/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-1d1d2b5 [2020-10-21 21:34:02,059 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-21 21:34:02,062 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-21 21:34:02,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-21 21:34:02,103 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-21 21:34:02,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-21 21:34:02,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-21 21:34:02,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-21 21:34:02,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-21 21:34:02,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-21 21:34:02,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-21 21:34:02,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-21 21:34:02,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-21 21:34:02,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-21 21:34:02,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-21 21:34:02,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-21 21:34:02,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-21 21:34:02,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-21 21:34:02,137 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-21 21:34:02,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-21 21:34:02,146 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-21 21:34:02,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-21 21:34:02,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-21 21:34:02,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-21 21:34:02,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-21 21:34:02,161 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-21 21:34:02,162 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-21 21:34:02,162 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-21 21:34:02,163 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-21 21:34:02,164 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-21 21:34:02,164 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-21 21:34:02,164 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-21 21:34:02,165 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-21 21:34:02,166 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-21 21:34:02,167 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-21 21:34:02,167 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-21 21:34:02,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-21 21:34:02,168 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-21 21:34:02,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-21 21:34:02,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-21 21:34:02,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-21 21:34:02,170 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-21 21:34:02,191 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-21 21:34:02,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-21 21:34:02,192 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-21 21:34:02,193 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-21 21:34:02,193 INFO L138 SettingsManager]: * Use SBE=true [2020-10-21 21:34:02,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-21 21:34:02,193 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-21 21:34:02,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-21 21:34:02,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-21 21:34:02,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-21 21:34:02,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-21 21:34:02,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-21 21:34:02,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-21 21:34:02,195 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-21 21:34:02,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-21 21:34:02,195 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-21 21:34:02,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-21 21:34:02,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-21 21:34:02,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-21 21:34:02,196 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-21 21:34:02,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-21 21:34:02,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-21 21:34:02,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-21 21:34:02,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-21 21:34:02,197 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-21 21:34:02,197 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-21 21:34:02,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-21 21:34:02,198 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-21 21:34:02,198 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-21 21:34:02,198 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-21 21:34:02,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-21 21:34:02,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-21 21:34:02,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-21 21:34:02,521 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-21 21:34:02,522 INFO L275 PluginConnector]: CDTParser initialized [2020-10-21 21:34:02,522 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-10-21 21:34:02,595 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e1087fe5/9ffe80d7f87d4d44bf9aec4b17089192/FLAGca0a70c10 [2020-10-21 21:34:03,080 INFO L306 CDTParser]: Found 1 translation units. [2020-10-21 21:34:03,080 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-10-21 21:34:03,099 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e1087fe5/9ffe80d7f87d4d44bf9aec4b17089192/FLAGca0a70c10 [2020-10-21 21:34:03,387 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e1087fe5/9ffe80d7f87d4d44bf9aec4b17089192 [2020-10-21 21:34:03,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-21 21:34:03,400 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-21 21:34:03,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-21 21:34:03,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-21 21:34:03,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-21 21:34:03,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 09:34:03" (1/1) ... [2020-10-21 21:34:03,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@420dc8b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:03, skipping insertion in model container [2020-10-21 21:34:03,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 09:34:03" (1/1) ... [2020-10-21 21:34:03,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-21 21:34:03,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-21 21:34:03,967 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 21:34:03,979 INFO L203 MainTranslator]: Completed pre-run [2020-10-21 21:34:04,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 21:34:04,148 INFO L208 MainTranslator]: Completed translation [2020-10-21 21:34:04,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:04 WrapperNode [2020-10-21 21:34:04,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-21 21:34:04,151 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-21 21:34:04,151 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-21 21:34:04,151 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-21 21:34:04,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:04" (1/1) ... [2020-10-21 21:34:04,174 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:04" (1/1) ... [2020-10-21 21:34:04,195 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-21 21:34:04,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-21 21:34:04,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-21 21:34:04,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-21 21:34:04,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:04" (1/1) ... [2020-10-21 21:34:04,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:04" (1/1) ... [2020-10-21 21:34:04,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:04" (1/1) ... [2020-10-21 21:34:04,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:04" (1/1) ... [2020-10-21 21:34:04,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:04" (1/1) ... [2020-10-21 21:34:04,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:04" (1/1) ... [2020-10-21 21:34:04,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:04" (1/1) ... [2020-10-21 21:34:04,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-21 21:34:04,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-21 21:34:04,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-21 21:34:04,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-21 21:34:04,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:04" (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 [2020-10-21 21:34:04,291 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-21 21:34:04,291 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-21 21:34:04,291 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-21 21:34:04,292 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-21 21:34:04,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-21 21:34:04,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-21 21:34:04,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-21 21:34:04,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-21 21:34:04,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-21 21:34:04,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-21 21:34:04,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-21 21:34:04,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-21 21:34:04,295 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-21 21:34:04,660 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-21 21:34:04,660 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-21 21:34:04,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 09:34:04 BoogieIcfgContainer [2020-10-21 21:34:04,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-21 21:34:04,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-21 21:34:04,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-21 21:34:04,668 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-21 21:34:04,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 09:34:03" (1/3) ... [2020-10-21 21:34:04,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a0e0e62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 09:34:04, skipping insertion in model container [2020-10-21 21:34:04,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:04" (2/3) ... [2020-10-21 21:34:04,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a0e0e62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 09:34:04, skipping insertion in model container [2020-10-21 21:34:04,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 09:34:04" (3/3) ... [2020-10-21 21:34:04,672 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-10-21 21:34:04,683 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-21 21:34:04,684 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-21 21:34:04,691 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-21 21:34:04,692 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-21 21:34:04,718 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,718 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,719 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,719 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,720 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,720 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,720 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,721 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,721 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,721 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,721 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,722 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,722 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,722 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,723 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,723 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,723 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,723 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,724 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,724 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,724 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,725 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,725 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,726 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,726 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,726 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,726 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,727 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,730 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,730 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,731 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,731 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,731 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,731 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,738 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,738 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,738 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,738 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,739 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,739 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:04,741 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-21 21:34:04,754 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-21 21:34:04,771 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-21 21:34:04,771 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-21 21:34:04,772 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-21 21:34:04,772 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-21 21:34:04,772 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-21 21:34:04,772 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-21 21:34:04,772 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-21 21:34:04,772 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-21 21:34:04,783 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-21 21:34:04,786 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-10-21 21:34:04,789 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-10-21 21:34:04,791 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-10-21 21:34:04,832 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-10-21 21:34:04,832 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-21 21:34:04,838 INFO L80 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 6/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 97 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-10-21 21:34:04,840 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-10-21 21:34:06,111 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-21 21:34:06,557 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-21 21:34:06,681 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-21 21:34:06,734 INFO L131 LiptonReduction]: Checked pairs total: 1187 [2020-10-21 21:34:06,735 INFO L133 LiptonReduction]: Total number of compositions: 62 [2020-10-21 21:34:06,741 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-21 21:34:06,753 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-21 21:34:06,755 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-21 21:34:06,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-21 21:34:06,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:06,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-21 21:34:06,762 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:06,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:06,768 INFO L82 PathProgramCache]: Analyzing trace with hash -805875314, now seen corresponding path program 1 times [2020-10-21 21:34:06,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:06,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529126148] [2020-10-21 21:34:06,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:06,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:06,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529126148] [2020-10-21 21:34:06,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:34:06,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-21 21:34:06,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185583893] [2020-10-21 21:34:06,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-21 21:34:06,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:07,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-21 21:34:07,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-21 21:34:07,008 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-21 21:34:07,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:07,099 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-21 21:34:07,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-21 21:34:07,101 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-21 21:34:07,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:07,112 INFO L225 Difference]: With dead ends: 75 [2020-10-21 21:34:07,113 INFO L226 Difference]: Without dead ends: 42 [2020-10-21 21:34:07,114 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 [2020-10-21 21:34:07,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-21 21:34:07,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-21 21:34:07,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-21 21:34:07,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-21 21:34:07,154 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-21 21:34:07,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:07,155 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-21 21:34:07,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-21 21:34:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-21 21:34:07,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-21 21:34:07,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:07,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:07,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-21 21:34:07,157 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:07,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:07,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1351909113, now seen corresponding path program 1 times [2020-10-21 21:34:07,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:07,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65102267] [2020-10-21 21:34:07,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:07,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65102267] [2020-10-21 21:34:07,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:34:07,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-21 21:34:07,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607231419] [2020-10-21 21:34:07,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-21 21:34:07,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:07,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-21 21:34:07,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-21 21:34:07,242 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-21 21:34:07,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:07,272 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-21 21:34:07,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-21 21:34:07,273 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-21 21:34:07,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:07,274 INFO L225 Difference]: With dead ends: 56 [2020-10-21 21:34:07,275 INFO L226 Difference]: Without dead ends: 50 [2020-10-21 21:34:07,275 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 [2020-10-21 21:34:07,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-21 21:34:07,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-21 21:34:07,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-21 21:34:07,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-21 21:34:07,284 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-21 21:34:07,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:07,285 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-21 21:34:07,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-21 21:34:07,285 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-21 21:34:07,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 21:34:07,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:07,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:07,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-21 21:34:07,286 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:07,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:07,287 INFO L82 PathProgramCache]: Analyzing trace with hash 2021583950, now seen corresponding path program 1 times [2020-10-21 21:34:07,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:07,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293153177] [2020-10-21 21:34:07,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:07,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:07,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293153177] [2020-10-21 21:34:07,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:34:07,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 21:34:07,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168949179] [2020-10-21 21:34:07,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 21:34:07,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:07,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 21:34:07,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-21 21:34:07,380 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-21 21:34:07,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:07,456 INFO L93 Difference]: Finished difference Result 54 states and 124 transitions. [2020-10-21 21:34:07,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 21:34:07,457 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 21:34:07,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:07,458 INFO L225 Difference]: With dead ends: 54 [2020-10-21 21:34:07,458 INFO L226 Difference]: Without dead ends: 47 [2020-10-21 21:34:07,459 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 [2020-10-21 21:34:07,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-21 21:34:07,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-21 21:34:07,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-21 21:34:07,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 106 transitions. [2020-10-21 21:34:07,466 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 106 transitions. Word has length 10 [2020-10-21 21:34:07,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:07,466 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 106 transitions. [2020-10-21 21:34:07,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 21:34:07,466 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 106 transitions. [2020-10-21 21:34:07,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 21:34:07,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:07,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:07,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-21 21:34:07,468 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:07,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:07,468 INFO L82 PathProgramCache]: Analyzing trace with hash 2101929440, now seen corresponding path program 2 times [2020-10-21 21:34:07,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:07,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580064824] [2020-10-21 21:34:07,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:07,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:07,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580064824] [2020-10-21 21:34:07,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:34:07,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 21:34:07,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135675024] [2020-10-21 21:34:07,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 21:34:07,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:07,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 21:34:07,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-21 21:34:07,572 INFO L87 Difference]: Start difference. First operand 45 states and 106 transitions. Second operand 6 states. [2020-10-21 21:34:07,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:07,647 INFO L93 Difference]: Finished difference Result 59 states and 138 transitions. [2020-10-21 21:34:07,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 21:34:07,648 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 21:34:07,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:07,649 INFO L225 Difference]: With dead ends: 59 [2020-10-21 21:34:07,649 INFO L226 Difference]: Without dead ends: 53 [2020-10-21 21:34:07,649 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 [2020-10-21 21:34:07,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-21 21:34:07,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2020-10-21 21:34:07,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-21 21:34:07,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 96 transitions. [2020-10-21 21:34:07,657 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 96 transitions. Word has length 10 [2020-10-21 21:34:07,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:07,657 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 96 transitions. [2020-10-21 21:34:07,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 21:34:07,657 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 96 transitions. [2020-10-21 21:34:07,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 21:34:07,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:07,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:07,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-21 21:34:07,659 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:07,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:07,659 INFO L82 PathProgramCache]: Analyzing trace with hash 2082353870, now seen corresponding path program 3 times [2020-10-21 21:34:07,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:07,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978274698] [2020-10-21 21:34:07,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:07,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:07,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978274698] [2020-10-21 21:34:07,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:34:07,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 21:34:07,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955965185] [2020-10-21 21:34:07,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 21:34:07,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:07,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 21:34:07,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-21 21:34:07,719 INFO L87 Difference]: Start difference. First operand 41 states and 96 transitions. Second operand 6 states. [2020-10-21 21:34:07,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:07,785 INFO L93 Difference]: Finished difference Result 65 states and 152 transitions. [2020-10-21 21:34:07,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 21:34:07,786 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 21:34:07,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:07,787 INFO L225 Difference]: With dead ends: 65 [2020-10-21 21:34:07,787 INFO L226 Difference]: Without dead ends: 52 [2020-10-21 21:34:07,787 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 [2020-10-21 21:34:07,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-21 21:34:07,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2020-10-21 21:34:07,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-21 21:34:07,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 99 transitions. [2020-10-21 21:34:07,793 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 99 transitions. Word has length 10 [2020-10-21 21:34:07,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:07,793 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 99 transitions. [2020-10-21 21:34:07,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 21:34:07,794 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 99 transitions. [2020-10-21 21:34:07,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:34:07,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:07,795 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:07,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-21 21:34:07,795 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:07,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:07,796 INFO L82 PathProgramCache]: Analyzing trace with hash 735328415, now seen corresponding path program 4 times [2020-10-21 21:34:07,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:07,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344645465] [2020-10-21 21:34:07,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:07,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344645465] [2020-10-21 21:34:07,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991739885] [2020-10-21 21:34:07,865 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 [2020-10-21 21:34:07,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:34:07,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:07,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 21:34:07,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:07,980 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:07,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:07,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-21 21:34:07,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39961302] [2020-10-21 21:34:07,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 21:34:07,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:08,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 21:34:08,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-21 21:34:08,000 INFO L87 Difference]: Start difference. First operand 41 states and 99 transitions. Second operand 8 states. [2020-10-21 21:34:08,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:08,173 INFO L93 Difference]: Finished difference Result 63 states and 147 transitions. [2020-10-21 21:34:08,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 21:34:08,173 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-21 21:34:08,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:08,174 INFO L225 Difference]: With dead ends: 63 [2020-10-21 21:34:08,174 INFO L226 Difference]: Without dead ends: 54 [2020-10-21 21:34:08,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:34:08,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-21 21:34:08,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-10-21 21:34:08,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-21 21:34:08,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 87 transitions. [2020-10-21 21:34:08,179 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 87 transitions. Word has length 11 [2020-10-21 21:34:08,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:08,179 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 87 transitions. [2020-10-21 21:34:08,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 21:34:08,179 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 87 transitions. [2020-10-21 21:34:08,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:34:08,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:08,180 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:08,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-21 21:34:08,391 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:08,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:08,392 INFO L82 PathProgramCache]: Analyzing trace with hash 128488628, now seen corresponding path program 5 times [2020-10-21 21:34:08,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:08,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236914706] [2020-10-21 21:34:08,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:08,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:08,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236914706] [2020-10-21 21:34:08,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612777097] [2020-10-21 21:34:08,476 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 [2020-10-21 21:34:08,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:34:08,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:08,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 21:34:08,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:08,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:08,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:08,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-21 21:34:08,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293242868] [2020-10-21 21:34:08,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 21:34:08,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:08,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 21:34:08,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-21 21:34:08,574 INFO L87 Difference]: Start difference. First operand 37 states and 87 transitions. Second operand 8 states. [2020-10-21 21:34:08,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:08,668 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-10-21 21:34:08,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-21 21:34:08,669 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-21 21:34:08,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:08,670 INFO L225 Difference]: With dead ends: 56 [2020-10-21 21:34:08,670 INFO L226 Difference]: Without dead ends: 51 [2020-10-21 21:34:08,670 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 [2020-10-21 21:34:08,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-21 21:34:08,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-10-21 21:34:08,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-21 21:34:08,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-21 21:34:08,675 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-21 21:34:08,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:08,676 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-21 21:34:08,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 21:34:08,676 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-21 21:34:08,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:34:08,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:08,677 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:08,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:08,889 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:08,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:08,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1416964401, now seen corresponding path program 6 times [2020-10-21 21:34:08,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:08,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492839817] [2020-10-21 21:34:08,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:08,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492839817] [2020-10-21 21:34:08,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970298442] [2020-10-21 21:34:08,977 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 [2020-10-21 21:34:09,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 21:34:09,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:09,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:34:09,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:09,044 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:09,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:09,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-21 21:34:09,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025822621] [2020-10-21 21:34:09,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 21:34:09,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:09,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 21:34:09,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-21 21:34:09,058 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-21 21:34:09,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:09,157 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-10-21 21:34:09,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 21:34:09,158 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-21 21:34:09,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:09,159 INFO L225 Difference]: With dead ends: 56 [2020-10-21 21:34:09,159 INFO L226 Difference]: Without dead ends: 50 [2020-10-21 21:34:09,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:34:09,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-21 21:34:09,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-10-21 21:34:09,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-21 21:34:09,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-21 21:34:09,164 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-10-21 21:34:09,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:09,164 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-21 21:34:09,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 21:34:09,165 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-21 21:34:09,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:34:09,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:09,166 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:09,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:09,367 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:09,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:09,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1320372483, now seen corresponding path program 7 times [2020-10-21 21:34:09,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:09,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126407584] [2020-10-21 21:34:09,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:09,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:09,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126407584] [2020-10-21 21:34:09,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520930393] [2020-10-21 21:34:09,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:34:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:09,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:34:09,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:09,518 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:09,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:09,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:09,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-21 21:34:09,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672703723] [2020-10-21 21:34:09,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 21:34:09,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:09,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 21:34:09,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-21 21:34:09,545 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 9 states. [2020-10-21 21:34:09,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:09,746 INFO L93 Difference]: Finished difference Result 63 states and 149 transitions. [2020-10-21 21:34:09,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-21 21:34:09,747 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-21 21:34:09,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:09,748 INFO L225 Difference]: With dead ends: 63 [2020-10-21 21:34:09,748 INFO L226 Difference]: Without dead ends: 58 [2020-10-21 21:34:09,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-21 21:34:09,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-21 21:34:09,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-10-21 21:34:09,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-21 21:34:09,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-10-21 21:34:09,757 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 12 [2020-10-21 21:34:09,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:09,757 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-10-21 21:34:09,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 21:34:09,758 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-10-21 21:34:09,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:34:09,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:09,759 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:09,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:09,974 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:09,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:09,974 INFO L82 PathProgramCache]: Analyzing trace with hash -311794613, now seen corresponding path program 8 times [2020-10-21 21:34:09,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:09,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607777140] [2020-10-21 21:34:09,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:10,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607777140] [2020-10-21 21:34:10,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26571068] [2020-10-21 21:34:10,053 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 [2020-10-21 21:34:10,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:34:10,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:10,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:34:10,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:10,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:10,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-21 21:34:10,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292020312] [2020-10-21 21:34:10,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 21:34:10,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:10,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 21:34:10,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-21 21:34:10,147 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 9 states. [2020-10-21 21:34:10,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:10,319 INFO L93 Difference]: Finished difference Result 71 states and 167 transitions. [2020-10-21 21:34:10,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 21:34:10,320 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-21 21:34:10,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:10,321 INFO L225 Difference]: With dead ends: 71 [2020-10-21 21:34:10,321 INFO L226 Difference]: Without dead ends: 62 [2020-10-21 21:34:10,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-21 21:34:10,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-21 21:34:10,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2020-10-21 21:34:10,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-21 21:34:10,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-21 21:34:10,326 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 12 [2020-10-21 21:34:10,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:10,326 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-21 21:34:10,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 21:34:10,327 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-21 21:34:10,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:34:10,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:10,328 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:10,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-21 21:34:10,540 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:10,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:10,541 INFO L82 PathProgramCache]: Analyzing trace with hash -2018100772, now seen corresponding path program 9 times [2020-10-21 21:34:10,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:10,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126952581] [2020-10-21 21:34:10,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:10,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:10,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126952581] [2020-10-21 21:34:10,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313517156] [2020-10-21 21:34:10,608 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 [2020-10-21 21:34:10,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-21 21:34:10,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:10,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:34:10,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:10,700 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:10,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:10,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-21 21:34:10,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412000186] [2020-10-21 21:34:10,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 21:34:10,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:10,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 21:34:10,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-21 21:34:10,714 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-21 21:34:10,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:10,990 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-10-21 21:34:10,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 21:34:10,990 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-21 21:34:10,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:10,992 INFO L225 Difference]: With dead ends: 72 [2020-10-21 21:34:10,992 INFO L226 Difference]: Without dead ends: 63 [2020-10-21 21:34:10,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-21 21:34:10,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-21 21:34:10,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-10-21 21:34:10,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-21 21:34:10,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-10-21 21:34:10,998 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 13 [2020-10-21 21:34:10,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:10,999 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-10-21 21:34:10,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 21:34:10,999 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-10-21 21:34:11,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:34:11,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:11,001 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:11,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:11,213 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:11,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:11,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1075670313, now seen corresponding path program 10 times [2020-10-21 21:34:11,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:11,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563474150] [2020-10-21 21:34:11,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:11,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563474150] [2020-10-21 21:34:11,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758184264] [2020-10-21 21:34:11,293 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 [2020-10-21 21:34:11,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:34:11,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:11,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:34:11,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:11,388 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:11,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:11,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:11,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-21 21:34:11,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939254147] [2020-10-21 21:34:11,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 21:34:11,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:11,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 21:34:11,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-21 21:34:11,399 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 10 states. [2020-10-21 21:34:11,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:11,588 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-10-21 21:34:11,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-21 21:34:11,592 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-21 21:34:11,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:11,592 INFO L225 Difference]: With dead ends: 64 [2020-10-21 21:34:11,593 INFO L226 Difference]: Without dead ends: 59 [2020-10-21 21:34:11,593 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 [2020-10-21 21:34:11,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-21 21:34:11,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-10-21 21:34:11,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-21 21:34:11,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-21 21:34:11,603 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-21 21:34:11,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:11,603 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-21 21:34:11,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 21:34:11,604 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-21 21:34:11,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 21:34:11,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:11,608 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:11,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:11,819 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:11,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:11,820 INFO L82 PathProgramCache]: Analyzing trace with hash 198162772, now seen corresponding path program 11 times [2020-10-21 21:34:11,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:11,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377072082] [2020-10-21 21:34:11,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:11,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:11,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377072082] [2020-10-21 21:34:11,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171511531] [2020-10-21 21:34:11,908 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 [2020-10-21 21:34:11,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 21:34:11,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:11,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 21:34:11,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:11,960 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:11,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:11,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:11,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-21 21:34:11,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264338605] [2020-10-21 21:34:11,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 21:34:11,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:11,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 21:34:11,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-21 21:34:11,983 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-21 21:34:12,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:12,143 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-10-21 21:34:12,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 21:34:12,146 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-21 21:34:12,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:12,147 INFO L225 Difference]: With dead ends: 64 [2020-10-21 21:34:12,147 INFO L226 Difference]: Without dead ends: 58 [2020-10-21 21:34:12,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-21 21:34:12,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-21 21:34:12,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-10-21 21:34:12,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-21 21:34:12,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-21 21:34:12,152 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 14 [2020-10-21 21:34:12,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:12,152 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-21 21:34:12,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 21:34:12,152 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-21 21:34:12,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 21:34:12,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:12,153 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:12,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-21 21:34:12,363 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:12,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:12,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1863413606, now seen corresponding path program 12 times [2020-10-21 21:34:12,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:12,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234282030] [2020-10-21 21:34:12,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:12,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:12,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234282030] [2020-10-21 21:34:12,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006749341] [2020-10-21 21:34:12,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:34:12,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-21 21:34:12,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:12,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:34:12,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:12,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:12,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:12,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:12,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-21 21:34:12,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676625284] [2020-10-21 21:34:12,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 21:34:12,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:12,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 21:34:12,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-21 21:34:12,527 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 11 states. [2020-10-21 21:34:12,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:12,800 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-21 21:34:12,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-21 21:34:12,800 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-21 21:34:12,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:12,801 INFO L225 Difference]: With dead ends: 73 [2020-10-21 21:34:12,801 INFO L226 Difference]: Without dead ends: 68 [2020-10-21 21:34:12,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-21 21:34:12,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-21 21:34:12,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2020-10-21 21:34:12,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-21 21:34:12,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-10-21 21:34:12,806 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 14 [2020-10-21 21:34:12,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:12,806 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-10-21 21:34:12,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 21:34:12,806 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-10-21 21:34:12,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 21:34:12,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:12,807 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:13,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:13,014 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:13,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:13,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1013983880, now seen corresponding path program 13 times [2020-10-21 21:34:13,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:13,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625760155] [2020-10-21 21:34:13,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:13,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:13,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625760155] [2020-10-21 21:34:13,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208787680] [2020-10-21 21:34:13,102 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 [2020-10-21 21:34:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:13,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:34:13,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:13,176 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:13,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:13,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-21 21:34:13,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542236629] [2020-10-21 21:34:13,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 21:34:13,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:13,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 21:34:13,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-21 21:34:13,188 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 11 states. [2020-10-21 21:34:13,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:13,455 INFO L93 Difference]: Finished difference Result 81 states and 191 transitions. [2020-10-21 21:34:13,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-21 21:34:13,455 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-21 21:34:13,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:13,456 INFO L225 Difference]: With dead ends: 81 [2020-10-21 21:34:13,456 INFO L226 Difference]: Without dead ends: 72 [2020-10-21 21:34:13,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-10-21 21:34:13,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-21 21:34:13,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-10-21 21:34:13,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-21 21:34:13,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-21 21:34:13,460 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 14 [2020-10-21 21:34:13,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:13,461 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-21 21:34:13,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 21:34:13,461 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-21 21:34:13,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-21 21:34:13,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:13,462 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:13,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-21 21:34:13,671 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:13,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:13,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1931272153, now seen corresponding path program 14 times [2020-10-21 21:34:13,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:13,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40443117] [2020-10-21 21:34:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:13,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:13,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40443117] [2020-10-21 21:34:13,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921018449] [2020-10-21 21:34:13,745 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 [2020-10-21 21:34:13,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:34:13,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:13,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-21 21:34:13,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:13,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:13,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-21 21:34:13,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032153409] [2020-10-21 21:34:13,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-21 21:34:13,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:13,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-21 21:34:13,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-21 21:34:13,839 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-21 21:34:14,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:14,183 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-10-21 21:34:14,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 21:34:14,184 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-21 21:34:14,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:14,185 INFO L225 Difference]: With dead ends: 82 [2020-10-21 21:34:14,185 INFO L226 Difference]: Without dead ends: 73 [2020-10-21 21:34:14,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-21 21:34:14,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-21 21:34:14,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2020-10-21 21:34:14,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-21 21:34:14,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-10-21 21:34:14,190 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 15 [2020-10-21 21:34:14,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:14,190 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-10-21 21:34:14,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-21 21:34:14,190 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-10-21 21:34:14,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-21 21:34:14,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:14,191 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:14,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-21 21:34:14,402 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:14,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:14,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1368757306, now seen corresponding path program 15 times [2020-10-21 21:34:14,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:14,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691257103] [2020-10-21 21:34:14,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:14,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:14,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691257103] [2020-10-21 21:34:14,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178120117] [2020-10-21 21:34:14,489 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 [2020-10-21 21:34:14,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-21 21:34:14,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:14,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 21:34:14,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:14,578 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:14,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:14,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:14,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-21 21:34:14,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976740590] [2020-10-21 21:34:14,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-21 21:34:14,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:14,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-21 21:34:14,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-21 21:34:14,595 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 12 states. [2020-10-21 21:34:14,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:14,878 INFO L93 Difference]: Finished difference Result 72 states and 173 transitions. [2020-10-21 21:34:14,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-21 21:34:14,878 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-21 21:34:14,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:14,879 INFO L225 Difference]: With dead ends: 72 [2020-10-21 21:34:14,879 INFO L226 Difference]: Without dead ends: 67 [2020-10-21 21:34:14,880 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 [2020-10-21 21:34:14,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-21 21:34:14,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-10-21 21:34:14,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-21 21:34:14,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-21 21:34:14,883 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-21 21:34:14,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:14,883 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-21 21:34:14,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-21 21:34:14,883 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-21 21:34:14,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-21 21:34:14,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:14,884 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:15,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-21 21:34:15,095 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:15,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:15,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1455869111, now seen corresponding path program 16 times [2020-10-21 21:34:15,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:15,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45910148] [2020-10-21 21:34:15,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:15,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:15,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:15,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45910148] [2020-10-21 21:34:15,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192415312] [2020-10-21 21:34:15,209 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 [2020-10-21 21:34:15,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:34:15,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:15,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-21 21:34:15,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:15,262 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:15,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:15,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-21 21:34:15,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237946414] [2020-10-21 21:34:15,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-21 21:34:15,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:15,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-21 21:34:15,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-21 21:34:15,276 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-21 21:34:15,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:15,442 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-10-21 21:34:15,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 21:34:15,443 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-21 21:34:15,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:15,444 INFO L225 Difference]: With dead ends: 72 [2020-10-21 21:34:15,444 INFO L226 Difference]: Without dead ends: 66 [2020-10-21 21:34:15,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-10-21 21:34:15,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-21 21:34:15,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-10-21 21:34:15,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-21 21:34:15,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-21 21:34:15,448 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 16 [2020-10-21 21:34:15,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:15,448 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-21 21:34:15,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-21 21:34:15,449 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-21 21:34:15,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-21 21:34:15,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:15,449 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:15,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-21 21:34:15,653 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:15,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:15,653 INFO L82 PathProgramCache]: Analyzing trace with hash -260077303, now seen corresponding path program 17 times [2020-10-21 21:34:15,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:15,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857584428] [2020-10-21 21:34:15,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:15,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:15,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857584428] [2020-10-21 21:34:15,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187975610] [2020-10-21 21:34:15,732 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 [2020-10-21 21:34:15,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-21 21:34:15,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:15,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-21 21:34:15,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:15,829 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:15,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:15,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-21 21:34:15,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917954783] [2020-10-21 21:34:15,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:34:15,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:15,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:34:15,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:34:15,846 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 13 states. [2020-10-21 21:34:16,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:16,238 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-21 21:34:16,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-21 21:34:16,239 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-21 21:34:16,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:16,240 INFO L225 Difference]: With dead ends: 83 [2020-10-21 21:34:16,240 INFO L226 Difference]: Without dead ends: 78 [2020-10-21 21:34:16,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-21 21:34:16,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-21 21:34:16,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2020-10-21 21:34:16,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-21 21:34:16,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-10-21 21:34:16,244 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 16 [2020-10-21 21:34:16,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:16,245 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-10-21 21:34:16,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:34:16,245 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-10-21 21:34:16,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-21 21:34:16,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:16,245 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:16,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:16,456 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:16,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:16,456 INFO L82 PathProgramCache]: Analyzing trace with hash -518171259, now seen corresponding path program 18 times [2020-10-21 21:34:16,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:16,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025479812] [2020-10-21 21:34:16,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:16,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:16,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025479812] [2020-10-21 21:34:16,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996881266] [2020-10-21 21:34:16,551 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 [2020-10-21 21:34:16,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-21 21:34:16,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:16,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-21 21:34:16,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:16,652 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:16,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:16,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-21 21:34:16,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146221777] [2020-10-21 21:34:16,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:34:16,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:16,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:34:16,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:34:16,665 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 13 states. [2020-10-21 21:34:17,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:17,030 INFO L93 Difference]: Finished difference Result 91 states and 215 transitions. [2020-10-21 21:34:17,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 21:34:17,030 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-21 21:34:17,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:17,031 INFO L225 Difference]: With dead ends: 91 [2020-10-21 21:34:17,032 INFO L226 Difference]: Without dead ends: 82 [2020-10-21 21:34:17,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-10-21 21:34:17,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-21 21:34:17,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2020-10-21 21:34:17,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-21 21:34:17,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-21 21:34:17,035 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 16 [2020-10-21 21:34:17,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:17,036 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-21 21:34:17,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:34:17,036 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-21 21:34:17,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-21 21:34:17,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:17,037 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:17,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:17,247 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:17,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:17,248 INFO L82 PathProgramCache]: Analyzing trace with hash 527563414, now seen corresponding path program 19 times [2020-10-21 21:34:17,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:17,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124664556] [2020-10-21 21:34:17,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:17,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:17,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124664556] [2020-10-21 21:34:17,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311923745] [2020-10-21 21:34:17,332 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 [2020-10-21 21:34:17,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:17,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-21 21:34:17,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:17,455 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:17,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:17,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-21 21:34:17,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457407756] [2020-10-21 21:34:17,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 21:34:17,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:17,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 21:34:17,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-21 21:34:17,470 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-21 21:34:17,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:17,918 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-21 21:34:17,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 21:34:17,920 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-21 21:34:17,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:17,921 INFO L225 Difference]: With dead ends: 92 [2020-10-21 21:34:17,921 INFO L226 Difference]: Without dead ends: 83 [2020-10-21 21:34:17,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-21 21:34:17,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-21 21:34:17,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2020-10-21 21:34:17,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-21 21:34:17,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-10-21 21:34:17,925 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 17 [2020-10-21 21:34:17,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:17,925 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-10-21 21:34:17,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 21:34:17,925 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-10-21 21:34:17,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-21 21:34:17,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:17,926 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:18,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:18,129 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:18,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:18,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1116588253, now seen corresponding path program 20 times [2020-10-21 21:34:18,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:18,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103041309] [2020-10-21 21:34:18,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:18,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103041309] [2020-10-21 21:34:18,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597149620] [2020-10-21 21:34:18,228 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 [2020-10-21 21:34:18,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:34:18,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:18,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-21 21:34:18,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:18,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:18,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-21 21:34:18,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096299371] [2020-10-21 21:34:18,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 21:34:18,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:18,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 21:34:18,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-21 21:34:18,346 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 14 states. [2020-10-21 21:34:18,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:18,764 INFO L93 Difference]: Finished difference Result 80 states and 193 transitions. [2020-10-21 21:34:18,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-21 21:34:18,765 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-21 21:34:18,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:18,766 INFO L225 Difference]: With dead ends: 80 [2020-10-21 21:34:18,766 INFO L226 Difference]: Without dead ends: 75 [2020-10-21 21:34:18,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=734, Unknown=0, NotChecked=0, Total=1056 [2020-10-21 21:34:18,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-21 21:34:18,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-10-21 21:34:18,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-21 21:34:18,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-21 21:34:18,770 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-21 21:34:18,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:18,771 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-21 21:34:18,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 21:34:18,771 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-21 21:34:18,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-21 21:34:18,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:18,771 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:18,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-21 21:34:18,980 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:18,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:18,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1069116582, now seen corresponding path program 21 times [2020-10-21 21:34:18,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:18,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202749298] [2020-10-21 21:34:18,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:19,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202749298] [2020-10-21 21:34:19,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40415898] [2020-10-21 21:34:19,107 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 [2020-10-21 21:34:19,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-21 21:34:19,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:19,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-21 21:34:19,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:19,159 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:19,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:19,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-21 21:34:19,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554182550] [2020-10-21 21:34:19,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 21:34:19,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:19,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 21:34:19,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-10-21 21:34:19,174 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-21 21:34:19,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:19,415 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-21 21:34:19,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 21:34:19,415 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-21 21:34:19,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:19,416 INFO L225 Difference]: With dead ends: 80 [2020-10-21 21:34:19,416 INFO L226 Difference]: Without dead ends: 74 [2020-10-21 21:34:19,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-10-21 21:34:19,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-21 21:34:19,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-10-21 21:34:19,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-21 21:34:19,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-21 21:34:19,420 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-10-21 21:34:19,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:19,420 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-21 21:34:19,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 21:34:19,420 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-21 21:34:19,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-21 21:34:19,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:19,421 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:19,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-21 21:34:19,623 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:19,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:19,624 INFO L82 PathProgramCache]: Analyzing trace with hash -825375252, now seen corresponding path program 22 times [2020-10-21 21:34:19,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:19,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926910273] [2020-10-21 21:34:19,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:19,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:19,738 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:19,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926910273] [2020-10-21 21:34:19,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179733636] [2020-10-21 21:34:19,739 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 [2020-10-21 21:34:19,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:34:19,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:19,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-21 21:34:19,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:19,812 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:19,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:19,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-21 21:34:19,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589697407] [2020-10-21 21:34:19,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:34:19,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:19,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:34:19,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:34:19,828 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 15 states. [2020-10-21 21:34:20,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:20,311 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-21 21:34:20,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-21 21:34:20,312 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-21 21:34:20,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:20,313 INFO L225 Difference]: With dead ends: 93 [2020-10-21 21:34:20,313 INFO L226 Difference]: Without dead ends: 88 [2020-10-21 21:34:20,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-21 21:34:20,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-21 21:34:20,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 53. [2020-10-21 21:34:20,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-21 21:34:20,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-10-21 21:34:20,316 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 18 [2020-10-21 21:34:20,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:20,317 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-10-21 21:34:20,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:34:20,317 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-10-21 21:34:20,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-21 21:34:20,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:20,317 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:20,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-21 21:34:20,525 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:20,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:20,525 INFO L82 PathProgramCache]: Analyzing trace with hash 254522690, now seen corresponding path program 23 times [2020-10-21 21:34:20,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:20,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605288883] [2020-10-21 21:34:20,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:20,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605288883] [2020-10-21 21:34:20,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563049441] [2020-10-21 21:34:20,619 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 [2020-10-21 21:34:20,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-21 21:34:20,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:20,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-21 21:34:20,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:20,699 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:20,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:20,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-21 21:34:20,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697125616] [2020-10-21 21:34:20,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:34:20,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:20,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:34:20,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:34:20,721 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 15 states. [2020-10-21 21:34:21,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:21,268 INFO L93 Difference]: Finished difference Result 101 states and 239 transitions. [2020-10-21 21:34:21,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-21 21:34:21,269 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-21 21:34:21,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:21,270 INFO L225 Difference]: With dead ends: 101 [2020-10-21 21:34:21,270 INFO L226 Difference]: Without dead ends: 92 [2020-10-21 21:34:21,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-21 21:34:21,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-21 21:34:21,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-21 21:34:21,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-21 21:34:21,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-21 21:34:21,274 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 18 [2020-10-21 21:34:21,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:21,274 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-21 21:34:21,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:34:21,275 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-21 21:34:21,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-21 21:34:21,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:21,275 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:21,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-21 21:34:21,484 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:21,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:21,484 INFO L82 PathProgramCache]: Analyzing trace with hash 183196179, now seen corresponding path program 24 times [2020-10-21 21:34:21,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:21,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968919618] [2020-10-21 21:34:21,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:21,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:21,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968919618] [2020-10-21 21:34:21,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571765351] [2020-10-21 21:34:21,597 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 [2020-10-21 21:34:21,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-21 21:34:21,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:21,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-21 21:34:21,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:21,692 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:21,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:21,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-21 21:34:21,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509471747] [2020-10-21 21:34:21,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 21:34:21,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:21,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 21:34:21,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-21 21:34:21,694 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-21 21:34:22,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:22,262 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-10-21 21:34:22,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 21:34:22,262 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-21 21:34:22,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:22,263 INFO L225 Difference]: With dead ends: 102 [2020-10-21 21:34:22,263 INFO L226 Difference]: Without dead ends: 93 [2020-10-21 21:34:22,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482 [2020-10-21 21:34:22,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-21 21:34:22,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2020-10-21 21:34:22,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-21 21:34:22,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-10-21 21:34:22,267 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 19 [2020-10-21 21:34:22,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:22,267 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-10-21 21:34:22,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 21:34:22,267 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-10-21 21:34:22,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-21 21:34:22,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:22,271 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:22,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-21 21:34:22,480 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:22,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:22,480 INFO L82 PathProgramCache]: Analyzing trace with hash -699703104, now seen corresponding path program 25 times [2020-10-21 21:34:22,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:22,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339196657] [2020-10-21 21:34:22,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:22,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339196657] [2020-10-21 21:34:22,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489512249] [2020-10-21 21:34:22,584 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 [2020-10-21 21:34:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:22,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-21 21:34:22,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:22,666 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:22,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:22,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-21 21:34:22,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123529215] [2020-10-21 21:34:22,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 21:34:22,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:22,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 21:34:22,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-21 21:34:22,680 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 16 states. [2020-10-21 21:34:23,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:23,386 INFO L93 Difference]: Finished difference Result 88 states and 213 transitions. [2020-10-21 21:34:23,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-21 21:34:23,387 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-21 21:34:23,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:23,388 INFO L225 Difference]: With dead ends: 88 [2020-10-21 21:34:23,389 INFO L226 Difference]: Without dead ends: 83 [2020-10-21 21:34:23,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-10-21 21:34:23,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-21 21:34:23,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-10-21 21:34:23,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-21 21:34:23,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-21 21:34:23,394 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-21 21:34:23,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:23,394 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-21 21:34:23,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 21:34:23,395 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-21 21:34:23,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-21 21:34:23,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:23,395 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:23,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:23,606 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:23,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:23,607 INFO L82 PathProgramCache]: Analyzing trace with hash -923845315, now seen corresponding path program 26 times [2020-10-21 21:34:23,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:23,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550072809] [2020-10-21 21:34:23,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:23,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550072809] [2020-10-21 21:34:23,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209126299] [2020-10-21 21:34:23,839 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 [2020-10-21 21:34:23,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:34:23,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:23,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-21 21:34:23,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:23,922 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:23,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:23,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-21 21:34:23,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097062596] [2020-10-21 21:34:23,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 21:34:23,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:23,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 21:34:23,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-21 21:34:23,938 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-21 21:34:24,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:24,213 INFO L93 Difference]: Finished difference Result 88 states and 211 transitions. [2020-10-21 21:34:24,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-21 21:34:24,214 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-21 21:34:24,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:24,215 INFO L225 Difference]: With dead ends: 88 [2020-10-21 21:34:24,215 INFO L226 Difference]: Without dead ends: 82 [2020-10-21 21:34:24,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2020-10-21 21:34:24,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-21 21:34:24,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2020-10-21 21:34:24,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-21 21:34:24,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-21 21:34:24,219 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 20 [2020-10-21 21:34:24,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:24,219 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-21 21:34:24,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 21:34:24,220 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-21 21:34:24,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-21 21:34:24,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:24,220 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:24,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-21 21:34:24,430 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:24,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:24,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1384142351, now seen corresponding path program 27 times [2020-10-21 21:34:24,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:24,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925523656] [2020-10-21 21:34:24,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:24,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925523656] [2020-10-21 21:34:24,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304272021] [2020-10-21 21:34:24,604 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 [2020-10-21 21:34:24,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-21 21:34:24,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:24,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-21 21:34:24,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:24,730 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:24,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:24,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-21 21:34:24,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341234623] [2020-10-21 21:34:24,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-21 21:34:24,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:24,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-21 21:34:24,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-21 21:34:24,753 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 17 states. [2020-10-21 21:34:25,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:25,449 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-21 21:34:25,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-21 21:34:25,449 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-21 21:34:25,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:25,450 INFO L225 Difference]: With dead ends: 103 [2020-10-21 21:34:25,450 INFO L226 Difference]: Without dead ends: 98 [2020-10-21 21:34:25,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-10-21 21:34:25,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-21 21:34:25,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 57. [2020-10-21 21:34:25,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-21 21:34:25,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-10-21 21:34:25,454 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 20 [2020-10-21 21:34:25,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:25,454 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-10-21 21:34:25,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-21 21:34:25,454 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-10-21 21:34:25,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-21 21:34:25,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:25,455 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:25,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-21 21:34:25,656 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:25,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:25,656 INFO L82 PathProgramCache]: Analyzing trace with hash -215934529, now seen corresponding path program 28 times [2020-10-21 21:34:25,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:25,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697316912] [2020-10-21 21:34:25,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:25,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697316912] [2020-10-21 21:34:25,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941109967] [2020-10-21 21:34:25,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:34:25,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:34:25,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:25,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-21 21:34:25,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:25,855 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:25,865 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:25,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:25,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-21 21:34:25,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640373510] [2020-10-21 21:34:25,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-21 21:34:25,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:25,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-21 21:34:25,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-21 21:34:25,868 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 17 states. [2020-10-21 21:34:26,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:26,503 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-21 21:34:26,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-21 21:34:26,504 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-21 21:34:26,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:26,505 INFO L225 Difference]: With dead ends: 111 [2020-10-21 21:34:26,505 INFO L226 Difference]: Without dead ends: 102 [2020-10-21 21:34:26,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-10-21 21:34:26,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-21 21:34:26,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2020-10-21 21:34:26,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-21 21:34:26,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-21 21:34:26,510 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 20 [2020-10-21 21:34:26,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:26,510 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-21 21:34:26,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-21 21:34:26,510 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-21 21:34:26,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-21 21:34:26,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:26,511 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:26,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:26,722 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:26,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:26,723 INFO L82 PathProgramCache]: Analyzing trace with hash -41234864, now seen corresponding path program 29 times [2020-10-21 21:34:26,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:26,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794264772] [2020-10-21 21:34:26,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:26,862 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:26,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794264772] [2020-10-21 21:34:26,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15474180] [2020-10-21 21:34:26,863 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 [2020-10-21 21:34:26,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-21 21:34:26,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:26,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-21 21:34:26,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:26,949 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:26,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:26,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-21 21:34:26,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942594134] [2020-10-21 21:34:26,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-21 21:34:26,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:26,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-21 21:34:26,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-21 21:34:26,970 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-21 21:34:27,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:27,698 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-10-21 21:34:27,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-21 21:34:27,700 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-21 21:34:27,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:27,701 INFO L225 Difference]: With dead ends: 112 [2020-10-21 21:34:27,701 INFO L226 Difference]: Without dead ends: 103 [2020-10-21 21:34:27,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-10-21 21:34:27,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-21 21:34:27,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 57. [2020-10-21 21:34:27,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-21 21:34:27,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-10-21 21:34:27,704 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 21 [2020-10-21 21:34:27,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:27,704 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-10-21 21:34:27,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-21 21:34:27,704 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-10-21 21:34:27,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-21 21:34:27,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:27,705 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:27,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:27,913 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:27,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:27,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1895992291, now seen corresponding path program 30 times [2020-10-21 21:34:27,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:27,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357568038] [2020-10-21 21:34:27,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:27,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:28,040 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:28,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357568038] [2020-10-21 21:34:28,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697623192] [2020-10-21 21:34:28,041 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 [2020-10-21 21:34:28,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-21 21:34:28,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:28,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-21 21:34:28,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:28,126 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:28,140 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:28,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:28,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-21 21:34:28,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127898552] [2020-10-21 21:34:28,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-21 21:34:28,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:28,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-21 21:34:28,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-21 21:34:28,142 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 18 states. [2020-10-21 21:34:28,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:28,790 INFO L93 Difference]: Finished difference Result 96 states and 233 transitions. [2020-10-21 21:34:28,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-21 21:34:28,793 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-21 21:34:28,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:28,794 INFO L225 Difference]: With dead ends: 96 [2020-10-21 21:34:28,795 INFO L226 Difference]: Without dead ends: 91 [2020-10-21 21:34:28,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-10-21 21:34:28,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-21 21:34:28,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2020-10-21 21:34:28,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-21 21:34:28,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-21 21:34:28,798 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-21 21:34:28,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:28,799 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-21 21:34:28,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-21 21:34:28,799 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-21 21:34:28,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-21 21:34:28,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:28,799 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:29,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-21 21:34:29,005 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:29,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:29,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1242888800, now seen corresponding path program 31 times [2020-10-21 21:34:29,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:29,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694959188] [2020-10-21 21:34:29,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:29,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694959188] [2020-10-21 21:34:29,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058350712] [2020-10-21 21:34:29,206 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 [2020-10-21 21:34:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:29,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-21 21:34:29,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:29,257 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:29,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:29,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-21 21:34:29,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962349071] [2020-10-21 21:34:29,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-21 21:34:29,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:29,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-21 21:34:29,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-21 21:34:29,273 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-21 21:34:29,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:29,615 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-21 21:34:29,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 21:34:29,616 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-21 21:34:29,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:29,617 INFO L225 Difference]: With dead ends: 96 [2020-10-21 21:34:29,617 INFO L226 Difference]: Without dead ends: 90 [2020-10-21 21:34:29,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=704, Unknown=0, NotChecked=0, Total=1056 [2020-10-21 21:34:29,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-21 21:34:29,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2020-10-21 21:34:29,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-21 21:34:29,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-21 21:34:29,621 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 22 [2020-10-21 21:34:29,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:29,621 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-21 21:34:29,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-21 21:34:29,621 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-21 21:34:29,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-21 21:34:29,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:29,622 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:29,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:29,830 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:29,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:29,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1278252686, now seen corresponding path program 32 times [2020-10-21 21:34:29,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:29,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903583227] [2020-10-21 21:34:29,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:29,967 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:29,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903583227] [2020-10-21 21:34:29,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870513263] [2020-10-21 21:34:29,968 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 [2020-10-21 21:34:30,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:34:30,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:30,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-21 21:34:30,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:30,051 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:30,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:30,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-21 21:34:30,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303202898] [2020-10-21 21:34:30,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-21 21:34:30,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:30,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-21 21:34:30,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-21 21:34:30,066 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 19 states. [2020-10-21 21:34:30,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:30,947 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-21 21:34:30,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-21 21:34:30,947 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-21 21:34:30,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:30,948 INFO L225 Difference]: With dead ends: 113 [2020-10-21 21:34:30,948 INFO L226 Difference]: Without dead ends: 108 [2020-10-21 21:34:30,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-10-21 21:34:30,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-21 21:34:30,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 61. [2020-10-21 21:34:30,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-21 21:34:30,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-10-21 21:34:30,952 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 22 [2020-10-21 21:34:30,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:30,953 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-10-21 21:34:30,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-21 21:34:30,953 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-10-21 21:34:30,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-21 21:34:30,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:30,953 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:31,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-21 21:34:31,162 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:31,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:31,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1353755908, now seen corresponding path program 33 times [2020-10-21 21:34:31,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:31,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950158036] [2020-10-21 21:34:31,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:31,326 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:31,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950158036] [2020-10-21 21:34:31,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977660183] [2020-10-21 21:34:31,326 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 [2020-10-21 21:34:31,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-21 21:34:31,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:31,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-21 21:34:31,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:31,414 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:31,429 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:31,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:31,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-21 21:34:31,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36405860] [2020-10-21 21:34:31,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-21 21:34:31,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:31,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-21 21:34:31,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-21 21:34:31,431 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 19 states. [2020-10-21 21:34:32,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:32,245 INFO L93 Difference]: Finished difference Result 121 states and 287 transitions. [2020-10-21 21:34:32,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-21 21:34:32,246 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-21 21:34:32,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:32,247 INFO L225 Difference]: With dead ends: 121 [2020-10-21 21:34:32,247 INFO L226 Difference]: Without dead ends: 112 [2020-10-21 21:34:32,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-10-21 21:34:32,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-21 21:34:32,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 77. [2020-10-21 21:34:32,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-21 21:34:32,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-21 21:34:32,251 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 22 [2020-10-21 21:34:32,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:32,252 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-21 21:34:32,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-21 21:34:32,252 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-21 21:34:32,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-21 21:34:32,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:32,253 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:32,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:32,462 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:32,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:32,462 INFO L82 PathProgramCache]: Analyzing trace with hash -971102387, now seen corresponding path program 34 times [2020-10-21 21:34:32,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:32,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051508824] [2020-10-21 21:34:32,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:32,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051508824] [2020-10-21 21:34:32,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280584975] [2020-10-21 21:34:32,636 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 [2020-10-21 21:34:32,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:34:32,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:32,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-21 21:34:32,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:32,724 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:32,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:32,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-21 21:34:32,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452777399] [2020-10-21 21:34:32,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-21 21:34:32,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:32,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-21 21:34:32,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-21 21:34:32,740 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-21 21:34:33,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:33,578 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-10-21 21:34:33,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-21 21:34:33,579 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-21 21:34:33,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:33,580 INFO L225 Difference]: With dead ends: 122 [2020-10-21 21:34:33,581 INFO L226 Difference]: Without dead ends: 113 [2020-10-21 21:34:33,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-10-21 21:34:33,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-21 21:34:33,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 61. [2020-10-21 21:34:33,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-21 21:34:33,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-10-21 21:34:33,585 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 23 [2020-10-21 21:34:33,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:33,585 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-10-21 21:34:33,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-21 21:34:33,586 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-10-21 21:34:33,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-21 21:34:33,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:33,586 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:33,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-21 21:34:33,797 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:33,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:33,797 INFO L82 PathProgramCache]: Analyzing trace with hash 983267910, now seen corresponding path program 35 times [2020-10-21 21:34:33,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:33,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982000416] [2020-10-21 21:34:33,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:33,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982000416] [2020-10-21 21:34:33,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002315293] [2020-10-21 21:34:33,948 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 [2020-10-21 21:34:34,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-21 21:34:34,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:34,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-21 21:34:34,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:34,032 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:34,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:34,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-21 21:34:34,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286756612] [2020-10-21 21:34:34,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-21 21:34:34,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:34,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-21 21:34:34,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-21 21:34:34,048 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 20 states. [2020-10-21 21:34:34,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:34,846 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2020-10-21 21:34:34,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-21 21:34:34,846 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-21 21:34:34,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:34,848 INFO L225 Difference]: With dead ends: 104 [2020-10-21 21:34:34,848 INFO L226 Difference]: Without dead ends: 99 [2020-10-21 21:34:34,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-10-21 21:34:34,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-21 21:34:34,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2020-10-21 21:34:34,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-21 21:34:34,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-21 21:34:34,852 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-21 21:34:34,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:34,853 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-21 21:34:34,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-21 21:34:34,853 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-21 21:34:34,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-21 21:34:34,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:34,854 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:35,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-21 21:34:35,064 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:35,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:35,064 INFO L82 PathProgramCache]: Analyzing trace with hash 415234755, now seen corresponding path program 36 times [2020-10-21 21:34:35,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:35,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764963036] [2020-10-21 21:34:35,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:35,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764963036] [2020-10-21 21:34:35,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771055647] [2020-10-21 21:34:35,292 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 [2020-10-21 21:34:35,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-21 21:34:35,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:35,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-21 21:34:35,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:35,356 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:35,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:35,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-21 21:34:35,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274221375] [2020-10-21 21:34:35,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-21 21:34:35,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:35,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-21 21:34:35,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-10-21 21:34:35,375 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-21 21:34:35,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:35,768 INFO L93 Difference]: Finished difference Result 104 states and 251 transitions. [2020-10-21 21:34:35,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 21:34:35,768 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-21 21:34:35,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:35,770 INFO L225 Difference]: With dead ends: 104 [2020-10-21 21:34:35,770 INFO L226 Difference]: Without dead ends: 98 [2020-10-21 21:34:35,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2020-10-21 21:34:35,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-21 21:34:35,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-10-21 21:34:35,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-21 21:34:35,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-21 21:34:35,774 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 24 [2020-10-21 21:34:35,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:35,775 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-21 21:34:35,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-21 21:34:35,775 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-21 21:34:35,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-21 21:34:35,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:35,776 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:35,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-21 21:34:35,987 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:35,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:35,987 INFO L82 PathProgramCache]: Analyzing trace with hash -39374827, now seen corresponding path program 37 times [2020-10-21 21:34:35,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:35,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750085786] [2020-10-21 21:34:35,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:35,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:36,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750085786] [2020-10-21 21:34:36,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139293728] [2020-10-21 21:34:36,170 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 [2020-10-21 21:34:36,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:36,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-21 21:34:36,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:36,288 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:36,304 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:36,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:36,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-21 21:34:36,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890338140] [2020-10-21 21:34:36,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-21 21:34:36,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:36,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-21 21:34:36,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-21 21:34:36,306 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 21 states. [2020-10-21 21:34:37,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:37,193 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-21 21:34:37,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-21 21:34:37,193 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-21 21:34:37,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:37,194 INFO L225 Difference]: With dead ends: 123 [2020-10-21 21:34:37,194 INFO L226 Difference]: Without dead ends: 118 [2020-10-21 21:34:37,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-21 21:34:37,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-21 21:34:37,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 65. [2020-10-21 21:34:37,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-21 21:34:37,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-10-21 21:34:37,198 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 24 [2020-10-21 21:34:37,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:37,198 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-10-21 21:34:37,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-21 21:34:37,199 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-10-21 21:34:37,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-21 21:34:37,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:37,199 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:37,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-21 21:34:37,410 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:37,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:37,410 INFO L82 PathProgramCache]: Analyzing trace with hash 416559353, now seen corresponding path program 38 times [2020-10-21 21:34:37,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:37,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224996176] [2020-10-21 21:34:37,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:37,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:37,585 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:37,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224996176] [2020-10-21 21:34:37,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91168456] [2020-10-21 21:34:37,586 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 [2020-10-21 21:34:37,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:34:37,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:37,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-21 21:34:37,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:37,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:37,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-21 21:34:37,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837039910] [2020-10-21 21:34:37,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-21 21:34:37,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:37,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-21 21:34:37,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-21 21:34:37,689 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 21 states. [2020-10-21 21:34:38,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:38,567 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-21 21:34:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-21 21:34:38,567 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-21 21:34:38,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:38,568 INFO L225 Difference]: With dead ends: 131 [2020-10-21 21:34:38,569 INFO L226 Difference]: Without dead ends: 122 [2020-10-21 21:34:38,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2020-10-21 21:34:38,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-21 21:34:38,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 83. [2020-10-21 21:34:38,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-21 21:34:38,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-21 21:34:38,573 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 24 [2020-10-21 21:34:38,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:38,573 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-21 21:34:38,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-21 21:34:38,574 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-21 21:34:38,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-21 21:34:38,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:38,574 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:38,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-21 21:34:38,786 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:38,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:38,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1220594422, now seen corresponding path program 39 times [2020-10-21 21:34:38,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:38,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515049108] [2020-10-21 21:34:38,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:38,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515049108] [2020-10-21 21:34:38,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121371381] [2020-10-21 21:34:38,955 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 [2020-10-21 21:34:39,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-21 21:34:39,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:39,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-21 21:34:39,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:39,078 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:39,100 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:39,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:39,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-21 21:34:39,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277171263] [2020-10-21 21:34:39,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-21 21:34:39,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:39,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-21 21:34:39,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-21 21:34:39,102 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-21 21:34:40,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:40,104 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-10-21 21:34:40,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-21 21:34:40,104 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-21 21:34:40,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:40,105 INFO L225 Difference]: With dead ends: 132 [2020-10-21 21:34:40,106 INFO L226 Difference]: Without dead ends: 123 [2020-10-21 21:34:40,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-10-21 21:34:40,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-21 21:34:40,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 65. [2020-10-21 21:34:40,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-21 21:34:40,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-10-21 21:34:40,110 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 25 [2020-10-21 21:34:40,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:40,110 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-10-21 21:34:40,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-21 21:34:40,110 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-10-21 21:34:40,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-21 21:34:40,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:40,111 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:40,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-21 21:34:40,322 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:40,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:40,322 INFO L82 PathProgramCache]: Analyzing trace with hash 28466153, now seen corresponding path program 40 times [2020-10-21 21:34:40,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:40,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830586164] [2020-10-21 21:34:40,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:40,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830586164] [2020-10-21 21:34:40,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352194330] [2020-10-21 21:34:40,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:34:40,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:34:40,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:40,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-21 21:34:40,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:40,602 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:40,618 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:40,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:40,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-21 21:34:40,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199059818] [2020-10-21 21:34:40,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-21 21:34:40,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:40,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-21 21:34:40,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-21 21:34:40,619 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 22 states. [2020-10-21 21:34:41,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:41,572 INFO L93 Difference]: Finished difference Result 112 states and 273 transitions. [2020-10-21 21:34:41,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-21 21:34:41,573 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-21 21:34:41,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:41,574 INFO L225 Difference]: With dead ends: 112 [2020-10-21 21:34:41,574 INFO L226 Difference]: Without dead ends: 107 [2020-10-21 21:34:41,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-21 21:34:41,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-21 21:34:41,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-10-21 21:34:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-21 21:34:41,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-21 21:34:41,579 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-21 21:34:41,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:41,579 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-21 21:34:41,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-21 21:34:41,579 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-21 21:34:41,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-21 21:34:41,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:41,580 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:41,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-21 21:34:41,790 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:41,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:41,790 INFO L82 PathProgramCache]: Analyzing trace with hash -391352730, now seen corresponding path program 41 times [2020-10-21 21:34:41,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:41,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710787436] [2020-10-21 21:34:41,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:42,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710787436] [2020-10-21 21:34:42,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978200570] [2020-10-21 21:34:42,068 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:34:42,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-21 21:34:42,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:42,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-21 21:34:42,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:42,124 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:42,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:42,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-21 21:34:42,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970759710] [2020-10-21 21:34:42,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-21 21:34:42,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:42,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-21 21:34:42,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-10-21 21:34:42,144 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-21 21:34:42,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:42,619 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-21 21:34:42,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 21:34:42,619 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-21 21:34:42,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:42,620 INFO L225 Difference]: With dead ends: 112 [2020-10-21 21:34:42,621 INFO L226 Difference]: Without dead ends: 106 [2020-10-21 21:34:42,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=540, Invalid=1100, Unknown=0, NotChecked=0, Total=1640 [2020-10-21 21:34:42,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-21 21:34:42,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2020-10-21 21:34:42,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-21 21:34:42,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-10-21 21:34:42,625 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 26 [2020-10-21 21:34:42,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:42,625 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-10-21 21:34:42,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-21 21:34:42,625 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-10-21 21:34:42,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-21 21:34:42,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:42,626 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:42,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:42,837 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:42,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:42,837 INFO L82 PathProgramCache]: Analyzing trace with hash 816306680, now seen corresponding path program 42 times [2020-10-21 21:34:42,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:42,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141092279] [2020-10-21 21:34:42,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:43,041 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:43,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141092279] [2020-10-21 21:34:43,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523783429] [2020-10-21 21:34:43,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:34:43,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-21 21:34:43,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:43,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-21 21:34:43,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:43,129 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:43,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:43,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-21 21:34:43,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341466731] [2020-10-21 21:34:43,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-21 21:34:43,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:43,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-21 21:34:43,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-21 21:34:43,147 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 23 states. [2020-10-21 21:34:44,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:44,229 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-10-21 21:34:44,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-21 21:34:44,230 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-21 21:34:44,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:44,231 INFO L225 Difference]: With dead ends: 133 [2020-10-21 21:34:44,232 INFO L226 Difference]: Without dead ends: 128 [2020-10-21 21:34:44,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-21 21:34:44,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-21 21:34:44,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 69. [2020-10-21 21:34:44,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-21 21:34:44,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-10-21 21:34:44,241 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 26 [2020-10-21 21:34:44,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:44,242 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-10-21 21:34:44,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-21 21:34:44,242 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-10-21 21:34:44,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-21 21:34:44,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:44,243 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:44,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-21 21:34:44,454 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:44,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:44,455 INFO L82 PathProgramCache]: Analyzing trace with hash 882475958, now seen corresponding path program 43 times [2020-10-21 21:34:44,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:44,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752400988] [2020-10-21 21:34:44,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:44,678 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:44,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752400988] [2020-10-21 21:34:44,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589244787] [2020-10-21 21:34:44,679 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 [2020-10-21 21:34:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:44,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-21 21:34:44,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:44,767 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:44,785 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:44,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:44,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-21 21:34:44,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4858315] [2020-10-21 21:34:44,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-21 21:34:44,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:44,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-21 21:34:44,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-21 21:34:44,787 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 23 states. [2020-10-21 21:34:45,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:45,905 INFO L93 Difference]: Finished difference Result 141 states and 335 transitions. [2020-10-21 21:34:45,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-21 21:34:45,906 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-21 21:34:45,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:45,907 INFO L225 Difference]: With dead ends: 141 [2020-10-21 21:34:45,907 INFO L226 Difference]: Without dead ends: 132 [2020-10-21 21:34:45,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-21 21:34:45,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-21 21:34:45,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 89. [2020-10-21 21:34:45,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-21 21:34:45,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-21 21:34:45,911 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 26 [2020-10-21 21:34:45,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:45,912 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-21 21:34:45,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-21 21:34:45,912 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-21 21:34:45,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-21 21:34:45,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:45,912 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:46,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:46,116 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:46,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:46,116 INFO L82 PathProgramCache]: Analyzing trace with hash -464271481, now seen corresponding path program 44 times [2020-10-21 21:34:46,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:46,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979136193] [2020-10-21 21:34:46,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:46,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979136193] [2020-10-21 21:34:46,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831031001] [2020-10-21 21:34:46,372 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 [2020-10-21 21:34:46,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:34:46,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:46,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-21 21:34:46,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:46,494 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:46,521 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:46,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:46,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-21 21:34:46,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815314728] [2020-10-21 21:34:46,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-21 21:34:46,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:46,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-21 21:34:46,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-21 21:34:46,523 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-21 21:34:47,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:47,725 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-10-21 21:34:47,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-21 21:34:47,726 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-21 21:34:47,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:47,727 INFO L225 Difference]: With dead ends: 142 [2020-10-21 21:34:47,727 INFO L226 Difference]: Without dead ends: 133 [2020-10-21 21:34:47,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-10-21 21:34:47,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-21 21:34:47,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 69. [2020-10-21 21:34:47,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-21 21:34:47,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-10-21 21:34:47,731 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 27 [2020-10-21 21:34:47,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:47,731 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-10-21 21:34:47,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-21 21:34:47,731 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-10-21 21:34:47,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-21 21:34:47,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:47,732 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:47,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-21 21:34:47,943 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:47,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:47,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1586979020, now seen corresponding path program 45 times [2020-10-21 21:34:47,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:47,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528587878] [2020-10-21 21:34:47,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:48,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528587878] [2020-10-21 21:34:48,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466558982] [2020-10-21 21:34:48,162 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 [2020-10-21 21:34:48,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-21 21:34:48,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:48,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-21 21:34:48,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:48,252 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:48,273 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:48,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:48,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-21 21:34:48,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012818578] [2020-10-21 21:34:48,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-21 21:34:48,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:48,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-21 21:34:48,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-21 21:34:48,275 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 24 states. [2020-10-21 21:34:49,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:49,432 INFO L93 Difference]: Finished difference Result 120 states and 293 transitions. [2020-10-21 21:34:49,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-21 21:34:49,433 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-21 21:34:49,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:49,433 INFO L225 Difference]: With dead ends: 120 [2020-10-21 21:34:49,434 INFO L226 Difference]: Without dead ends: 115 [2020-10-21 21:34:49,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-21 21:34:49,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-21 21:34:49,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2020-10-21 21:34:49,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-21 21:34:49,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-21 21:34:49,438 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-21 21:34:49,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:49,438 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-21 21:34:49,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-21 21:34:49,438 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-21 21:34:49,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-21 21:34:49,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:49,439 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:49,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:49,648 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:49,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:49,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1867154761, now seen corresponding path program 46 times [2020-10-21 21:34:49,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:49,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828460032] [2020-10-21 21:34:49,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:49,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:49,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828460032] [2020-10-21 21:34:49,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8969153] [2020-10-21 21:34:49,987 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 [2020-10-21 21:34:50,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:34:50,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:50,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-21 21:34:50,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:50,040 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:50,049 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:50,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:50,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-21 21:34:50,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69500425] [2020-10-21 21:34:50,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-21 21:34:50,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:50,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-21 21:34:50,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-10-21 21:34:50,051 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-10-21 21:34:50,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:50,585 INFO L93 Difference]: Finished difference Result 120 states and 291 transitions. [2020-10-21 21:34:50,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-21 21:34:50,586 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-21 21:34:50,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:50,587 INFO L225 Difference]: With dead ends: 120 [2020-10-21 21:34:50,587 INFO L226 Difference]: Without dead ends: 114 [2020-10-21 21:34:50,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=649, Invalid=1331, Unknown=0, NotChecked=0, Total=1980 [2020-10-21 21:34:50,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-21 21:34:50,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2020-10-21 21:34:50,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-21 21:34:50,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 239 transitions. [2020-10-21 21:34:50,591 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 239 transitions. Word has length 28 [2020-10-21 21:34:50,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:50,592 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 239 transitions. [2020-10-21 21:34:50,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-21 21:34:50,592 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 239 transitions. [2020-10-21 21:34:50,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-21 21:34:50,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:50,592 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:50,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-21 21:34:50,801 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:50,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:50,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1507485925, now seen corresponding path program 47 times [2020-10-21 21:34:50,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:50,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924914981] [2020-10-21 21:34:50,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:51,047 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:51,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924914981] [2020-10-21 21:34:51,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167153620] [2020-10-21 21:34:51,047 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 [2020-10-21 21:34:51,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-21 21:34:51,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:51,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-21 21:34:51,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:51,142 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:51,162 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:51,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:51,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-21 21:34:51,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468311080] [2020-10-21 21:34:51,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-21 21:34:51,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:51,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-21 21:34:51,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-10-21 21:34:51,164 INFO L87 Difference]: Start difference. First operand 94 states and 239 transitions. Second operand 25 states. [2020-10-21 21:34:52,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:52,347 INFO L93 Difference]: Finished difference Result 143 states and 341 transitions. [2020-10-21 21:34:52,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-21 21:34:52,348 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-21 21:34:52,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:52,349 INFO L225 Difference]: With dead ends: 143 [2020-10-21 21:34:52,349 INFO L226 Difference]: Without dead ends: 138 [2020-10-21 21:34:52,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-10-21 21:34:52,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-21 21:34:52,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 73. [2020-10-21 21:34:52,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-21 21:34:52,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 177 transitions. [2020-10-21 21:34:52,354 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 177 transitions. Word has length 28 [2020-10-21 21:34:52,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:52,354 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 177 transitions. [2020-10-21 21:34:52,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-21 21:34:52,355 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 177 transitions. [2020-10-21 21:34:52,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-21 21:34:52,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:52,355 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:52,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-21 21:34:52,564 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:52,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:52,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1951734579, now seen corresponding path program 48 times [2020-10-21 21:34:52,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:52,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608766128] [2020-10-21 21:34:52,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:52,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:52,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608766128] [2020-10-21 21:34:52,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823988954] [2020-10-21 21:34:52,800 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 [2020-10-21 21:34:52,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-21 21:34:52,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:52,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-21 21:34:52,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:52,887 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:52,905 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:52,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:52,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-21 21:34:52,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608245775] [2020-10-21 21:34:52,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-21 21:34:52,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:52,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-21 21:34:52,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-10-21 21:34:52,907 INFO L87 Difference]: Start difference. First operand 73 states and 177 transitions. Second operand 25 states. [2020-10-21 21:34:54,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:54,237 INFO L93 Difference]: Finished difference Result 151 states and 359 transitions. [2020-10-21 21:34:54,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-21 21:34:54,238 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-21 21:34:54,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:54,239 INFO L225 Difference]: With dead ends: 151 [2020-10-21 21:34:54,239 INFO L226 Difference]: Without dead ends: 142 [2020-10-21 21:34:54,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1337, Invalid=2953, Unknown=0, NotChecked=0, Total=4290 [2020-10-21 21:34:54,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-21 21:34:54,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 95. [2020-10-21 21:34:54,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-21 21:34:54,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 243 transitions. [2020-10-21 21:34:54,243 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 243 transitions. Word has length 28 [2020-10-21 21:34:54,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:54,243 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 243 transitions. [2020-10-21 21:34:54,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-21 21:34:54,244 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 243 transitions. [2020-10-21 21:34:54,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-21 21:34:54,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:54,244 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:54,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-21 21:34:54,454 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:54,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:54,455 INFO L82 PathProgramCache]: Analyzing trace with hash 512601796, now seen corresponding path program 49 times [2020-10-21 21:34:54,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:54,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668732634] [2020-10-21 21:34:54,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 72 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:54,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668732634] [2020-10-21 21:34:54,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535811065] [2020-10-21 21:34:54,601 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 [2020-10-21 21:34:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:54,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-21 21:34:54,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:54,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-21 21:34:54,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2020-10-21 21:34:54,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571857936] [2020-10-21 21:34:54,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:34:54,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:54,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:34:54,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:34:54,687 INFO L87 Difference]: Start difference. First operand 95 states and 243 transitions. Second operand 13 states. [2020-10-21 21:34:54,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:54,712 INFO L93 Difference]: Finished difference Result 404 states and 979 transitions. [2020-10-21 21:34:54,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 21:34:54,713 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-21 21:34:54,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:54,713 INFO L225 Difference]: With dead ends: 404 [2020-10-21 21:34:54,714 INFO L226 Difference]: Without dead ends: 46 [2020-10-21 21:34:54,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:34:54,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-21 21:34:54,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-21 21:34:54,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-21 21:34:54,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 80 transitions. [2020-10-21 21:34:54,716 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 80 transitions. Word has length 29 [2020-10-21 21:34:54,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:54,716 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 80 transitions. [2020-10-21 21:34:54,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:34:54,716 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 80 transitions. [2020-10-21 21:34:54,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-21 21:34:54,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:54,717 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:54,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-21 21:34:54,924 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:54,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:54,925 INFO L82 PathProgramCache]: Analyzing trace with hash 374257903, now seen corresponding path program 50 times [2020-10-21 21:34:54,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:54,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045404502] [2020-10-21 21:34:54,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:54,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:55,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045404502] [2020-10-21 21:34:55,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959253444] [2020-10-21 21:34:55,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:34:55,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:34:55,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:55,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-21 21:34:55,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:55,135 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:55,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-21 21:34:55,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2020-10-21 21:34:55,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019163441] [2020-10-21 21:34:55,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:34:55,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:55,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:34:55,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-21 21:34:55,136 INFO L87 Difference]: Start difference. First operand 46 states and 80 transitions. Second operand 13 states. [2020-10-21 21:34:55,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:55,158 INFO L93 Difference]: Finished difference Result 151 states and 219 transitions. [2020-10-21 21:34:55,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 21:34:55,160 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-21 21:34:55,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:55,160 INFO L225 Difference]: With dead ends: 151 [2020-10-21 21:34:55,160 INFO L226 Difference]: Without dead ends: 0 [2020-10-21 21:34:55,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-21 21:34:55,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-21 21:34:55,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-21 21:34:55,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-21 21:34:55,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-21 21:34:55,161 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-10-21 21:34:55,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:55,162 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-21 21:34:55,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:34:55,162 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-21 21:34:55,162 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-21 21:34:55,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:55,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 09:34:55 BasicIcfg [2020-10-21 21:34:55,366 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-21 21:34:55,367 INFO L168 Benchmark]: Toolchain (without parser) took 51972.11 ms. Allocated memory was 141.0 MB in the beginning and 481.8 MB in the end (delta: 340.8 MB). Free memory was 103.6 MB in the beginning and 356.2 MB in the end (delta: -252.6 MB). Peak memory consumption was 88.2 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:55,368 INFO L168 Benchmark]: CDTParser took 4.23 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-21 21:34:55,368 INFO L168 Benchmark]: CACSL2BoogieTranslator took 748.91 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 102.6 MB in the beginning and 159.5 MB in the end (delta: -56.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:55,369 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.72 ms. Allocated memory is still 203.4 MB. Free memory was 159.5 MB in the beginning and 157.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:55,369 INFO L168 Benchmark]: Boogie Preprocessor took 26.89 ms. Allocated memory is still 203.4 MB. Free memory was 157.5 MB in the beginning and 156.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:55,369 INFO L168 Benchmark]: RCFGBuilder took 440.18 ms. Allocated memory is still 203.4 MB. Free memory was 155.5 MB in the beginning and 133.5 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:55,370 INFO L168 Benchmark]: TraceAbstraction took 50702.28 ms. Allocated memory was 203.4 MB in the beginning and 481.8 MB in the end (delta: 278.4 MB). Free memory was 133.5 MB in the beginning and 356.2 MB in the end (delta: -222.7 MB). Peak memory consumption was 55.7 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:55,372 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 4.23 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 748.91 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 102.6 MB in the beginning and 159.5 MB in the end (delta: -56.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.72 ms. Allocated memory is still 203.4 MB. Free memory was 159.5 MB in the beginning and 157.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.89 ms. Allocated memory is still 203.4 MB. Free memory was 157.5 MB in the beginning and 156.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 440.18 ms. Allocated memory is still 203.4 MB. Free memory was 155.5 MB in the beginning and 133.5 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 50702.28 ms. Allocated memory was 203.4 MB in the beginning and 481.8 MB in the end (delta: 278.4 MB). Free memory was 133.5 MB in the beginning and 356.2 MB in the end (delta: -222.7 MB). Peak memory consumption was 55.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 785 VarBasedMoverChecksPositive, 19 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 19 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 15 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.9s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 7 FixpointIterations, 16 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 62 TotalNumberOfCompositions, 1187 MoverChecksTotal - PositiveResult [Line: 685]: 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, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 50.5s, OverallIterations: 52, TraceHistogramMax: 11, AutomataDifference: 26.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 882 SDtfs, 3382 SDslu, 3476 SDs, 0 SdLazy, 4172 SolverSat, 2758 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2520 GetRequests, 822 SyntacticMatches, 36 SemanticMatches, 1662 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17528 ImplicationChecksByTransitivity, 25.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=50, 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, 52 MinimizatonAttempts, 1294 StatesRemovedByMinimization, 49 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 8.3s InterpolantComputationTime, 1924 NumberOfCodeBlocks, 1924 NumberOfCodeBlocksAsserted, 233 NumberOfCheckSat, 1825 ConstructedInterpolants, 0 QuantifiedInterpolants, 150101 SizeOfPredicates, 531 NumberOfNonLiveVariables, 6486 ConjunctsInSsa, 740 ConjunctsInUnsatCore, 99 InterpolantComputations, 7 PerfectInterpolantSequences, 362/3520 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...