,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:21:30,732 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 20:21:30,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:30,732 INFO L225 Difference]: With dead ends: 104 [2020-10-15 20:21:30,733 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 20:21:30,733 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 20:21:30,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 20:21:30,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-15 20:21:30,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 20:21:30,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-15 20:21:30,735 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-15 20:21:30,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:30,735 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-15 20:21:30,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:30,736 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-15 20:21:30,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:30,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:30,736 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:30,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-15 20:21:30,945 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:30,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:30,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-15 20:21:30,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:30,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875608142] [2020-10-15 20:21:30,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:31,022 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 20:21:31,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875608142] [2020-10-15 20:21:31,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38619391] [2020-10-15 20:21:31,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:21:31,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:31,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:31,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:31,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:31,092 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:31,103 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 20:21:31,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:31,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:21:31,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250443318] [2020-10-15 20:21:31,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:31,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:31,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:31,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:31,104 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-15 20:21:31,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:31,579 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-15 20:21:31,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:21:31,580 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:21:31,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:31,581 INFO L225 Difference]: With dead ends: 85 [2020-10-15 20:21:31,581 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 20:21:31,581 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 20:21:31,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 20:21:31,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-15 20:21:31,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 20:21:31,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-15 20:21:31,583 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-15 20:21:31,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:31,584 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-15 20:21:31,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:31,584 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-15 20:21:31,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:31,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:31,584 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:31,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-15 20:21:31,792 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:31,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:31,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-15 20:21:31,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:31,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884033924] [2020-10-15 20:21:31,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:31,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:31,960 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 20:21:31,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884033924] [2020-10-15 20:21:31,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459571668] [2020-10-15 20:21:31,961 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 20:21:32,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 20:21:32,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:32,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:32,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:32,030 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 20:21:32,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:32,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 20:21:32,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778845991] [2020-10-15 20:21:32,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:32,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:32,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:32,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:32,032 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-15 20:21:32,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:32,240 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-15 20:21:32,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:32,241 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 20:21:32,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:32,242 INFO L225 Difference]: With dead ends: 94 [2020-10-15 20:21:32,242 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 20:21:32,243 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 20:21:32,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 20:21:32,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-10-15 20:21:32,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:21:32,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 20:21:32,245 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 20:21:32,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:32,246 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 20:21:32,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:32,246 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 20:21:32,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:32,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:32,247 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:32,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-15 20:21:32,455 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:32,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:32,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-10-15 20:21:32,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:32,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171805223] [2020-10-15 20:21:32,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:32,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:32,600 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 20:21:32,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171805223] [2020-10-15 20:21:32,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415924191] [2020-10-15 20:21:32,601 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 20:21:32,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:32,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:32,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:32,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:32,660 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:32,670 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 20:21:32,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:32,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:21:32,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124589313] [2020-10-15 20:21:32,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:32,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:32,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:32,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:32,672 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 20:21:32,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:32,957 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-10-15 20:21:32,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:21:32,958 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:21:32,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:32,959 INFO L225 Difference]: With dead ends: 91 [2020-10-15 20:21:32,959 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 20:21:32,960 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 20:21:32,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 20:21:32,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-15 20:21:32,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:21:32,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 20:21:32,962 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 20:21:32,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:32,962 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 20:21:32,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:32,962 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 20:21:32,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:32,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:32,963 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:33,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-15 20:21:33,165 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:33,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:33,165 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-10-15 20:21:33,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:33,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649993852] [2020-10-15 20:21:33,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:33,266 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 20:21:33,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649993852] [2020-10-15 20:21:33,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466846709] [2020-10-15 20:21:33,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:21:33,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 20:21:33,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:33,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:33,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:33,329 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 20:21:33,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:33,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 20:21:33,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909521346] [2020-10-15 20:21:33,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:33,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:33,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:33,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:33,331 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 20:21:33,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:33,592 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-15 20:21:33,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:21:33,593 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 20:21:33,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:33,594 INFO L225 Difference]: With dead ends: 88 [2020-10-15 20:21:33,594 INFO L226 Difference]: Without dead ends: 82 [2020-10-15 20:21:33,594 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 20:21:33,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-15 20:21:33,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-10-15 20:21:33,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:21:33,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 20:21:33,597 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 20:21:33,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:33,597 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 20:21:33,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:33,598 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 20:21:33,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:33,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:33,598 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:33,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:33,807 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:33,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:33,807 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-10-15 20:21:33,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:33,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614125230] [2020-10-15 20:21:33,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:33,908 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 20:21:33,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614125230] [2020-10-15 20:21:33,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933349379] [2020-10-15 20:21:33,909 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 20:21:33,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 20:21:33,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:33,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:33,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:34,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:34,021 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 20:21:34,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:34,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:21:34,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017526276] [2020-10-15 20:21:34,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:34,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:34,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:34,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:34,023 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 20:21:34,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:34,395 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-10-15 20:21:34,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:21:34,396 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:21:34,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:34,397 INFO L225 Difference]: With dead ends: 87 [2020-10-15 20:21:34,397 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 20:21:34,397 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 20:21:34,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 20:21:34,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-15 20:21:34,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:21:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 20:21:34,400 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 20:21:34,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:34,400 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 20:21:34,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:34,400 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 20:21:34,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:34,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:34,400 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:34,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:34,601 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:34,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:34,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-10-15 20:21:34,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:34,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101315413] [2020-10-15 20:21:34,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:34,707 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 20:21:34,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101315413] [2020-10-15 20:21:34,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435022406] [2020-10-15 20:21:34,708 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 20:21:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:34,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:34,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:34,775 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 20:21:34,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:34,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 20:21:34,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629817418] [2020-10-15 20:21:34,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:34,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:34,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:34,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:34,777 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 20:21:35,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:35,100 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-15 20:21:35,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:21:35,101 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 20:21:35,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:35,102 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:21:35,102 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 20:21:35,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:21:35,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 20:21:35,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-15 20:21:35,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:21:35,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 20:21:35,105 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 20:21:35,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:35,105 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 20:21:35,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:35,105 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 20:21:35,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:35,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:35,105 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:35,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-15 20:21:35,307 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:35,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:35,308 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-10-15 20:21:35,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:35,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699449533] [2020-10-15 20:21:35,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:35,427 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 20:21:35,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699449533] [2020-10-15 20:21:35,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372569948] [2020-10-15 20:21:35,428 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 20:21:35,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:35,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:35,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:35,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:35,506 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:35,516 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 20:21:35,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:35,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:21:35,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757280458] [2020-10-15 20:21:35,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:35,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:35,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:35,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:35,518 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 20:21:35,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:35,977 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-15 20:21:35,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:21:35,978 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:21:35,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:35,979 INFO L225 Difference]: With dead ends: 83 [2020-10-15 20:21:35,979 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 20:21:35,979 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 20:21:35,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 20:21:35,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-15 20:21:35,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:21:35,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 20:21:35,982 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 20:21:35,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:35,983 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 20:21:35,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:35,983 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 20:21:35,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:35,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:35,983 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:36,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:36,188 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:36,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:36,188 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-10-15 20:21:36,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:36,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416266237] [2020-10-15 20:21:36,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:36,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416266237] [2020-10-15 20:21:36,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840674531] [2020-10-15 20:21:36,295 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 20:21:36,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 20:21:36,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:36,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:36,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:36,358 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 20:21:36,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:36,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 20:21:36,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056011020] [2020-10-15 20:21:36,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:36,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:36,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:36,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:36,360 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 20:21:36,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:36,737 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-15 20:21:36,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:21:36,738 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 20:21:36,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:36,738 INFO L225 Difference]: With dead ends: 80 [2020-10-15 20:21:36,739 INFO L226 Difference]: Without dead ends: 74 [2020-10-15 20:21:36,739 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 20:21:36,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-15 20:21:36,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-15 20:21:36,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:21:36,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 20:21:36,742 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 20:21:36,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:36,742 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 20:21:36,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:36,742 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 20:21:36,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:36,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:36,743 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:36,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-15 20:21:36,948 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:36,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:36,948 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-10-15 20:21:36,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:36,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645935716] [2020-10-15 20:21:36,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:36,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:37,046 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 20:21:37,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645935716] [2020-10-15 20:21:37,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949335916] [2020-10-15 20:21:37,047 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 20:21:37,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:37,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:37,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:37,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:37,122 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:37,132 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 20:21:37,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:37,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:21:37,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865645776] [2020-10-15 20:21:37,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:37,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:37,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:37,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:37,134 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 20:21:37,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:37,657 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-10-15 20:21:37,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:21:37,658 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:21:37,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:37,659 INFO L225 Difference]: With dead ends: 79 [2020-10-15 20:21:37,659 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 20:21:37,659 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 20:21:37,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 20:21:37,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-15 20:21:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:21:37,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 20:21:37,662 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 20:21:37,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:37,662 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 20:21:37,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:37,663 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 20:21:37,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:37,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:37,663 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:37,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:37,864 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:37,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:37,864 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-10-15 20:21:37,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:37,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102577910] [2020-10-15 20:21:37,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:37,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:37,958 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 20:21:37,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102577910] [2020-10-15 20:21:37,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171768239] [2020-10-15 20:21:37,959 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 20:21:38,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 20:21:38,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:38,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:38,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:38,026 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 20:21:38,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:38,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 20:21:38,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972541167] [2020-10-15 20:21:38,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:38,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:38,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:38,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:38,027 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 20:21:38,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:38,453 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-15 20:21:38,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:21:38,454 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 20:21:38,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:38,455 INFO L225 Difference]: With dead ends: 95 [2020-10-15 20:21:38,455 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 20:21:38,456 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 20:21:38,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 20:21:38,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-10-15 20:21:38,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 20:21:38,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-10-15 20:21:38,458 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-10-15 20:21:38,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:38,458 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-10-15 20:21:38,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:38,458 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-10-15 20:21:38,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:38,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:38,459 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:38,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-15 20:21:38,659 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:38,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:38,660 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-10-15 20:21:38,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:38,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752337073] [2020-10-15 20:21:38,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:38,760 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:38,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752337073] [2020-10-15 20:21:38,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755608995] [2020-10-15 20:21:38,761 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 20:21:38,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 20:21:38,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:38,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:38,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:38,836 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:38,848 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 20:21:38,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:38,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:21:38,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721732849] [2020-10-15 20:21:38,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:38,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:38,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:38,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:38,850 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-10-15 20:21:39,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:39,413 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-10-15 20:21:39,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:21:39,414 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:21:39,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:39,414 INFO L225 Difference]: With dead ends: 76 [2020-10-15 20:21:39,415 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 20:21:39,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:21:39,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 20:21:39,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-10-15 20:21:39,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-15 20:21:39,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-10-15 20:21:39,417 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-10-15 20:21:39,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:39,418 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-10-15 20:21:39,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:39,418 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-10-15 20:21:39,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:39,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:39,418 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:39,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:39,619 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:39,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:39,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-10-15 20:21:39,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:39,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995125842] [2020-10-15 20:21:39,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:39,712 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 20:21:39,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995125842] [2020-10-15 20:21:39,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918898282] [2020-10-15 20:21:39,712 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 20:21:39,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:39,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:39,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:39,795 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:39,808 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 20:21:39,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:39,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:21:39,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879652414] [2020-10-15 20:21:39,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:39,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:39,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:39,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:39,810 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-10-15 20:21:40,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:40,315 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-10-15 20:21:40,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:21:40,315 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:21:40,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:40,316 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:21:40,316 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 20:21:40,317 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 20:21:40,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 20:21:40,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-15 20:21:40,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 20:21:40,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-15 20:21:40,319 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-10-15 20:21:40,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:40,319 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-15 20:21:40,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:40,319 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-15 20:21:40,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:40,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:40,320 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:40,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-15 20:21:40,521 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:40,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:40,522 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-10-15 20:21:40,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:40,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116342030] [2020-10-15 20:21:40,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:40,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:40,604 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:40,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116342030] [2020-10-15 20:21:40,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580611625] [2020-10-15 20:21:40,605 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 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 20:21:40,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:40,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:40,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 20:21:40,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:40,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-15 20:21:40,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2020-10-15 20:21:40,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110417514] [2020-10-15 20:21:40,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 20:21:40,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:40,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 20:21:40,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:40,683 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 8 states. [2020-10-15 20:21:40,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:40,698 INFO L93 Difference]: Finished difference Result 151 states and 338 transitions. [2020-10-15 20:21:40,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 20:21:40,698 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-15 20:21:40,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:40,699 INFO L225 Difference]: With dead ends: 151 [2020-10-15 20:21:40,699 INFO L226 Difference]: Without dead ends: 50 [2020-10-15 20:21:40,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:40,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-15 20:21:40,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-15 20:21:40,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 20:21:40,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 100 transitions. [2020-10-15 20:21:40,702 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 100 transitions. Word has length 19 [2020-10-15 20:21:40,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:40,703 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 100 transitions. [2020-10-15 20:21:40,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 20:21:40,703 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 100 transitions. [2020-10-15 20:21:40,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:40,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:40,703 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:40,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-15 20:21:40,912 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:40,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:40,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-10-15 20:21:40,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:40,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366286014] [2020-10-15 20:21:40,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:40,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:41,063 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 20:21:41,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366286014] [2020-10-15 20:21:41,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615922597] [2020-10-15 20:21:41,063 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 20:21:41,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 20:21:41,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:41,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 20:21:41,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:41,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:41,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-15 20:21:41,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 21 [2020-10-15 20:21:41,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310151835] [2020-10-15 20:21:41,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 20:21:41,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:41,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 20:21:41,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:21:41,200 INFO L87 Difference]: Start difference. First operand 50 states and 100 transitions. Second operand 8 states. [2020-10-15 20:21:41,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:41,215 INFO L93 Difference]: Finished difference Result 86 states and 150 transitions. [2020-10-15 20:21:41,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 20:21:41,218 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-15 20:21:41,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:41,218 INFO L225 Difference]: With dead ends: 86 [2020-10-15 20:21:41,218 INFO L226 Difference]: Without dead ends: 0 [2020-10-15 20:21:41,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:21:41,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-15 20:21:41,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-15 20:21:41,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-15 20:21:41,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-15 20:21:41,219 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-10-15 20:21:41,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:41,220 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-15 20:21:41,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 20:21:41,220 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-15 20:21:41,220 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-15 20:21:41,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:41,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:21:41 BasicIcfg [2020-10-15 20:21:41,425 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 20:21:41,427 INFO L168 Benchmark]: Toolchain (without parser) took 46936.68 ms. Allocated memory was 251.1 MB in the beginning and 608.7 MB in the end (delta: 357.6 MB). Free memory was 206.9 MB in the beginning and 231.5 MB in the end (delta: -24.6 MB). Peak memory consumption was 333.0 MB. Max. memory is 14.2 GB. [2020-10-15 20:21:41,427 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 251.1 MB. Free memory is still 227.5 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 20:21:41,428 INFO L168 Benchmark]: CACSL2BoogieTranslator took 642.87 ms. Allocated memory was 251.1 MB in the beginning and 314.6 MB in the end (delta: 63.4 MB). Free memory was 206.9 MB in the beginning and 270.2 MB in the end (delta: -63.3 MB). Peak memory consumption was 29.4 MB. Max. memory is 14.2 GB. [2020-10-15 20:21:41,428 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.25 ms. Allocated memory is still 314.6 MB. Free memory was 270.2 MB in the beginning and 267.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 20:21:41,429 INFO L168 Benchmark]: Boogie Preprocessor took 27.55 ms. Allocated memory is still 314.6 MB. Free memory was 267.7 MB in the beginning and 265.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 20:21:41,429 INFO L168 Benchmark]: RCFGBuilder took 453.56 ms. Allocated memory is still 314.6 MB. Free memory was 265.2 MB in the beginning and 245.8 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. [2020-10-15 20:21:41,429 INFO L168 Benchmark]: TraceAbstraction took 45732.82 ms. Allocated memory was 314.6 MB in the beginning and 608.7 MB in the end (delta: 294.1 MB). Free memory was 245.8 MB in the beginning and 231.5 MB in the end (delta: 14.4 MB). Peak memory consumption was 308.5 MB. Max. memory is 14.2 GB. [2020-10-15 20:21:41,431 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 251.1 MB. Free memory is still 227.5 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 642.87 ms. Allocated memory was 251.1 MB in the beginning and 314.6 MB in the end (delta: 63.4 MB). Free memory was 206.9 MB in the beginning and 270.2 MB in the end (delta: -63.3 MB). Peak memory consumption was 29.4 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 74.25 ms. Allocated memory is still 314.6 MB. Free memory was 270.2 MB in the beginning and 267.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 27.55 ms. Allocated memory is still 314.6 MB. Free memory was 267.7 MB in the beginning and 265.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 453.56 ms. Allocated memory is still 314.6 MB. Free memory was 265.2 MB in the beginning and 245.8 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. * TraceAbstraction took 45732.82 ms. Allocated memory was 314.6 MB in the beginning and 608.7 MB in the end (delta: 294.1 MB). Free memory was 245.8 MB in the beginning and 231.5 MB in the end (delta: 14.4 MB). Peak memory consumption was 308.5 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: 1.2s, 57 PlacesBefore, 20 PlacesAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 45 TotalNumberOfCompositions, 911 MoverChecksTotal - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 45.6s, OverallIterations: 71, TraceHistogramMax: 6, AutomataDifference: 18.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 1144 SDtfs, 3049 SDslu, 4501 SDs, 0 SdLazy, 4778 SolverSat, 2192 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2335 GetRequests, 834 SyntacticMatches, 64 SemanticMatches, 1437 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6964 ImplicationChecksByTransitivity, 17.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 71 MinimizatonAttempts, 1147 StatesRemovedByMinimization, 68 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 7.4s InterpolantComputationTime, 2056 NumberOfCodeBlocks, 2056 NumberOfCodeBlocksAsserted, 254 NumberOfCheckSat, 1919 ConstructedInterpolants, 0 QuantifiedInterpolants, 118755 SizeOfPredicates, 456 NumberOfNonLiveVariables, 6614 ConjunctsInSsa, 728 ConjunctsInUnsatCore, 137 InterpolantComputations, 7 PerfectInterpolantSequences, 62/1440 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 proved your program to be correct! Received shutdown request...