/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-1d1d2b5 [2020-10-21 22:38:53,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-21 22:38:53,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-21 22:38:53,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-21 22:38:53,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-21 22:38:53,098 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-21 22:38:53,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-21 22:38:53,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-21 22:38:53,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-21 22:38:53,110 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-21 22:38:53,111 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-21 22:38:53,112 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-21 22:38:53,112 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-21 22:38:53,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-21 22:38:53,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-21 22:38:53,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-21 22:38:53,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-21 22:38:53,122 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-21 22:38:53,123 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-21 22:38:53,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-21 22:38:53,134 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-21 22:38:53,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-21 22:38:53,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-21 22:38:53,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-21 22:38:53,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-21 22:38:53,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-21 22:38:53,151 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-21 22:38:53,152 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-21 22:38:53,153 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-21 22:38:53,157 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-21 22:38:53,157 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-21 22:38:53,158 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-21 22:38:53,159 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-21 22:38:53,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-21 22:38:53,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-21 22:38:53,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-21 22:38:53,161 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-21 22:38:53,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-21 22:38:53,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-21 22:38:53,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-21 22:38:53,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-21 22:38:53,165 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-10-21 22:38:53,204 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-21 22:38:53,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-21 22:38:53,206 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-21 22:38:53,206 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-21 22:38:53,206 INFO L138 SettingsManager]: * Use SBE=true [2020-10-21 22:38:53,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-21 22:38:53,207 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-21 22:38:53,207 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-21 22:38:53,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-21 22:38:53,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-21 22:38:53,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-21 22:38:53,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-21 22:38:53,209 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-21 22:38:53,209 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-21 22:38:53,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-21 22:38:53,210 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-21 22:38:53,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-21 22:38:53,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-21 22:38:53,210 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-21 22:38:53,210 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-21 22:38:53,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-21 22:38:53,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-21 22:38:53,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-21 22:38:53,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-21 22:38:53,211 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-21 22:38:53,212 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-21 22:38:53,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-21 22:38:53,212 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-21 22:38:53,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-21 22:38:53,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-21 22:38:53,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-21 22:38:53,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-21 22:38:53,553 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-21 22:38:53,553 INFO L275 PluginConnector]: CDTParser initialized [2020-10-21 22:38:53,554 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-10-21 22:38:53,626 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/980f73f9e/f80f2a2768bf41579d1fce9f4ccb916e/FLAGcbca79a6b [2020-10-21 22:38:54,160 INFO L306 CDTParser]: Found 1 translation units. [2020-10-21 22:38:54,160 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-10-21 22:38:54,177 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/980f73f9e/f80f2a2768bf41579d1fce9f4ccb916e/FLAGcbca79a6b [2020-10-21 22:38:54,460 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/980f73f9e/f80f2a2768bf41579d1fce9f4ccb916e [2020-10-21 22:38:54,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-21 22:38:54,476 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-21 22:38:54,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-21 22:38:54,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-21 22:38:54,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-21 22:38:54,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 10:38:54" (1/1) ... [2020-10-21 22:38:54,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3172d0cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:38:54, skipping insertion in model container [2020-10-21 22:38:54,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 10:38:54" (1/1) ... [2020-10-21 22:38:54,495 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-21 22:38:54,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-21 22:38:55,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 22:38:55,146 INFO L203 MainTranslator]: Completed pre-run [2020-10-21 22:38:55,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 22:38:55,265 INFO L208 MainTranslator]: Completed translation [2020-10-21 22:38:55,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:38:55 WrapperNode [2020-10-21 22:38:55,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-21 22:38:55,267 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-21 22:38:55,267 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-21 22:38:55,267 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-21 22:38:55,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:38:55" (1/1) ... [2020-10-21 22:38:55,292 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:38:55" (1/1) ... [2020-10-21 22:38:55,315 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-21 22:38:55,315 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-21 22:38:55,315 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-21 22:38:55,315 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-21 22:38:55,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:38:55" (1/1) ... [2020-10-21 22:38:55,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:38:55" (1/1) ... [2020-10-21 22:38:55,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:38:55" (1/1) ... [2020-10-21 22:38:55,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:38:55" (1/1) ... [2020-10-21 22:38:55,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:38:55" (1/1) ... [2020-10-21 22:38:55,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:38:55" (1/1) ... [2020-10-21 22:38:55,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:38:55" (1/1) ... [2020-10-21 22:38:55,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-21 22:38:55,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-21 22:38:55,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-21 22:38:55,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-21 22:38:55,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:38:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-21 22:38:55,410 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-21 22:38:55,411 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-21 22:38:55,411 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-21 22:38:55,411 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-21 22:38:55,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-21 22:38:55,411 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-21 22:38:55,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-21 22:38:55,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-21 22:38:55,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-21 22:38:55,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-21 22:38:55,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-21 22:38:55,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-21 22:38:55,414 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 22:38:55,766 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-21 22:38:55,766 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-21 22:38:55,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 10:38:55 BoogieIcfgContainer [2020-10-21 22:38:55,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-21 22:38:55,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-21 22:38:55,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-21 22:38:55,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-21 22:38:55,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 10:38:54" (1/3) ... [2020-10-21 22:38:55,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de16a2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 10:38:55, skipping insertion in model container [2020-10-21 22:38:55,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:38:55" (2/3) ... [2020-10-21 22:38:55,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de16a2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 10:38:55, skipping insertion in model container [2020-10-21 22:38:55,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 10:38:55" (3/3) ... [2020-10-21 22:38:55,780 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2020-10-21 22:38:55,792 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-21 22:38:55,792 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-21 22:38:55,800 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-21 22:38:55,801 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-21 22:38:55,829 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,829 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,829 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,830 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,830 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,830 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,831 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,831 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,831 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,832 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,832 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,832 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,833 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,833 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,833 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,834 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,834 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,834 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,834 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,835 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,835 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,835 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,836 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,836 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,836 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,837 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,837 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,837 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,841 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,841 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,841 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,842 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,842 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,842 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,849 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,849 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,850 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,850 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,850 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,850 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:55,852 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-21 22:38:55,867 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-21 22:38:55,885 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-21 22:38:55,885 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-21 22:38:55,885 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-21 22:38:55,886 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-21 22:38:55,886 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-21 22:38:55,886 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-21 22:38:55,886 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-21 22:38:55,886 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-21 22:38:55,898 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-21 22:38:55,899 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-10-21 22:38:55,901 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-10-21 22:38:55,903 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-10-21 22:38:55,953 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-10-21 22:38:55,954 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-21 22:38:55,960 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 22:38:55,963 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-10-21 22:38:56,869 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-21 22:38:57,306 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-21 22:38:57,693 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-21 22:38:57,827 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-21 22:38:57,850 INFO L131 LiptonReduction]: Checked pairs total: 1187 [2020-10-21 22:38:57,850 INFO L133 LiptonReduction]: Total number of compositions: 62 [2020-10-21 22:38:57,857 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-21 22:38:57,869 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-21 22:38:57,871 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-21 22:38:57,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-21 22:38:57,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:57,879 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-21 22:38:57,880 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:57,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:57,886 INFO L82 PathProgramCache]: Analyzing trace with hash -805875314, now seen corresponding path program 1 times [2020-10-21 22:38:57,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:57,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043114857] [2020-10-21 22:38:57,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:58,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:58,155 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 22:38:58,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043114857] [2020-10-21 22:38:58,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 22:38:58,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-21 22:38:58,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624935258] [2020-10-21 22:38:58,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-21 22:38:58,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:58,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-21 22:38:58,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-21 22:38:58,181 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-21 22:38:58,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:58,260 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-21 22:38:58,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-21 22:38:58,262 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-21 22:38:58,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:58,274 INFO L225 Difference]: With dead ends: 75 [2020-10-21 22:38:58,275 INFO L226 Difference]: Without dead ends: 42 [2020-10-21 22:38:58,276 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 22:38:58,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-21 22:38:58,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-21 22:38:58,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-21 22:38:58,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-21 22:38:58,321 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-21 22:38:58,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:58,322 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-21 22:38:58,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-21 22:38:58,322 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-21 22:38:58,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-21 22:38:58,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:58,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:58,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-21 22:38:58,324 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:58,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:58,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1351909113, now seen corresponding path program 1 times [2020-10-21 22:38:58,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:58,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766318004] [2020-10-21 22:38:58,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:58,441 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 22:38:58,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766318004] [2020-10-21 22:38:58,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 22:38:58,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-21 22:38:58,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701228057] [2020-10-21 22:38:58,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-21 22:38:58,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:58,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-21 22:38:58,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-21 22:38:58,445 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-21 22:38:58,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:58,490 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-21 22:38:58,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-21 22:38:58,491 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-21 22:38:58,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:58,492 INFO L225 Difference]: With dead ends: 56 [2020-10-21 22:38:58,493 INFO L226 Difference]: Without dead ends: 50 [2020-10-21 22:38:58,494 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 22:38:58,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-21 22:38:58,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-21 22:38:58,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-21 22:38:58,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-21 22:38:58,502 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-21 22:38:58,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:58,503 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-21 22:38:58,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-21 22:38:58,504 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-21 22:38:58,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 22:38:58,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:58,505 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:58,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-21 22:38:58,505 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:58,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:58,506 INFO L82 PathProgramCache]: Analyzing trace with hash 2021583950, now seen corresponding path program 1 times [2020-10-21 22:38:58,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:58,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068136472] [2020-10-21 22:38:58,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:58,627 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 22:38:58,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068136472] [2020-10-21 22:38:58,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 22:38:58,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 22:38:58,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819143727] [2020-10-21 22:38:58,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 22:38:58,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:58,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 22:38:58,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-21 22:38:58,630 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-21 22:38:58,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:58,712 INFO L93 Difference]: Finished difference Result 54 states and 124 transitions. [2020-10-21 22:38:58,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 22:38:58,713 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 22:38:58,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:58,714 INFO L225 Difference]: With dead ends: 54 [2020-10-21 22:38:58,714 INFO L226 Difference]: Without dead ends: 47 [2020-10-21 22:38:58,715 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 22:38:58,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-21 22:38:58,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-21 22:38:58,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-21 22:38:58,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 106 transitions. [2020-10-21 22:38:58,723 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 106 transitions. Word has length 10 [2020-10-21 22:38:58,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:58,723 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 106 transitions. [2020-10-21 22:38:58,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 22:38:58,724 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 106 transitions. [2020-10-21 22:38:58,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 22:38:58,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:58,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:58,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-21 22:38:58,725 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:58,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:58,726 INFO L82 PathProgramCache]: Analyzing trace with hash 2101929440, now seen corresponding path program 2 times [2020-10-21 22:38:58,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:58,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590295233] [2020-10-21 22:38:58,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:58,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:58,809 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 22:38:58,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590295233] [2020-10-21 22:38:58,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 22:38:58,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 22:38:58,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390980323] [2020-10-21 22:38:58,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 22:38:58,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:58,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 22:38:58,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-21 22:38:58,812 INFO L87 Difference]: Start difference. First operand 45 states and 106 transitions. Second operand 6 states. [2020-10-21 22:38:58,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:58,894 INFO L93 Difference]: Finished difference Result 59 states and 138 transitions. [2020-10-21 22:38:58,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 22:38:58,895 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 22:38:58,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:58,897 INFO L225 Difference]: With dead ends: 59 [2020-10-21 22:38:58,897 INFO L226 Difference]: Without dead ends: 53 [2020-10-21 22:38:58,897 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 22:38:58,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-21 22:38:58,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2020-10-21 22:38:58,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-21 22:38:58,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 96 transitions. [2020-10-21 22:38:58,908 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 96 transitions. Word has length 10 [2020-10-21 22:38:58,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:58,908 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 96 transitions. [2020-10-21 22:38:58,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 22:38:58,909 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 96 transitions. [2020-10-21 22:38:58,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 22:38:58,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:58,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:58,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-21 22:38:58,911 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:58,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:58,912 INFO L82 PathProgramCache]: Analyzing trace with hash 2082353870, now seen corresponding path program 3 times [2020-10-21 22:38:58,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:58,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609785492] [2020-10-21 22:38:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:59,028 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 22:38:59,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609785492] [2020-10-21 22:38:59,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 22:38:59,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 22:38:59,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000717185] [2020-10-21 22:38:59,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 22:38:59,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:59,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 22:38:59,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-21 22:38:59,031 INFO L87 Difference]: Start difference. First operand 41 states and 96 transitions. Second operand 6 states. [2020-10-21 22:38:59,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:59,121 INFO L93 Difference]: Finished difference Result 65 states and 152 transitions. [2020-10-21 22:38:59,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 22:38:59,122 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 22:38:59,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:59,123 INFO L225 Difference]: With dead ends: 65 [2020-10-21 22:38:59,124 INFO L226 Difference]: Without dead ends: 52 [2020-10-21 22:38:59,124 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 22:38:59,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-21 22:38:59,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2020-10-21 22:38:59,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-21 22:38:59,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 99 transitions. [2020-10-21 22:38:59,130 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 99 transitions. Word has length 10 [2020-10-21 22:38:59,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:59,131 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 99 transitions. [2020-10-21 22:38:59,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 22:38:59,131 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 99 transitions. [2020-10-21 22:38:59,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:38:59,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:59,132 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:59,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-21 22:38:59,132 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:59,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:59,133 INFO L82 PathProgramCache]: Analyzing trace with hash 735328415, now seen corresponding path program 4 times [2020-10-21 22:38:59,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:59,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24587785] [2020-10-21 22:38:59,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:59,187 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 22:38:59,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24587785] [2020-10-21 22:38:59,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817574795] [2020-10-21 22:38:59,188 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 22:38:59,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:38:59,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:59,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 22:38:59,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:59,340 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:38:59,364 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 22:38:59,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:59,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-21 22:38:59,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312979637] [2020-10-21 22:38:59,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 22:38:59,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:59,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 22:38:59,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-21 22:38:59,367 INFO L87 Difference]: Start difference. First operand 41 states and 99 transitions. Second operand 8 states. [2020-10-21 22:38:59,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:59,540 INFO L93 Difference]: Finished difference Result 63 states and 147 transitions. [2020-10-21 22:38:59,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 22:38:59,540 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-21 22:38:59,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:59,541 INFO L225 Difference]: With dead ends: 63 [2020-10-21 22:38:59,542 INFO L226 Difference]: Without dead ends: 54 [2020-10-21 22:38:59,542 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 22:38:59,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-21 22:38:59,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-10-21 22:38:59,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-21 22:38:59,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 87 transitions. [2020-10-21 22:38:59,548 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 87 transitions. Word has length 11 [2020-10-21 22:38:59,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:59,549 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 87 transitions. [2020-10-21 22:38:59,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 22:38:59,549 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 87 transitions. [2020-10-21 22:38:59,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:38:59,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:59,550 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:59,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-21 22:38:59,765 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:59,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:59,765 INFO L82 PathProgramCache]: Analyzing trace with hash 128488628, now seen corresponding path program 5 times [2020-10-21 22:38:59,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:59,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218547834] [2020-10-21 22:38:59,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:59,822 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 22:38:59,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218547834] [2020-10-21 22:38:59,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95367201] [2020-10-21 22:38:59,823 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 22:38:59,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:38:59,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:59,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 22:38:59,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:59,913 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:38:59,923 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 22:38:59,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:59,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-21 22:38:59,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908069084] [2020-10-21 22:38:59,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 22:38:59,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:59,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 22:38:59,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-21 22:38:59,925 INFO L87 Difference]: Start difference. First operand 37 states and 87 transitions. Second operand 8 states. [2020-10-21 22:39:00,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:00,040 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-10-21 22:39:00,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-21 22:39:00,042 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-21 22:39:00,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:00,043 INFO L225 Difference]: With dead ends: 56 [2020-10-21 22:39:00,043 INFO L226 Difference]: Without dead ends: 51 [2020-10-21 22:39:00,043 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 22:39:00,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-21 22:39:00,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-10-21 22:39:00,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-21 22:39:00,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-21 22:39:00,053 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-21 22:39:00,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:00,053 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-21 22:39:00,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 22:39:00,054 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-21 22:39:00,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:39:00,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:00,056 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:00,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:00,258 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:00,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:00,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1416964401, now seen corresponding path program 6 times [2020-10-21 22:39:00,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:00,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984659180] [2020-10-21 22:39:00,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:00,359 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 22:39:00,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984659180] [2020-10-21 22:39:00,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611232307] [2020-10-21 22:39:00,360 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 22:39:00,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 22:39:00,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:00,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:39:00,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:00,458 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:00,472 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 22:39:00,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:00,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-21 22:39:00,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540586396] [2020-10-21 22:39:00,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 22:39:00,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:00,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 22:39:00,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-21 22:39:00,474 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-21 22:39:00,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:00,592 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-10-21 22:39:00,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 22:39:00,592 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-21 22:39:00,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:00,593 INFO L225 Difference]: With dead ends: 56 [2020-10-21 22:39:00,593 INFO L226 Difference]: Without dead ends: 50 [2020-10-21 22:39:00,594 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 22:39:00,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-21 22:39:00,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-10-21 22:39:00,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-21 22:39:00,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-21 22:39:00,599 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-10-21 22:39:00,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:00,599 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-21 22:39:00,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 22:39:00,599 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-21 22:39:00,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:39:00,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:00,600 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:00,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:00,813 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:00,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:00,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1320372483, now seen corresponding path program 7 times [2020-10-21 22:39:00,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:00,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616129014] [2020-10-21 22:39:00,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:00,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:00,872 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 22:39:00,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616129014] [2020-10-21 22:39:00,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448614629] [2020-10-21 22:39:00,873 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 22:39:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:00,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 22:39:00,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:00,956 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:00,968 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 22:39:00,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:00,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-21 22:39:00,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669284172] [2020-10-21 22:39:00,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 22:39:00,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:00,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 22:39:00,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-21 22:39:00,970 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 9 states. [2020-10-21 22:39:01,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:01,172 INFO L93 Difference]: Finished difference Result 63 states and 149 transitions. [2020-10-21 22:39:01,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-21 22:39:01,173 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-21 22:39:01,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:01,174 INFO L225 Difference]: With dead ends: 63 [2020-10-21 22:39:01,174 INFO L226 Difference]: Without dead ends: 58 [2020-10-21 22:39:01,175 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 22:39:01,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-21 22:39:01,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-10-21 22:39:01,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-21 22:39:01,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-10-21 22:39:01,180 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 12 [2020-10-21 22:39:01,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:01,181 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-10-21 22:39:01,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 22:39:01,181 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-10-21 22:39:01,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:39:01,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:01,182 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:01,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:01,396 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:01,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:01,396 INFO L82 PathProgramCache]: Analyzing trace with hash -311794613, now seen corresponding path program 8 times [2020-10-21 22:39:01,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:01,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720682833] [2020-10-21 22:39:01,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:01,475 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 22:39:01,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720682833] [2020-10-21 22:39:01,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134345615] [2020-10-21 22:39:01,476 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 22:39:01,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:39:01,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:01,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 22:39:01,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:01,561 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:39:01,570 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 22:39:01,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:01,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-21 22:39:01,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907126223] [2020-10-21 22:39:01,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 22:39:01,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:01,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 22:39:01,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-21 22:39:01,573 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 9 states. [2020-10-21 22:39:01,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:01,784 INFO L93 Difference]: Finished difference Result 71 states and 167 transitions. [2020-10-21 22:39:01,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 22:39:01,784 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-21 22:39:01,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:01,785 INFO L225 Difference]: With dead ends: 71 [2020-10-21 22:39:01,785 INFO L226 Difference]: Without dead ends: 62 [2020-10-21 22:39:01,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-10-21 22:39:01,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-21 22:39:01,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2020-10-21 22:39:01,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-21 22:39:01,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-21 22:39:01,797 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 12 [2020-10-21 22:39:01,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:01,798 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-21 22:39:01,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 22:39:01,798 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-21 22:39:01,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:39:01,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:01,801 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:02,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-21 22:39:02,014 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:02,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:02,015 INFO L82 PathProgramCache]: Analyzing trace with hash -2018100772, now seen corresponding path program 9 times [2020-10-21 22:39:02,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:02,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211480444] [2020-10-21 22:39:02,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:02,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:02,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211480444] [2020-10-21 22:39:02,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503888058] [2020-10-21 22:39:02,080 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 22:39:02,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-21 22:39:02,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:02,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:39:02,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:02,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:39:02,191 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 22:39:02,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:02,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-21 22:39:02,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845140464] [2020-10-21 22:39:02,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 22:39:02,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:02,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 22:39:02,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-21 22:39:02,193 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-21 22:39:02,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:02,472 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-10-21 22:39:02,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 22:39:02,473 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-21 22:39:02,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:02,474 INFO L225 Difference]: With dead ends: 72 [2020-10-21 22:39:02,474 INFO L226 Difference]: Without dead ends: 63 [2020-10-21 22:39:02,474 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 22:39:02,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-21 22:39:02,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-10-21 22:39:02,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-21 22:39:02,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-10-21 22:39:02,479 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 13 [2020-10-21 22:39:02,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:02,479 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-10-21 22:39:02,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 22:39:02,479 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-10-21 22:39:02,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:39:02,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:02,480 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:02,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:02,691 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:02,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:02,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1075670313, now seen corresponding path program 10 times [2020-10-21 22:39:02,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:02,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402657893] [2020-10-21 22:39:02,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:02,755 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 22:39:02,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402657893] [2020-10-21 22:39:02,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786293531] [2020-10-21 22:39:02,756 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 22:39:02,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:39:02,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:02,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:39:02,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:02,873 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:02,889 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 22:39:02,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:02,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-21 22:39:02,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465664079] [2020-10-21 22:39:02,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 22:39:02,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:02,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 22:39:02,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-21 22:39:02,892 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 10 states. [2020-10-21 22:39:03,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:03,098 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-10-21 22:39:03,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-21 22:39:03,099 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-21 22:39:03,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:03,100 INFO L225 Difference]: With dead ends: 64 [2020-10-21 22:39:03,100 INFO L226 Difference]: Without dead ends: 59 [2020-10-21 22:39:03,100 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 22:39:03,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-21 22:39:03,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-10-21 22:39:03,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-21 22:39:03,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-21 22:39:03,105 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-21 22:39:03,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:03,105 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-21 22:39:03,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 22:39:03,105 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-21 22:39:03,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 22:39:03,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:03,106 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:03,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:03,318 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:03,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:03,319 INFO L82 PathProgramCache]: Analyzing trace with hash 198162772, now seen corresponding path program 11 times [2020-10-21 22:39:03,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:03,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554445086] [2020-10-21 22:39:03,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:03,413 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 22:39:03,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554445086] [2020-10-21 22:39:03,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351993629] [2020-10-21 22:39:03,414 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 22:39:03,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 22:39:03,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:03,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 22:39:03,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:03,482 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:03,505 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 22:39:03,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:03,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-21 22:39:03,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028240090] [2020-10-21 22:39:03,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 22:39:03,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:03,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 22:39:03,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-21 22:39:03,508 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-21 22:39:03,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:03,661 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-10-21 22:39:03,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 22:39:03,662 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-21 22:39:03,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:03,663 INFO L225 Difference]: With dead ends: 64 [2020-10-21 22:39:03,663 INFO L226 Difference]: Without dead ends: 58 [2020-10-21 22:39:03,663 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 22:39:03,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-21 22:39:03,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-10-21 22:39:03,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-21 22:39:03,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-21 22:39:03,668 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 14 [2020-10-21 22:39:03,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:03,668 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-21 22:39:03,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 22:39:03,668 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-21 22:39:03,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 22:39:03,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:03,669 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:03,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-21 22:39:03,870 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:03,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:03,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1863413606, now seen corresponding path program 12 times [2020-10-21 22:39:03,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:03,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879231149] [2020-10-21 22:39:03,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:03,937 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 22:39:03,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879231149] [2020-10-21 22:39:03,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725167881] [2020-10-21 22:39:03,938 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 22:39:03,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-21 22:39:03,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:03,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:39:03,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:04,018 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:04,028 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 22:39:04,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:04,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-21 22:39:04,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967914392] [2020-10-21 22:39:04,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 22:39:04,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:04,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 22:39:04,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-21 22:39:04,032 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 11 states. [2020-10-21 22:39:04,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:04,318 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-21 22:39:04,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-21 22:39:04,319 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-21 22:39:04,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:04,320 INFO L225 Difference]: With dead ends: 73 [2020-10-21 22:39:04,320 INFO L226 Difference]: Without dead ends: 68 [2020-10-21 22:39:04,321 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 22:39:04,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-21 22:39:04,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2020-10-21 22:39:04,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-21 22:39:04,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-10-21 22:39:04,327 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 14 [2020-10-21 22:39:04,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:04,328 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-10-21 22:39:04,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 22:39:04,329 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-10-21 22:39:04,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 22:39:04,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:04,330 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:04,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:04,531 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:04,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:04,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1013983880, now seen corresponding path program 13 times [2020-10-21 22:39:04,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:04,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369386246] [2020-10-21 22:39:04,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:04,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:04,620 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 22:39:04,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369386246] [2020-10-21 22:39:04,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851336690] [2020-10-21 22:39:04,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:39:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:04,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:39:04,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:04,694 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:39:04,709 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 22:39:04,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:04,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-21 22:39:04,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123247457] [2020-10-21 22:39:04,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 22:39:04,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:04,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 22:39:04,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-21 22:39:04,711 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 11 states. [2020-10-21 22:39:05,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:05,042 INFO L93 Difference]: Finished difference Result 81 states and 191 transitions. [2020-10-21 22:39:05,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-21 22:39:05,043 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-21 22:39:05,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:05,044 INFO L225 Difference]: With dead ends: 81 [2020-10-21 22:39:05,044 INFO L226 Difference]: Without dead ends: 72 [2020-10-21 22:39:05,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-10-21 22:39:05,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-21 22:39:05,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-10-21 22:39:05,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-21 22:39:05,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-21 22:39:05,048 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 14 [2020-10-21 22:39:05,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:05,048 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-21 22:39:05,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 22:39:05,049 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-21 22:39:05,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-21 22:39:05,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:05,049 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:05,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-21 22:39:05,251 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:05,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:05,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1931272153, now seen corresponding path program 14 times [2020-10-21 22:39:05,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:05,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2246127] [2020-10-21 22:39:05,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:05,325 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 22:39:05,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2246127] [2020-10-21 22:39:05,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768808650] [2020-10-21 22:39:05,326 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 22:39:05,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:39:05,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:05,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-21 22:39:05,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:05,417 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 22:39:05,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:05,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-21 22:39:05,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544159675] [2020-10-21 22:39:05,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-21 22:39:05,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:05,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-21 22:39:05,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-21 22:39:05,420 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-21 22:39:05,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:05,811 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-10-21 22:39:05,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 22:39:05,812 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-21 22:39:05,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:05,813 INFO L225 Difference]: With dead ends: 82 [2020-10-21 22:39:05,813 INFO L226 Difference]: Without dead ends: 73 [2020-10-21 22:39:05,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-21 22:39:05,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-21 22:39:05,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2020-10-21 22:39:05,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-21 22:39:05,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-10-21 22:39:05,817 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 15 [2020-10-21 22:39:05,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:05,817 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-10-21 22:39:05,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-21 22:39:05,818 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-10-21 22:39:05,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-21 22:39:05,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:05,818 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:06,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-21 22:39:06,029 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:06,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:06,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1368757306, now seen corresponding path program 15 times [2020-10-21 22:39:06,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:06,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437856485] [2020-10-21 22:39:06,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:06,120 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 22:39:06,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437856485] [2020-10-21 22:39:06,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605685015] [2020-10-21 22:39:06,121 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 22:39:06,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-21 22:39:06,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:06,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 22:39:06,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:06,211 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:06,223 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 22:39:06,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:06,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-21 22:39:06,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477118699] [2020-10-21 22:39:06,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-21 22:39:06,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:06,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-21 22:39:06,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-21 22:39:06,226 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 12 states. [2020-10-21 22:39:06,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:06,520 INFO L93 Difference]: Finished difference Result 72 states and 173 transitions. [2020-10-21 22:39:06,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-21 22:39:06,520 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-21 22:39:06,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:06,522 INFO L225 Difference]: With dead ends: 72 [2020-10-21 22:39:06,522 INFO L226 Difference]: Without dead ends: 67 [2020-10-21 22:39:06,523 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 22:39:06,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-21 22:39:06,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-10-21 22:39:06,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-21 22:39:06,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-21 22:39:06,526 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-21 22:39:06,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:06,527 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-21 22:39:06,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-21 22:39:06,527 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-21 22:39:06,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-21 22:39:06,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:06,527 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:06,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-21 22:39:06,739 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:06,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:06,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1455869111, now seen corresponding path program 16 times [2020-10-21 22:39:06,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:06,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092827718] [2020-10-21 22:39:06,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:06,841 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 22:39:06,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092827718] [2020-10-21 22:39:06,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324058279] [2020-10-21 22:39:06,842 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 22:39:06,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:39:06,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:06,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-21 22:39:06,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:06,899 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:06,916 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 22:39:06,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:06,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-21 22:39:06,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905090442] [2020-10-21 22:39:06,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-21 22:39:06,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:06,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-21 22:39:06,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-21 22:39:06,918 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-21 22:39:07,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:07,088 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-10-21 22:39:07,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 22:39:07,089 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-21 22:39:07,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:07,090 INFO L225 Difference]: With dead ends: 72 [2020-10-21 22:39:07,090 INFO L226 Difference]: Without dead ends: 66 [2020-10-21 22:39:07,091 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 22:39:07,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-21 22:39:07,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-10-21 22:39:07,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-21 22:39:07,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-21 22:39:07,094 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 16 [2020-10-21 22:39:07,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:07,095 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-21 22:39:07,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-21 22:39:07,095 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-21 22:39:07,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-21 22:39:07,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:07,095 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:07,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-21 22:39:07,300 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:07,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:07,300 INFO L82 PathProgramCache]: Analyzing trace with hash -260077303, now seen corresponding path program 17 times [2020-10-21 22:39:07,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:07,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787936728] [2020-10-21 22:39:07,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:07,382 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 22:39:07,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787936728] [2020-10-21 22:39:07,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125348556] [2020-10-21 22:39:07,383 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 22:39:07,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-21 22:39:07,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:07,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-21 22:39:07,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:07,470 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:07,485 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 22:39:07,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:07,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-21 22:39:07,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686749084] [2020-10-21 22:39:07,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:39:07,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:07,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:39:07,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:39:07,487 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 13 states. [2020-10-21 22:39:07,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:07,845 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-21 22:39:07,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-21 22:39:07,846 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-21 22:39:07,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:07,847 INFO L225 Difference]: With dead ends: 83 [2020-10-21 22:39:07,847 INFO L226 Difference]: Without dead ends: 78 [2020-10-21 22:39:07,848 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 22:39:07,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-21 22:39:07,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2020-10-21 22:39:07,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-21 22:39:07,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-10-21 22:39:07,851 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 16 [2020-10-21 22:39:07,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:07,851 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-10-21 22:39:07,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:39:07,851 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-10-21 22:39:07,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-21 22:39:07,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:07,852 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:08,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:08,061 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:08,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:08,061 INFO L82 PathProgramCache]: Analyzing trace with hash -518171259, now seen corresponding path program 18 times [2020-10-21 22:39:08,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:08,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634243752] [2020-10-21 22:39:08,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:08,161 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 22:39:08,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634243752] [2020-10-21 22:39:08,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118856490] [2020-10-21 22:39:08,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:39:08,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-21 22:39:08,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:08,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-21 22:39:08,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:08,261 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 22:39:08,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:08,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-21 22:39:08,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117854717] [2020-10-21 22:39:08,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:39:08,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:08,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:39:08,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:39:08,263 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 13 states. [2020-10-21 22:39:08,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:08,581 INFO L93 Difference]: Finished difference Result 91 states and 215 transitions. [2020-10-21 22:39:08,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 22:39:08,582 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-21 22:39:08,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:08,583 INFO L225 Difference]: With dead ends: 91 [2020-10-21 22:39:08,584 INFO L226 Difference]: Without dead ends: 82 [2020-10-21 22:39:08,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-10-21 22:39:08,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-21 22:39:08,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2020-10-21 22:39:08,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-21 22:39:08,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-21 22:39:08,587 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 16 [2020-10-21 22:39:08,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:08,587 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-21 22:39:08,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:39:08,588 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-21 22:39:08,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-21 22:39:08,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:08,588 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:08,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:08,791 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:08,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:08,791 INFO L82 PathProgramCache]: Analyzing trace with hash 527563414, now seen corresponding path program 19 times [2020-10-21 22:39:08,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:08,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270333532] [2020-10-21 22:39:08,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:08,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:08,875 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 22:39:08,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270333532] [2020-10-21 22:39:08,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828503308] [2020-10-21 22:39:08,875 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 22:39:08,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:08,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-21 22:39:08,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:08,962 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:39:08,974 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 22:39:08,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:08,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-21 22:39:08,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775372209] [2020-10-21 22:39:08,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 22:39:08,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:08,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 22:39:08,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-21 22:39:08,976 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-21 22:39:09,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:09,471 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-21 22:39:09,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 22:39:09,471 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-21 22:39:09,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:09,472 INFO L225 Difference]: With dead ends: 92 [2020-10-21 22:39:09,472 INFO L226 Difference]: Without dead ends: 83 [2020-10-21 22:39:09,473 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 22:39:09,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-21 22:39:09,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2020-10-21 22:39:09,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-21 22:39:09,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-10-21 22:39:09,476 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 17 [2020-10-21 22:39:09,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:09,476 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-10-21 22:39:09,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 22:39:09,476 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-10-21 22:39:09,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-21 22:39:09,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:09,477 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:09,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:09,678 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:09,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:09,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1116588253, now seen corresponding path program 20 times [2020-10-21 22:39:09,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:09,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506854882] [2020-10-21 22:39:09,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:09,767 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 22:39:09,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506854882] [2020-10-21 22:39:09,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063417782] [2020-10-21 22:39:09,768 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 22:39:09,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:39:09,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:09,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-21 22:39:09,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:09,868 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 22:39:09,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:09,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-21 22:39:09,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21395474] [2020-10-21 22:39:09,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 22:39:09,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:09,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 22:39:09,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-21 22:39:09,870 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 14 states. [2020-10-21 22:39:10,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:10,315 INFO L93 Difference]: Finished difference Result 80 states and 193 transitions. [2020-10-21 22:39:10,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-21 22:39:10,315 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-21 22:39:10,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:10,316 INFO L225 Difference]: With dead ends: 80 [2020-10-21 22:39:10,316 INFO L226 Difference]: Without dead ends: 75 [2020-10-21 22:39:10,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=322, Invalid=734, Unknown=0, NotChecked=0, Total=1056 [2020-10-21 22:39:10,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-21 22:39:10,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-10-21 22:39:10,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-21 22:39:10,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-21 22:39:10,320 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-21 22:39:10,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:10,320 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-21 22:39:10,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 22:39:10,320 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-21 22:39:10,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-21 22:39:10,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:10,321 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:10,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-21 22:39:10,526 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:10,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:10,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1069116582, now seen corresponding path program 21 times [2020-10-21 22:39:10,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:10,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446674107] [2020-10-21 22:39:10,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:10,675 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 22:39:10,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446674107] [2020-10-21 22:39:10,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986422241] [2020-10-21 22:39:10,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:39:10,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-21 22:39:10,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:10,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-21 22:39:10,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:10,737 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:10,771 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 22:39:10,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:10,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-21 22:39:10,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688387249] [2020-10-21 22:39:10,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 22:39:10,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:10,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 22:39:10,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-10-21 22:39:10,773 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-21 22:39:11,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:11,026 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-21 22:39:11,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 22:39:11,028 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-21 22:39:11,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:11,029 INFO L225 Difference]: With dead ends: 80 [2020-10-21 22:39:11,029 INFO L226 Difference]: Without dead ends: 74 [2020-10-21 22:39:11,030 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 22:39:11,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-21 22:39:11,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-10-21 22:39:11,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-21 22:39:11,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-21 22:39:11,032 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-10-21 22:39:11,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:11,033 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-21 22:39:11,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 22:39:11,033 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-21 22:39:11,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-21 22:39:11,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:11,033 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:11,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-21 22:39:11,242 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:11,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:11,242 INFO L82 PathProgramCache]: Analyzing trace with hash -825375252, now seen corresponding path program 22 times [2020-10-21 22:39:11,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:11,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357182341] [2020-10-21 22:39:11,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:11,349 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 22:39:11,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357182341] [2020-10-21 22:39:11,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575724660] [2020-10-21 22:39:11,350 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 22:39:11,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:39:11,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:11,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-21 22:39:11,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:11,424 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:11,435 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 22:39:11,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:11,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-21 22:39:11,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225084038] [2020-10-21 22:39:11,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:39:11,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:11,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:39:11,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:39:11,437 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 15 states. [2020-10-21 22:39:11,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:11,932 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-21 22:39:11,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-21 22:39:11,933 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-21 22:39:11,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:11,933 INFO L225 Difference]: With dead ends: 93 [2020-10-21 22:39:11,934 INFO L226 Difference]: Without dead ends: 88 [2020-10-21 22:39:11,934 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 22:39:11,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-21 22:39:11,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 53. [2020-10-21 22:39:11,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-21 22:39:11,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-10-21 22:39:11,937 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 18 [2020-10-21 22:39:11,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:11,938 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-10-21 22:39:11,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:39:11,938 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-10-21 22:39:11,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-21 22:39:11,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:11,939 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:12,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-21 22:39:12,139 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:12,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:12,139 INFO L82 PathProgramCache]: Analyzing trace with hash 254522690, now seen corresponding path program 23 times [2020-10-21 22:39:12,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:12,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374588869] [2020-10-21 22:39:12,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:12,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:12,258 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 22:39:12,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374588869] [2020-10-21 22:39:12,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546621204] [2020-10-21 22:39:12,259 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 22:39:12,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-21 22:39:12,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:12,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-21 22:39:12,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:12,349 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:39:12,359 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 22:39:12,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:12,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-21 22:39:12,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406821804] [2020-10-21 22:39:12,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:39:12,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:12,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:39:12,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:39:12,361 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 15 states. [2020-10-21 22:39:12,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:12,931 INFO L93 Difference]: Finished difference Result 101 states and 239 transitions. [2020-10-21 22:39:12,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-21 22:39:12,931 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-21 22:39:12,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:12,932 INFO L225 Difference]: With dead ends: 101 [2020-10-21 22:39:12,933 INFO L226 Difference]: Without dead ends: 92 [2020-10-21 22:39:12,933 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 22:39:12,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-21 22:39:12,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-21 22:39:12,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-21 22:39:12,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-21 22:39:12,937 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 18 [2020-10-21 22:39:12,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:12,938 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-21 22:39:12,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:39:12,938 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-21 22:39:12,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-21 22:39:12,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:12,939 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:13,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-21 22:39:13,143 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:13,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:13,143 INFO L82 PathProgramCache]: Analyzing trace with hash 183196179, now seen corresponding path program 24 times [2020-10-21 22:39:13,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:13,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885875765] [2020-10-21 22:39:13,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:13,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:13,260 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 22:39:13,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885875765] [2020-10-21 22:39:13,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562033252] [2020-10-21 22:39:13,261 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 22:39:13,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-21 22:39:13,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:13,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-21 22:39:13,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:13,344 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:39:13,361 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 22:39:13,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:13,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-21 22:39:13,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473121116] [2020-10-21 22:39:13,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 22:39:13,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:13,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 22:39:13,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-21 22:39:13,363 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-21 22:39:13,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:13,964 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-10-21 22:39:13,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 22:39:13,965 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-21 22:39:13,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:13,966 INFO L225 Difference]: With dead ends: 102 [2020-10-21 22:39:13,966 INFO L226 Difference]: Without dead ends: 93 [2020-10-21 22:39:13,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-10-21 22:39:13,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-21 22:39:13,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2020-10-21 22:39:13,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-21 22:39:13,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-10-21 22:39:13,969 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 19 [2020-10-21 22:39:13,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:13,970 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-10-21 22:39:13,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 22:39:13,970 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-10-21 22:39:13,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-21 22:39:13,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:13,970 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:14,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-21 22:39:14,171 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:14,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:14,172 INFO L82 PathProgramCache]: Analyzing trace with hash -699703104, now seen corresponding path program 25 times [2020-10-21 22:39:14,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:14,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470975378] [2020-10-21 22:39:14,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:14,320 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 22:39:14,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470975378] [2020-10-21 22:39:14,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012782662] [2020-10-21 22:39:14,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:14,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-21 22:39:14,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:14,403 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:14,414 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 22:39:14,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:14,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-21 22:39:14,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86124974] [2020-10-21 22:39:14,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 22:39:14,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:14,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 22:39:14,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-21 22:39:14,416 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 16 states. [2020-10-21 22:39:14,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:14,972 INFO L93 Difference]: Finished difference Result 88 states and 213 transitions. [2020-10-21 22:39:14,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-21 22:39:14,972 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-21 22:39:14,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:14,973 INFO L225 Difference]: With dead ends: 88 [2020-10-21 22:39:14,973 INFO L226 Difference]: Without dead ends: 83 [2020-10-21 22:39:14,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-10-21 22:39:14,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-21 22:39:14,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-10-21 22:39:14,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-21 22:39:14,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-21 22:39:14,976 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-21 22:39:14,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:14,977 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-21 22:39:14,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 22:39:14,977 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-21 22:39:14,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-21 22:39:14,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:14,978 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:15,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:15,184 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:15,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:15,184 INFO L82 PathProgramCache]: Analyzing trace with hash -923845315, now seen corresponding path program 26 times [2020-10-21 22:39:15,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:15,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990043224] [2020-10-21 22:39:15,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:15,352 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 22:39:15,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990043224] [2020-10-21 22:39:15,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950468227] [2020-10-21 22:39:15,353 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 22:39:15,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:39:15,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:15,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-21 22:39:15,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:15,405 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:15,424 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 22:39:15,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:15,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-21 22:39:15,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83391170] [2020-10-21 22:39:15,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 22:39:15,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:15,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 22:39:15,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-21 22:39:15,426 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-21 22:39:15,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:15,731 INFO L93 Difference]: Finished difference Result 88 states and 211 transitions. [2020-10-21 22:39:15,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-21 22:39:15,732 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-21 22:39:15,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:15,733 INFO L225 Difference]: With dead ends: 88 [2020-10-21 22:39:15,733 INFO L226 Difference]: Without dead ends: 82 [2020-10-21 22:39:15,734 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 22:39:15,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-21 22:39:15,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2020-10-21 22:39:15,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-21 22:39:15,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-21 22:39:15,737 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 20 [2020-10-21 22:39:15,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:15,738 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-21 22:39:15,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 22:39:15,738 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-21 22:39:15,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-21 22:39:15,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:15,739 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:15,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-21 22:39:15,950 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:15,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:15,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1384142351, now seen corresponding path program 27 times [2020-10-21 22:39:15,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:15,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329875039] [2020-10-21 22:39:15,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:16,080 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 22:39:16,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329875039] [2020-10-21 22:39:16,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503567770] [2020-10-21 22:39:16,082 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 22:39:16,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-21 22:39:16,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:16,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-21 22:39:16,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:16,215 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:16,239 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 22:39:16,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:16,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-21 22:39:16,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425426371] [2020-10-21 22:39:16,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-21 22:39:16,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:16,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-21 22:39:16,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-21 22:39:16,241 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 17 states. [2020-10-21 22:39:16,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:16,889 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-21 22:39:16,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-21 22:39:16,890 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-21 22:39:16,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:16,891 INFO L225 Difference]: With dead ends: 103 [2020-10-21 22:39:16,891 INFO L226 Difference]: Without dead ends: 98 [2020-10-21 22:39:16,892 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 22:39:16,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-21 22:39:16,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 57. [2020-10-21 22:39:16,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-21 22:39:16,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-10-21 22:39:16,895 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 20 [2020-10-21 22:39:16,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:16,895 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-10-21 22:39:16,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-21 22:39:16,895 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-10-21 22:39:16,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-21 22:39:16,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:16,896 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:17,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-21 22:39:17,105 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:17,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:17,105 INFO L82 PathProgramCache]: Analyzing trace with hash -215934529, now seen corresponding path program 28 times [2020-10-21 22:39:17,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:17,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118580254] [2020-10-21 22:39:17,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:17,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:17,267 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 22:39:17,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118580254] [2020-10-21 22:39:17,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201112762] [2020-10-21 22:39:17,268 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 22:39:17,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:39:17,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:17,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-21 22:39:17,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:17,369 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:39:17,387 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 22:39:17,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:17,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-21 22:39:17,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961111093] [2020-10-21 22:39:17,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-21 22:39:17,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:17,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-21 22:39:17,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-21 22:39:17,390 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 17 states. [2020-10-21 22:39:18,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:18,145 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-21 22:39:18,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-21 22:39:18,146 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-21 22:39:18,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:18,147 INFO L225 Difference]: With dead ends: 111 [2020-10-21 22:39:18,148 INFO L226 Difference]: Without dead ends: 102 [2020-10-21 22:39:18,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-10-21 22:39:18,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-21 22:39:18,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2020-10-21 22:39:18,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-21 22:39:18,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-21 22:39:18,171 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 20 [2020-10-21 22:39:18,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:18,171 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-21 22:39:18,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-21 22:39:18,171 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-21 22:39:18,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-21 22:39:18,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:18,173 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:18,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:18,381 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:18,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:18,382 INFO L82 PathProgramCache]: Analyzing trace with hash -41234864, now seen corresponding path program 29 times [2020-10-21 22:39:18,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:18,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756338574] [2020-10-21 22:39:18,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:18,603 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 22:39:18,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756338574] [2020-10-21 22:39:18,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108524113] [2020-10-21 22:39:18,604 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 22:39:18,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-21 22:39:18,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:18,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-21 22:39:18,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:18,717 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:39:18,736 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 22:39:18,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:18,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-21 22:39:18,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353750421] [2020-10-21 22:39:18,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-21 22:39:18,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:18,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-21 22:39:18,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-21 22:39:18,739 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-21 22:39:19,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:19,567 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-10-21 22:39:19,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-21 22:39:19,568 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-21 22:39:19,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:19,569 INFO L225 Difference]: With dead ends: 112 [2020-10-21 22:39:19,569 INFO L226 Difference]: Without dead ends: 103 [2020-10-21 22:39:19,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-10-21 22:39:19,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-21 22:39:19,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 57. [2020-10-21 22:39:19,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-21 22:39:19,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-10-21 22:39:19,573 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 21 [2020-10-21 22:39:19,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:19,573 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-10-21 22:39:19,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-21 22:39:19,573 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-10-21 22:39:19,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-21 22:39:19,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:19,574 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:19,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:19,783 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:19,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:19,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1895992291, now seen corresponding path program 30 times [2020-10-21 22:39:19,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:19,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660732613] [2020-10-21 22:39:19,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:19,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:19,930 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 22:39:19,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660732613] [2020-10-21 22:39:19,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040835394] [2020-10-21 22:39:19,931 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 22:39:19,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-21 22:39:19,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:19,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-21 22:39:19,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:20,023 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:20,047 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:20,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:20,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-21 22:39:20,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067737556] [2020-10-21 22:39:20,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-21 22:39:20,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:20,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-21 22:39:20,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-21 22:39:20,049 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 18 states. [2020-10-21 22:39:20,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:20,718 INFO L93 Difference]: Finished difference Result 96 states and 233 transitions. [2020-10-21 22:39:20,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-21 22:39:20,719 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-21 22:39:20,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:20,721 INFO L225 Difference]: With dead ends: 96 [2020-10-21 22:39:20,721 INFO L226 Difference]: Without dead ends: 91 [2020-10-21 22:39:20,722 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 22:39:20,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-21 22:39:20,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2020-10-21 22:39:20,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-21 22:39:20,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-21 22:39:20,725 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-21 22:39:20,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:20,725 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-21 22:39:20,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-21 22:39:20,725 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-21 22:39:20,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-21 22:39:20,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:20,726 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:20,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-21 22:39:20,932 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:20,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:20,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1242888800, now seen corresponding path program 31 times [2020-10-21 22:39:20,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:20,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233454102] [2020-10-21 22:39:20,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:21,133 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 22:39:21,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233454102] [2020-10-21 22:39:21,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875381543] [2020-10-21 22:39:21,134 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 22:39:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:21,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-21 22:39:21,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:21,189 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:21,218 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 22:39:21,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:21,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-21 22:39:21,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257886529] [2020-10-21 22:39:21,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-21 22:39:21,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:21,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-21 22:39:21,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-21 22:39:21,221 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-21 22:39:21,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:21,580 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-21 22:39:21,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 22:39:21,580 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-21 22:39:21,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:21,581 INFO L225 Difference]: With dead ends: 96 [2020-10-21 22:39:21,582 INFO L226 Difference]: Without dead ends: 90 [2020-10-21 22:39:21,583 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 22:39:21,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-21 22:39:21,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2020-10-21 22:39:21,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-21 22:39:21,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-21 22:39:21,586 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 22 [2020-10-21 22:39:21,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:21,586 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-21 22:39:21,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-21 22:39:21,587 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-21 22:39:21,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-21 22:39:21,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:21,587 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:21,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:21,797 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:21,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:21,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1278252686, now seen corresponding path program 32 times [2020-10-21 22:39:21,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:21,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054220722] [2020-10-21 22:39:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:21,949 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 22:39:21,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054220722] [2020-10-21 22:39:21,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008548214] [2020-10-21 22:39:21,950 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 22:39:22,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:39:22,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:22,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-21 22:39:22,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:22,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:22,068 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 22:39:22,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:22,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-21 22:39:22,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656014985] [2020-10-21 22:39:22,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-21 22:39:22,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:22,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-21 22:39:22,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-21 22:39:22,070 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 19 states. [2020-10-21 22:39:22,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:22,853 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-21 22:39:22,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-21 22:39:22,854 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-21 22:39:22,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:22,855 INFO L225 Difference]: With dead ends: 113 [2020-10-21 22:39:22,855 INFO L226 Difference]: Without dead ends: 108 [2020-10-21 22:39:22,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-10-21 22:39:22,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-21 22:39:22,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 61. [2020-10-21 22:39:22,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-21 22:39:22,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-10-21 22:39:22,860 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 22 [2020-10-21 22:39:22,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:22,860 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-10-21 22:39:22,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-21 22:39:22,860 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-10-21 22:39:22,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-21 22:39:22,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:22,861 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:23,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-21 22:39:23,070 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:23,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:23,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1353755908, now seen corresponding path program 33 times [2020-10-21 22:39:23,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:23,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760166821] [2020-10-21 22:39:23,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:23,222 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 22:39:23,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760166821] [2020-10-21 22:39:23,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900131725] [2020-10-21 22:39:23,223 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 22:39:23,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-21 22:39:23,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:23,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-21 22:39:23,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:23,364 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 22:39:23,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:23,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-21 22:39:23,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906868785] [2020-10-21 22:39:23,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-21 22:39:23,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:23,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-21 22:39:23,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-21 22:39:23,367 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 19 states. [2020-10-21 22:39:24,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:24,082 INFO L93 Difference]: Finished difference Result 121 states and 287 transitions. [2020-10-21 22:39:24,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-21 22:39:24,083 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-21 22:39:24,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:24,084 INFO L225 Difference]: With dead ends: 121 [2020-10-21 22:39:24,085 INFO L226 Difference]: Without dead ends: 112 [2020-10-21 22:39:24,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=587, Invalid=1483, Unknown=0, NotChecked=0, Total=2070 [2020-10-21 22:39:24,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-21 22:39:24,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 77. [2020-10-21 22:39:24,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-21 22:39:24,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-21 22:39:24,090 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 22 [2020-10-21 22:39:24,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:24,090 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-21 22:39:24,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-21 22:39:24,090 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-21 22:39:24,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-21 22:39:24,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:24,091 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:24,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:24,299 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:24,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:24,299 INFO L82 PathProgramCache]: Analyzing trace with hash -971102387, now seen corresponding path program 34 times [2020-10-21 22:39:24,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:24,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983765984] [2020-10-21 22:39:24,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:24,464 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 22:39:24,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983765984] [2020-10-21 22:39:24,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754971885] [2020-10-21 22:39:24,464 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 22:39:24,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:39:24,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:24,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-21 22:39:24,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:24,578 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:39:24,593 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 22:39:24,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:24,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-21 22:39:24,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565409823] [2020-10-21 22:39:24,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-21 22:39:24,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:24,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-21 22:39:24,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-21 22:39:24,595 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-21 22:39:25,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:25,475 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-10-21 22:39:25,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-21 22:39:25,476 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-21 22:39:25,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:25,477 INFO L225 Difference]: With dead ends: 122 [2020-10-21 22:39:25,477 INFO L226 Difference]: Without dead ends: 113 [2020-10-21 22:39:25,478 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 22:39:25,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-21 22:39:25,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 61. [2020-10-21 22:39:25,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-21 22:39:25,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-10-21 22:39:25,481 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 23 [2020-10-21 22:39:25,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:25,482 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-10-21 22:39:25,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-21 22:39:25,482 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-10-21 22:39:25,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-21 22:39:25,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:25,482 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:25,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-21 22:39:25,693 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:25,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:25,693 INFO L82 PathProgramCache]: Analyzing trace with hash 983267910, now seen corresponding path program 35 times [2020-10-21 22:39:25,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:25,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412662774] [2020-10-21 22:39:25,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:25,865 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 22:39:25,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412662774] [2020-10-21 22:39:25,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290762038] [2020-10-21 22:39:25,865 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 22:39:25,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-21 22:39:25,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:25,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-21 22:39:25,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:25,983 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:26,004 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 22:39:26,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:26,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-21 22:39:26,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066682347] [2020-10-21 22:39:26,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-21 22:39:26,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:26,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-21 22:39:26,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-21 22:39:26,006 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 20 states. [2020-10-21 22:39:26,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:26,884 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2020-10-21 22:39:26,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-21 22:39:26,885 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-21 22:39:26,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:26,886 INFO L225 Difference]: With dead ends: 104 [2020-10-21 22:39:26,886 INFO L226 Difference]: Without dead ends: 99 [2020-10-21 22:39:26,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-10-21 22:39:26,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-21 22:39:26,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2020-10-21 22:39:26,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-21 22:39:26,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-21 22:39:26,894 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-21 22:39:26,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:26,894 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-21 22:39:26,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-21 22:39:26,894 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-21 22:39:26,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-21 22:39:26,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:26,897 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:27,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-21 22:39:27,107 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:27,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:27,107 INFO L82 PathProgramCache]: Analyzing trace with hash 415234755, now seen corresponding path program 36 times [2020-10-21 22:39:27,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:27,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255442850] [2020-10-21 22:39:27,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:27,375 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 22:39:27,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255442850] [2020-10-21 22:39:27,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045952978] [2020-10-21 22:39:27,376 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 22:39:27,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-21 22:39:27,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:27,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-21 22:39:27,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:27,438 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:27,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:27,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-21 22:39:27,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527433924] [2020-10-21 22:39:27,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-21 22:39:27,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:27,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-21 22:39:27,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-10-21 22:39:27,452 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-21 22:39:27,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:27,876 INFO L93 Difference]: Finished difference Result 104 states and 251 transitions. [2020-10-21 22:39:27,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 22:39:27,877 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-21 22:39:27,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:27,878 INFO L225 Difference]: With dead ends: 104 [2020-10-21 22:39:27,878 INFO L226 Difference]: Without dead ends: 98 [2020-10-21 22:39:27,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2020-10-21 22:39:27,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-21 22:39:27,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-10-21 22:39:27,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-21 22:39:27,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-21 22:39:27,884 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 24 [2020-10-21 22:39:27,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:27,884 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-21 22:39:27,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-21 22:39:27,885 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-21 22:39:27,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-21 22:39:27,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:27,886 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:28,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-21 22:39:28,099 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:28,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:28,099 INFO L82 PathProgramCache]: Analyzing trace with hash -39374827, now seen corresponding path program 37 times [2020-10-21 22:39:28,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:28,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686336774] [2020-10-21 22:39:28,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:28,274 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 22:39:28,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686336774] [2020-10-21 22:39:28,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972355265] [2020-10-21 22:39:28,275 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 22:39:28,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:28,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-21 22:39:28,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:28,387 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:28,428 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 22:39:28,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:28,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-21 22:39:28,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146783225] [2020-10-21 22:39:28,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-21 22:39:28,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:28,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-21 22:39:28,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-21 22:39:28,431 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 21 states. [2020-10-21 22:39:29,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:29,379 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-21 22:39:29,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-21 22:39:29,379 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-21 22:39:29,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:29,380 INFO L225 Difference]: With dead ends: 123 [2020-10-21 22:39:29,381 INFO L226 Difference]: Without dead ends: 118 [2020-10-21 22:39:29,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-21 22:39:29,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-21 22:39:29,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 65. [2020-10-21 22:39:29,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-21 22:39:29,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-10-21 22:39:29,385 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 24 [2020-10-21 22:39:29,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:29,385 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-10-21 22:39:29,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-21 22:39:29,385 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-10-21 22:39:29,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-21 22:39:29,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:29,386 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:29,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-21 22:39:29,587 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:29,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:29,587 INFO L82 PathProgramCache]: Analyzing trace with hash 416559353, now seen corresponding path program 38 times [2020-10-21 22:39:29,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:29,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118204974] [2020-10-21 22:39:29,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:29,760 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 22:39:29,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118204974] [2020-10-21 22:39:29,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36585614] [2020-10-21 22:39:29,761 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 22:39:29,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:39:29,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:29,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-21 22:39:29,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:29,858 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 22:39:29,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:29,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-21 22:39:29,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529081326] [2020-10-21 22:39:29,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-21 22:39:29,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:29,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-21 22:39:29,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-21 22:39:29,860 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 21 states. [2020-10-21 22:39:30,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:30,790 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-21 22:39:30,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-21 22:39:30,790 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-21 22:39:30,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:30,792 INFO L225 Difference]: With dead ends: 131 [2020-10-21 22:39:30,792 INFO L226 Difference]: Without dead ends: 122 [2020-10-21 22:39:30,793 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 22:39:30,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-21 22:39:30,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 83. [2020-10-21 22:39:30,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-21 22:39:30,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-21 22:39:30,796 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 24 [2020-10-21 22:39:30,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:30,797 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-21 22:39:30,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-21 22:39:30,797 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-21 22:39:30,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-21 22:39:30,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:30,798 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:31,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-21 22:39:31,008 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:31,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:31,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1220594422, now seen corresponding path program 39 times [2020-10-21 22:39:31,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:31,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929339037] [2020-10-21 22:39:31,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:31,188 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 22:39:31,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929339037] [2020-10-21 22:39:31,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391494623] [2020-10-21 22:39:31,189 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 22:39:31,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-21 22:39:31,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:31,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-21 22:39:31,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:31,294 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 22:39:31,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:31,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-21 22:39:31,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480132095] [2020-10-21 22:39:31,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-21 22:39:31,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:31,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-21 22:39:31,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-21 22:39:31,296 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-21 22:39:32,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:32,336 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-10-21 22:39:32,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-21 22:39:32,336 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-21 22:39:32,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:32,338 INFO L225 Difference]: With dead ends: 132 [2020-10-21 22:39:32,338 INFO L226 Difference]: Without dead ends: 123 [2020-10-21 22:39:32,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=910, Invalid=2282, Unknown=0, NotChecked=0, Total=3192 [2020-10-21 22:39:32,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-21 22:39:32,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 65. [2020-10-21 22:39:32,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-21 22:39:32,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-10-21 22:39:32,343 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 25 [2020-10-21 22:39:32,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:32,344 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-10-21 22:39:32,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-21 22:39:32,344 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-10-21 22:39:32,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-21 22:39:32,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:32,344 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:32,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-21 22:39:32,555 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:32,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:32,555 INFO L82 PathProgramCache]: Analyzing trace with hash 28466153, now seen corresponding path program 40 times [2020-10-21 22:39:32,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:32,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987311131] [2020-10-21 22:39:32,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:32,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:32,772 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 22:39:32,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987311131] [2020-10-21 22:39:32,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800793331] [2020-10-21 22:39:32,773 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 22:39:32,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:39:32,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:32,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-21 22:39:32,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:32,879 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:32,906 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:32,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:32,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-21 22:39:32,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205147466] [2020-10-21 22:39:32,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-21 22:39:32,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:32,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-21 22:39:32,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-21 22:39:32,908 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 22 states. [2020-10-21 22:39:33,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:33,913 INFO L93 Difference]: Finished difference Result 112 states and 273 transitions. [2020-10-21 22:39:33,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-21 22:39:33,914 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-21 22:39:33,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:33,915 INFO L225 Difference]: With dead ends: 112 [2020-10-21 22:39:33,915 INFO L226 Difference]: Without dead ends: 107 [2020-10-21 22:39:33,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-21 22:39:33,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-21 22:39:33,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-10-21 22:39:33,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-21 22:39:33,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-21 22:39:33,922 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-21 22:39:33,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:33,922 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-21 22:39:33,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-21 22:39:33,922 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-21 22:39:33,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-21 22:39:33,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:33,923 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:34,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-21 22:39:34,134 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:34,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:34,134 INFO L82 PathProgramCache]: Analyzing trace with hash -391352730, now seen corresponding path program 41 times [2020-10-21 22:39:34,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:34,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242790013] [2020-10-21 22:39:34,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:34,456 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 22:39:34,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242790013] [2020-10-21 22:39:34,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737009141] [2020-10-21 22:39:34,457 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 22:39:34,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-21 22:39:34,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:34,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-21 22:39:34,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:34,551 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:34,571 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 22:39:34,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:34,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-21 22:39:34,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677217831] [2020-10-21 22:39:34,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-21 22:39:34,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:34,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-21 22:39:34,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-10-21 22:39:34,574 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-21 22:39:35,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:35,195 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-21 22:39:35,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 22:39:35,196 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-21 22:39:35,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:35,197 INFO L225 Difference]: With dead ends: 112 [2020-10-21 22:39:35,197 INFO L226 Difference]: Without dead ends: 106 [2020-10-21 22:39:35,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=540, Invalid=1100, Unknown=0, NotChecked=0, Total=1640 [2020-10-21 22:39:35,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-21 22:39:35,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2020-10-21 22:39:35,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-21 22:39:35,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-10-21 22:39:35,201 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 26 [2020-10-21 22:39:35,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:35,201 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-10-21 22:39:35,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-21 22:39:35,201 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-10-21 22:39:35,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-21 22:39:35,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:35,202 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:35,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:35,413 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:35,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:35,413 INFO L82 PathProgramCache]: Analyzing trace with hash 816306680, now seen corresponding path program 42 times [2020-10-21 22:39:35,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:35,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945114079] [2020-10-21 22:39:35,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:35,624 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 22:39:35,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945114079] [2020-10-21 22:39:35,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050196237] [2020-10-21 22:39:35,625 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 22:39:35,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-21 22:39:35,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:35,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-21 22:39:35,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:35,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:35,746 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 22:39:35,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:35,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-21 22:39:35,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407267016] [2020-10-21 22:39:35,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-21 22:39:35,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:35,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-21 22:39:35,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-21 22:39:35,748 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 23 states. [2020-10-21 22:39:36,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:36,992 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-10-21 22:39:36,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-21 22:39:36,992 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-21 22:39:36,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:36,994 INFO L225 Difference]: With dead ends: 133 [2020-10-21 22:39:36,994 INFO L226 Difference]: Without dead ends: 128 [2020-10-21 22:39:36,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-21 22:39:37,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-21 22:39:37,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 69. [2020-10-21 22:39:37,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-21 22:39:37,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-10-21 22:39:37,003 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 26 [2020-10-21 22:39:37,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:37,004 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-10-21 22:39:37,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-21 22:39:37,004 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-10-21 22:39:37,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-21 22:39:37,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:37,005 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:37,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-21 22:39:37,218 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:37,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:37,220 INFO L82 PathProgramCache]: Analyzing trace with hash 882475958, now seen corresponding path program 43 times [2020-10-21 22:39:37,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:37,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604836916] [2020-10-21 22:39:37,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:37,507 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 22:39:37,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604836916] [2020-10-21 22:39:37,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338407832] [2020-10-21 22:39:37,508 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 22:39:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:37,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-21 22:39:37,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:37,630 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:39:37,649 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 22:39:37,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:37,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-21 22:39:37,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093523851] [2020-10-21 22:39:37,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-21 22:39:37,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:37,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-21 22:39:37,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-21 22:39:37,652 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 23 states. [2020-10-21 22:39:38,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:38,807 INFO L93 Difference]: Finished difference Result 141 states and 335 transitions. [2020-10-21 22:39:38,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-21 22:39:38,808 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-21 22:39:38,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:38,809 INFO L225 Difference]: With dead ends: 141 [2020-10-21 22:39:38,809 INFO L226 Difference]: Without dead ends: 132 [2020-10-21 22:39:38,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-21 22:39:38,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-21 22:39:38,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 89. [2020-10-21 22:39:38,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-21 22:39:38,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-21 22:39:38,814 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 26 [2020-10-21 22:39:38,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:38,814 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-21 22:39:38,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-21 22:39:38,814 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-21 22:39:38,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-21 22:39:38,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:38,815 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:39,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:39,016 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:39,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:39,016 INFO L82 PathProgramCache]: Analyzing trace with hash -464271481, now seen corresponding path program 44 times [2020-10-21 22:39:39,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:39,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351405529] [2020-10-21 22:39:39,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:39,240 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 22:39:39,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351405529] [2020-10-21 22:39:39,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894783626] [2020-10-21 22:39:39,241 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 22:39:39,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:39:39,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:39,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-21 22:39:39,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:39,354 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 22:39:39,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:39,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-21 22:39:39,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768667875] [2020-10-21 22:39:39,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-21 22:39:39,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:39,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-21 22:39:39,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-21 22:39:39,356 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-21 22:39:40,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:40,572 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-10-21 22:39:40,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-21 22:39:40,573 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-21 22:39:40,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:40,575 INFO L225 Difference]: With dead ends: 142 [2020-10-21 22:39:40,575 INFO L226 Difference]: Without dead ends: 133 [2020-10-21 22:39:40,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1106, Invalid=2800, Unknown=0, NotChecked=0, Total=3906 [2020-10-21 22:39:40,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-21 22:39:40,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 69. [2020-10-21 22:39:40,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-21 22:39:40,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-10-21 22:39:40,579 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 27 [2020-10-21 22:39:40,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:40,579 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-10-21 22:39:40,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-21 22:39:40,580 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-10-21 22:39:40,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-21 22:39:40,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:40,580 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:40,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-21 22:39:40,791 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:40,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:40,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1586979020, now seen corresponding path program 45 times [2020-10-21 22:39:40,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:40,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495858400] [2020-10-21 22:39:40,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:41,037 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 22:39:41,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495858400] [2020-10-21 22:39:41,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019991071] [2020-10-21 22:39:41,038 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 22:39:41,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-21 22:39:41,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:41,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-21 22:39:41,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:41,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:41,163 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 22:39:41,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:41,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-21 22:39:41,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176844446] [2020-10-21 22:39:41,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-21 22:39:41,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:41,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-21 22:39:41,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-21 22:39:41,165 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 24 states. [2020-10-21 22:39:42,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:42,419 INFO L93 Difference]: Finished difference Result 120 states and 293 transitions. [2020-10-21 22:39:42,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-21 22:39:42,420 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-21 22:39:42,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:42,421 INFO L225 Difference]: With dead ends: 120 [2020-10-21 22:39:42,421 INFO L226 Difference]: Without dead ends: 115 [2020-10-21 22:39:42,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-21 22:39:42,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-21 22:39:42,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2020-10-21 22:39:42,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-21 22:39:42,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-21 22:39:42,426 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-21 22:39:42,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:42,426 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-21 22:39:42,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-21 22:39:42,426 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-21 22:39:42,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-21 22:39:42,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:42,427 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:42,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:42,638 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:42,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:42,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1867154761, now seen corresponding path program 46 times [2020-10-21 22:39:42,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:42,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480163324] [2020-10-21 22:39:42,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:42,997 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 22:39:42,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480163324] [2020-10-21 22:39:42,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128712610] [2020-10-21 22:39:42,998 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 22:39:43,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:39:43,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:43,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-21 22:39:43,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:43,060 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:43,076 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 22:39:43,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:43,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-21 22:39:43,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797449446] [2020-10-21 22:39:43,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-21 22:39:43,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:43,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-21 22:39:43,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-10-21 22:39:43,077 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-10-21 22:39:43,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:43,653 INFO L93 Difference]: Finished difference Result 120 states and 291 transitions. [2020-10-21 22:39:43,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-21 22:39:43,653 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-21 22:39:43,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:43,655 INFO L225 Difference]: With dead ends: 120 [2020-10-21 22:39:43,655 INFO L226 Difference]: Without dead ends: 114 [2020-10-21 22:39:43,655 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 22:39:43,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-21 22:39:43,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2020-10-21 22:39:43,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-21 22:39:43,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 239 transitions. [2020-10-21 22:39:43,660 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 239 transitions. Word has length 28 [2020-10-21 22:39:43,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:43,660 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 239 transitions. [2020-10-21 22:39:43,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-21 22:39:43,661 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 239 transitions. [2020-10-21 22:39:43,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-21 22:39:43,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:43,662 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:43,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-21 22:39:43,863 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:43,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:43,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1507485925, now seen corresponding path program 47 times [2020-10-21 22:39:43,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:43,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538504326] [2020-10-21 22:39:43,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:44,130 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 22:39:44,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538504326] [2020-10-21 22:39:44,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901425726] [2020-10-21 22:39:44,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:39:44,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-21 22:39:44,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:44,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-21 22:39:44,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:44,224 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:44,248 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 22:39:44,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:44,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-21 22:39:44,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774767843] [2020-10-21 22:39:44,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-21 22:39:44,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:44,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-21 22:39:44,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-10-21 22:39:44,250 INFO L87 Difference]: Start difference. First operand 94 states and 239 transitions. Second operand 25 states. [2020-10-21 22:39:45,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:45,553 INFO L93 Difference]: Finished difference Result 143 states and 341 transitions. [2020-10-21 22:39:45,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-21 22:39:45,554 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-21 22:39:45,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:45,555 INFO L225 Difference]: With dead ends: 143 [2020-10-21 22:39:45,555 INFO L226 Difference]: Without dead ends: 138 [2020-10-21 22:39:45,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-10-21 22:39:45,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-21 22:39:45,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 73. [2020-10-21 22:39:45,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-21 22:39:45,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 177 transitions. [2020-10-21 22:39:45,560 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 177 transitions. Word has length 28 [2020-10-21 22:39:45,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:45,560 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 177 transitions. [2020-10-21 22:39:45,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-21 22:39:45,560 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 177 transitions. [2020-10-21 22:39:45,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-21 22:39:45,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:45,561 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:45,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-21 22:39:45,767 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:45,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:45,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1951734579, now seen corresponding path program 48 times [2020-10-21 22:39:45,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:45,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245834431] [2020-10-21 22:39:45,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:46,008 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 22:39:46,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245834431] [2020-10-21 22:39:46,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041401965] [2020-10-21 22:39:46,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:39:46,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-21 22:39:46,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:46,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-21 22:39:46,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:46,124 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 22:39:46,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:46,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-21 22:39:46,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811242360] [2020-10-21 22:39:46,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-21 22:39:46,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:46,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-21 22:39:46,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-10-21 22:39:46,126 INFO L87 Difference]: Start difference. First operand 73 states and 177 transitions. Second operand 25 states. [2020-10-21 22:39:47,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:47,373 INFO L93 Difference]: Finished difference Result 151 states and 359 transitions. [2020-10-21 22:39:47,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-21 22:39:47,374 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-21 22:39:47,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:47,375 INFO L225 Difference]: With dead ends: 151 [2020-10-21 22:39:47,375 INFO L226 Difference]: Without dead ends: 142 [2020-10-21 22:39:47,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1121, Invalid=2911, Unknown=0, NotChecked=0, Total=4032 [2020-10-21 22:39:47,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-21 22:39:47,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 95. [2020-10-21 22:39:47,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-21 22:39:47,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 243 transitions. [2020-10-21 22:39:47,379 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 243 transitions. Word has length 28 [2020-10-21 22:39:47,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:47,379 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 243 transitions. [2020-10-21 22:39:47,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-21 22:39:47,379 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 243 transitions. [2020-10-21 22:39:47,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-21 22:39:47,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:47,380 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:47,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-21 22:39:47,589 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:47,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:47,590 INFO L82 PathProgramCache]: Analyzing trace with hash 512601796, now seen corresponding path program 49 times [2020-10-21 22:39:47,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:47,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880845509] [2020-10-21 22:39:47,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:47,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880845509] [2020-10-21 22:39:47,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850729752] [2020-10-21 22:39:47,848 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 22:39:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:47,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-21 22:39:47,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:47,947 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:39:47,964 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:47,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:47,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-21 22:39:47,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044763320] [2020-10-21 22:39:47,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-21 22:39:47,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:47,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-21 22:39:47,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-10-21 22:39:47,966 INFO L87 Difference]: Start difference. First operand 95 states and 243 transitions. Second operand 26 states. [2020-10-21 22:39:49,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:49,610 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-10-21 22:39:49,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-21 22:39:49,610 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-21 22:39:49,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:49,612 INFO L225 Difference]: With dead ends: 152 [2020-10-21 22:39:49,612 INFO L226 Difference]: Without dead ends: 143 [2020-10-21 22:39:49,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1459, Invalid=3233, Unknown=0, NotChecked=0, Total=4692 [2020-10-21 22:39:49,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-21 22:39:49,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 73. [2020-10-21 22:39:49,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-21 22:39:49,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 177 transitions. [2020-10-21 22:39:49,615 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 177 transitions. Word has length 29 [2020-10-21 22:39:49,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:49,616 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 177 transitions. [2020-10-21 22:39:49,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-21 22:39:49,616 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 177 transitions. [2020-10-21 22:39:49,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-21 22:39:49,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:49,617 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:49,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-21 22:39:49,818 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:49,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:49,819 INFO L82 PathProgramCache]: Analyzing trace with hash 374257903, now seen corresponding path program 50 times [2020-10-21 22:39:49,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:49,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357298317] [2020-10-21 22:39:49,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:50,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357298317] [2020-10-21 22:39:50,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789341501] [2020-10-21 22:39:50,105 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 22:39:50,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:39:50,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:50,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-21 22:39:50,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:50,202 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:50,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:50,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-21 22:39:50,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374115020] [2020-10-21 22:39:50,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-21 22:39:50,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:50,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-21 22:39:50,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2020-10-21 22:39:50,227 INFO L87 Difference]: Start difference. First operand 73 states and 177 transitions. Second operand 26 states. [2020-10-21 22:39:51,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:51,689 INFO L93 Difference]: Finished difference Result 128 states and 313 transitions. [2020-10-21 22:39:51,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-21 22:39:51,690 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-21 22:39:51,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:51,691 INFO L225 Difference]: With dead ends: 128 [2020-10-21 22:39:51,691 INFO L226 Difference]: Without dead ends: 123 [2020-10-21 22:39:51,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1409, Invalid=3013, Unknown=0, NotChecked=0, Total=4422 [2020-10-21 22:39:51,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-21 22:39:51,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 97. [2020-10-21 22:39:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-21 22:39:51,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 249 transitions. [2020-10-21 22:39:51,694 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 249 transitions. Word has length 29 [2020-10-21 22:39:51,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:51,694 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 249 transitions. [2020-10-21 22:39:51,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-21 22:39:51,695 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 249 transitions. [2020-10-21 22:39:51,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-21 22:39:51,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:51,695 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:51,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:51,899 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:51,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:51,899 INFO L82 PathProgramCache]: Analyzing trace with hash -960598164, now seen corresponding path program 51 times [2020-10-21 22:39:51,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:51,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820925336] [2020-10-21 22:39:51,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:52,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820925336] [2020-10-21 22:39:52,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369606074] [2020-10-21 22:39:52,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:52,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-21 22:39:52,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:52,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-21 22:39:52,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:52,381 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:52,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:52,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-21 22:39:52,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310093498] [2020-10-21 22:39:52,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-21 22:39:52,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:52,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-21 22:39:52,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-10-21 22:39:52,395 INFO L87 Difference]: Start difference. First operand 97 states and 249 transitions. Second operand 26 states. [2020-10-21 22:39:53,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:53,061 INFO L93 Difference]: Finished difference Result 128 states and 311 transitions. [2020-10-21 22:39:53,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 22:39:53,061 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-21 22:39:53,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:53,063 INFO L225 Difference]: With dead ends: 128 [2020-10-21 22:39:53,063 INFO L226 Difference]: Without dead ends: 122 [2020-10-21 22:39:53,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=768, Invalid=1584, Unknown=0, NotChecked=0, Total=2352 [2020-10-21 22:39:53,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-21 22:39:53,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 100. [2020-10-21 22:39:53,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-21 22:39:53,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 255 transitions. [2020-10-21 22:39:53,066 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 255 transitions. Word has length 30 [2020-10-21 22:39:53,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:53,066 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 255 transitions. [2020-10-21 22:39:53,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-21 22:39:53,066 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 255 transitions. [2020-10-21 22:39:53,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-21 22:39:53,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:53,067 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:53,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:53,273 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:53,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:53,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1289185410, now seen corresponding path program 52 times [2020-10-21 22:39:53,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:53,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428532150] [2020-10-21 22:39:53,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:53,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428532150] [2020-10-21 22:39:53,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593056412] [2020-10-21 22:39:53,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:53,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:39:53,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:53,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-21 22:39:53,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:53,678 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:53,701 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:53,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:53,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-21 22:39:53,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910343628] [2020-10-21 22:39:53,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-21 22:39:53,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:53,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-21 22:39:53,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-10-21 22:39:53,703 INFO L87 Difference]: Start difference. First operand 100 states and 255 transitions. Second operand 27 states. [2020-10-21 22:39:55,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:55,273 INFO L93 Difference]: Finished difference Result 153 states and 365 transitions. [2020-10-21 22:39:55,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-21 22:39:55,274 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-21 22:39:55,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:55,276 INFO L225 Difference]: With dead ends: 153 [2020-10-21 22:39:55,276 INFO L226 Difference]: Without dead ends: 148 [2020-10-21 22:39:55,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1649, Invalid=3463, Unknown=0, NotChecked=0, Total=5112 [2020-10-21 22:39:55,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-21 22:39:55,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 77. [2020-10-21 22:39:55,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-21 22:39:55,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 187 transitions. [2020-10-21 22:39:55,280 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 187 transitions. Word has length 30 [2020-10-21 22:39:55,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:55,280 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 187 transitions. [2020-10-21 22:39:55,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-21 22:39:55,281 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 187 transitions. [2020-10-21 22:39:55,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-21 22:39:55,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:55,281 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:55,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-21 22:39:55,491 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:55,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:55,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1282881680, now seen corresponding path program 53 times [2020-10-21 22:39:55,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:55,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679593061] [2020-10-21 22:39:55,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:55,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:55,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679593061] [2020-10-21 22:39:55,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850272311] [2020-10-21 22:39:55,946 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:56,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-21 22:39:56,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:56,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-21 22:39:56,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:56,080 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:39:56,107 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:56,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:56,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-21 22:39:56,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319449132] [2020-10-21 22:39:56,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-21 22:39:56,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:56,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-21 22:39:56,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2020-10-21 22:39:56,110 INFO L87 Difference]: Start difference. First operand 77 states and 187 transitions. Second operand 27 states. [2020-10-21 22:39:57,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:57,755 INFO L93 Difference]: Finished difference Result 161 states and 383 transitions. [2020-10-21 22:39:57,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-21 22:39:57,756 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-21 22:39:57,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:57,757 INFO L225 Difference]: With dead ends: 161 [2020-10-21 22:39:57,757 INFO L226 Difference]: Without dead ends: 152 [2020-10-21 22:39:57,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1590, Invalid=3522, Unknown=0, NotChecked=0, Total=5112 [2020-10-21 22:39:57,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-21 22:39:57,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 101. [2020-10-21 22:39:57,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-21 22:39:57,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 259 transitions. [2020-10-21 22:39:57,762 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 259 transitions. Word has length 30 [2020-10-21 22:39:57,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:57,762 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 259 transitions. [2020-10-21 22:39:57,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-21 22:39:57,762 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 259 transitions. [2020-10-21 22:39:57,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-21 22:39:57,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:57,763 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:57,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:57,974 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:57,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:57,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1310016831, now seen corresponding path program 54 times [2020-10-21 22:39:57,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:57,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977315673] [2020-10-21 22:39:57,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:57,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:58,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977315673] [2020-10-21 22:39:58,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305337803] [2020-10-21 22:39:58,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:58,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-21 22:39:58,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:58,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-21 22:39:58,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:58,419 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:39:58,439 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:58,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:58,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-21 22:39:58,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539802090] [2020-10-21 22:39:58,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-21 22:39:58,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:58,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-21 22:39:58,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-10-21 22:39:58,441 INFO L87 Difference]: Start difference. First operand 101 states and 259 transitions. Second operand 28 states. [2020-10-21 22:40:00,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:40:00,180 INFO L93 Difference]: Finished difference Result 162 states and 385 transitions. [2020-10-21 22:40:00,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-21 22:40:00,180 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-21 22:40:00,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:40:00,182 INFO L225 Difference]: With dead ends: 162 [2020-10-21 22:40:00,182 INFO L226 Difference]: Without dead ends: 153 [2020-10-21 22:40:00,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1723, Invalid=3827, Unknown=0, NotChecked=0, Total=5550 [2020-10-21 22:40:00,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-21 22:40:00,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 77. [2020-10-21 22:40:00,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-21 22:40:00,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 187 transitions. [2020-10-21 22:40:00,185 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 187 transitions. Word has length 31 [2020-10-21 22:40:00,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:40:00,185 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 187 transitions. [2020-10-21 22:40:00,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-21 22:40:00,185 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 187 transitions. [2020-10-21 22:40:00,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-21 22:40:00,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:40:00,186 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:40:00,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-21 22:40:00,388 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:40:00,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:40:00,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1114598318, now seen corresponding path program 55 times [2020-10-21 22:40:00,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:40:00,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486565998] [2020-10-21 22:40:00,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:40:00,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:40:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:00,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486565998] [2020-10-21 22:40:00,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077264564] [2020-10-21 22:40:00,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:40:00,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-21 22:40:00,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:40:00,871 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:40:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:00,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:40:00,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-21 22:40:00,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355010534] [2020-10-21 22:40:00,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-21 22:40:00,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:40:00,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-21 22:40:00,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2020-10-21 22:40:00,902 INFO L87 Difference]: Start difference. First operand 77 states and 187 transitions. Second operand 28 states. [2020-10-21 22:40:02,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:40:02,589 INFO L93 Difference]: Finished difference Result 136 states and 333 transitions. [2020-10-21 22:40:02,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-21 22:40:02,590 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-21 22:40:02,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:40:02,592 INFO L225 Difference]: With dead ends: 136 [2020-10-21 22:40:02,592 INFO L226 Difference]: Without dead ends: 131 [2020-10-21 22:40:02,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1669, Invalid=3587, Unknown=0, NotChecked=0, Total=5256 [2020-10-21 22:40:02,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-21 22:40:02,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 103. [2020-10-21 22:40:02,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-21 22:40:02,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 265 transitions. [2020-10-21 22:40:02,596 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 265 transitions. Word has length 31 [2020-10-21 22:40:02,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:40:02,596 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 265 transitions. [2020-10-21 22:40:02,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-21 22:40:02,596 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 265 transitions. [2020-10-21 22:40:02,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-21 22:40:02,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:40:02,597 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:40:02,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-21 22:40:02,806 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:40:02,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:40:02,806 INFO L82 PathProgramCache]: Analyzing trace with hash 283139279, now seen corresponding path program 56 times [2020-10-21 22:40:02,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:40:02,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126935268] [2020-10-21 22:40:02,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:40:02,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:40:03,303 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:03,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126935268] [2020-10-21 22:40:03,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236400220] [2020-10-21 22:40:03,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:03,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:40:03,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:40:03,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-21 22:40:03,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:40:03,363 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:40:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:03,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:40:03,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-21 22:40:03,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651776340] [2020-10-21 22:40:03,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-21 22:40:03,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:40:03,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-21 22:40:03,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-10-21 22:40:03,379 INFO L87 Difference]: Start difference. First operand 103 states and 265 transitions. Second operand 28 states. [2020-10-21 22:40:04,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:40:04,338 INFO L93 Difference]: Finished difference Result 136 states and 331 transitions. [2020-10-21 22:40:04,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-21 22:40:04,339 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-21 22:40:04,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:40:04,341 INFO L225 Difference]: With dead ends: 136 [2020-10-21 22:40:04,341 INFO L226 Difference]: Without dead ends: 130 [2020-10-21 22:40:04,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=897, Invalid=1859, Unknown=0, NotChecked=0, Total=2756 [2020-10-21 22:40:04,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-21 22:40:04,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 106. [2020-10-21 22:40:04,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-21 22:40:04,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 271 transitions. [2020-10-21 22:40:04,346 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 271 transitions. Word has length 32 [2020-10-21 22:40:04,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:40:04,347 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 271 transitions. [2020-10-21 22:40:04,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-21 22:40:04,347 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 271 transitions. [2020-10-21 22:40:04,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-21 22:40:04,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:40:04,348 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:40:04,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-21 22:40:04,562 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:40:04,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:40:04,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1955787999, now seen corresponding path program 57 times [2020-10-21 22:40:04,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:40:04,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430479622] [2020-10-21 22:40:04,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:40:04,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:40:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:05,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430479622] [2020-10-21 22:40:05,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733638945] [2020-10-21 22:40:05,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:05,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-21 22:40:05,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:40:05,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-21 22:40:05,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:40:05,125 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:40:05,150 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:05,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:40:05,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-21 22:40:05,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068108335] [2020-10-21 22:40:05,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-21 22:40:05,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:40:05,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-21 22:40:05,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2020-10-21 22:40:05,152 INFO L87 Difference]: Start difference. First operand 106 states and 271 transitions. Second operand 29 states. [2020-10-21 22:40:06,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:40:06,958 INFO L93 Difference]: Finished difference Result 163 states and 389 transitions. [2020-10-21 22:40:06,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-21 22:40:06,958 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-21 22:40:06,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:40:06,960 INFO L225 Difference]: With dead ends: 163 [2020-10-21 22:40:06,960 INFO L226 Difference]: Without dead ends: 158 [2020-10-21 22:40:06,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1738 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1930, Invalid=4076, Unknown=0, NotChecked=0, Total=6006 [2020-10-21 22:40:06,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-21 22:40:06,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 81. [2020-10-21 22:40:06,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-21 22:40:06,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 197 transitions. [2020-10-21 22:40:06,964 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 197 transitions. Word has length 32 [2020-10-21 22:40:06,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:40:06,964 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 197 transitions. [2020-10-21 22:40:06,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-21 22:40:06,964 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 197 transitions. [2020-10-21 22:40:06,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-21 22:40:06,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:40:06,965 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:40:07,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-21 22:40:07,165 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:40:07,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:40:07,166 INFO L82 PathProgramCache]: Analyzing trace with hash -192784275, now seen corresponding path program 58 times [2020-10-21 22:40:07,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:40:07,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487602130] [2020-10-21 22:40:07,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:40:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:40:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:07,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487602130] [2020-10-21 22:40:07,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967213500] [2020-10-21 22:40:07,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:07,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:40:07,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:40:07,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-21 22:40:07,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:40:07,732 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:40:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:07,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:40:07,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-21 22:40:07,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88489713] [2020-10-21 22:40:07,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-21 22:40:07,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:40:07,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-21 22:40:07,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2020-10-21 22:40:07,766 INFO L87 Difference]: Start difference. First operand 81 states and 197 transitions. Second operand 29 states. [2020-10-21 22:40:10,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:40:10,021 INFO L93 Difference]: Finished difference Result 171 states and 407 transitions. [2020-10-21 22:40:10,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-21 22:40:10,022 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-21 22:40:10,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:40:10,024 INFO L225 Difference]: With dead ends: 171 [2020-10-21 22:40:10,024 INFO L226 Difference]: Without dead ends: 162 [2020-10-21 22:40:10,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1865, Invalid=4141, Unknown=0, NotChecked=0, Total=6006 [2020-10-21 22:40:10,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-21 22:40:10,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 107. [2020-10-21 22:40:10,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-21 22:40:10,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 275 transitions. [2020-10-21 22:40:10,028 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 275 transitions. Word has length 32 [2020-10-21 22:40:10,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:40:10,029 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 275 transitions. [2020-10-21 22:40:10,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-21 22:40:10,029 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 275 transitions. [2020-10-21 22:40:10,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-21 22:40:10,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:40:10,030 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:40:10,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-21 22:40:10,242 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:40:10,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:40:10,243 INFO L82 PathProgramCache]: Analyzing trace with hash -499860610, now seen corresponding path program 59 times [2020-10-21 22:40:10,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:40:10,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497826791] [2020-10-21 22:40:10,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:40:10,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:40:10,602 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:10,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497826791] [2020-10-21 22:40:10,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356227859] [2020-10-21 22:40:10,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:10,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-21 22:40:10,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:40:10,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-21 22:40:10,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:40:10,702 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:40:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:10,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:40:10,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-21 22:40:10,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767142725] [2020-10-21 22:40:10,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-21 22:40:10,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:40:10,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-21 22:40:10,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-10-21 22:40:10,729 INFO L87 Difference]: Start difference. First operand 107 states and 275 transitions. Second operand 30 states. [2020-10-21 22:40:12,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:40:12,732 INFO L93 Difference]: Finished difference Result 172 states and 409 transitions. [2020-10-21 22:40:12,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-21 22:40:12,732 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-21 22:40:12,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:40:12,734 INFO L225 Difference]: With dead ends: 172 [2020-10-21 22:40:12,734 INFO L226 Difference]: Without dead ends: 163 [2020-10-21 22:40:12,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1836 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2009, Invalid=4471, Unknown=0, NotChecked=0, Total=6480 [2020-10-21 22:40:12,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-21 22:40:12,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 81. [2020-10-21 22:40:12,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-21 22:40:12,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 197 transitions. [2020-10-21 22:40:12,738 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 197 transitions. Word has length 33 [2020-10-21 22:40:12,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:40:12,738 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 197 transitions. [2020-10-21 22:40:12,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-21 22:40:12,738 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 197 transitions. [2020-10-21 22:40:12,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-21 22:40:12,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:40:12,738 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:40:12,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:12,939 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:40:12,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:40:12,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1681317131, now seen corresponding path program 60 times [2020-10-21 22:40:12,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:40:12,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462845801] [2020-10-21 22:40:12,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:40:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:40:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:13,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462845801] [2020-10-21 22:40:13,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220141108] [2020-10-21 22:40:13,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:13,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-21 22:40:13,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:40:13,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-21 22:40:13,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:40:13,460 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:13,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:40:13,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-21 22:40:13,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822498555] [2020-10-21 22:40:13,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-21 22:40:13,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:40:13,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-21 22:40:13,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2020-10-21 22:40:13,463 INFO L87 Difference]: Start difference. First operand 81 states and 197 transitions. Second operand 30 states. [2020-10-21 22:40:15,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:40:15,395 INFO L93 Difference]: Finished difference Result 144 states and 353 transitions. [2020-10-21 22:40:15,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-21 22:40:15,396 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-21 22:40:15,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:40:15,397 INFO L225 Difference]: With dead ends: 144 [2020-10-21 22:40:15,397 INFO L226 Difference]: Without dead ends: 139 [2020-10-21 22:40:15,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1716 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1814, Invalid=4666, Unknown=0, NotChecked=0, Total=6480 [2020-10-21 22:40:15,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-21 22:40:15,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 109. [2020-10-21 22:40:15,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-21 22:40:15,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 281 transitions. [2020-10-21 22:40:15,401 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 281 transitions. Word has length 33 [2020-10-21 22:40:15,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:40:15,401 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 281 transitions. [2020-10-21 22:40:15,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-21 22:40:15,401 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 281 transitions. [2020-10-21 22:40:15,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-21 22:40:15,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:40:15,402 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:40:15,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:15,613 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:40:15,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:40:15,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1513913714, now seen corresponding path program 61 times [2020-10-21 22:40:15,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:40:15,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606370915] [2020-10-21 22:40:15,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:40:15,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:40:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:16,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606370915] [2020-10-21 22:40:16,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212092766] [2020-10-21 22:40:16,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:40:16,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-21 22:40:16,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:40:16,236 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:40:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:16,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:40:16,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-21 22:40:16,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228556465] [2020-10-21 22:40:16,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-21 22:40:16,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:40:16,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-21 22:40:16,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-10-21 22:40:16,257 INFO L87 Difference]: Start difference. First operand 109 states and 281 transitions. Second operand 30 states. [2020-10-21 22:40:17,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:40:17,202 INFO L93 Difference]: Finished difference Result 144 states and 351 transitions. [2020-10-21 22:40:17,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-21 22:40:17,203 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-21 22:40:17,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:40:17,204 INFO L225 Difference]: With dead ends: 144 [2020-10-21 22:40:17,205 INFO L226 Difference]: Without dead ends: 138 [2020-10-21 22:40:17,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1036, Invalid=2156, Unknown=0, NotChecked=0, Total=3192 [2020-10-21 22:40:17,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-21 22:40:17,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2020-10-21 22:40:17,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-21 22:40:17,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 287 transitions. [2020-10-21 22:40:17,208 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 287 transitions. Word has length 34 [2020-10-21 22:40:17,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:40:17,208 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 287 transitions. [2020-10-21 22:40:17,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-21 22:40:17,208 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 287 transitions. [2020-10-21 22:40:17,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-21 22:40:17,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:40:17,209 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:40:17,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-21 22:40:17,418 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:40:17,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:40:17,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1684218372, now seen corresponding path program 62 times [2020-10-21 22:40:17,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:40:17,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152429902] [2020-10-21 22:40:17,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:40:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:40:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:17,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152429902] [2020-10-21 22:40:17,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26224102] [2020-10-21 22:40:17,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:17,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:40:17,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:40:17,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-21 22:40:17,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:40:17,940 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:40:17,965 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:17,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:40:17,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-21 22:40:17,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974415577] [2020-10-21 22:40:17,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-21 22:40:17,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:40:17,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-21 22:40:17,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2020-10-21 22:40:17,967 INFO L87 Difference]: Start difference. First operand 112 states and 287 transitions. Second operand 31 states. [2020-10-21 22:40:20,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:40:20,019 INFO L93 Difference]: Finished difference Result 173 states and 413 transitions. [2020-10-21 22:40:20,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-21 22:40:20,019 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-21 22:40:20,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:40:20,020 INFO L225 Difference]: With dead ends: 173 [2020-10-21 22:40:20,020 INFO L226 Difference]: Without dead ends: 168 [2020-10-21 22:40:20,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2233, Invalid=4739, Unknown=0, NotChecked=0, Total=6972 [2020-10-21 22:40:20,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-21 22:40:20,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 85. [2020-10-21 22:40:20,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-21 22:40:20,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 207 transitions. [2020-10-21 22:40:20,024 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 207 transitions. Word has length 34 [2020-10-21 22:40:20,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:40:20,025 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 207 transitions. [2020-10-21 22:40:20,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-21 22:40:20,025 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 207 transitions. [2020-10-21 22:40:20,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-21 22:40:20,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:40:20,025 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:40:20,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:20,229 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:40:20,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:40:20,229 INFO L82 PathProgramCache]: Analyzing trace with hash -581198294, now seen corresponding path program 63 times [2020-10-21 22:40:20,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:40:20,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065203910] [2020-10-21 22:40:20,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:40:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:40:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:20,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065203910] [2020-10-21 22:40:20,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656989537] [2020-10-21 22:40:20,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:20,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-21 22:40:20,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:40:20,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-21 22:40:20,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:40:20,754 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:40:20,778 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:20,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:40:20,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-21 22:40:20,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786223614] [2020-10-21 22:40:20,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-21 22:40:20,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:40:20,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-21 22:40:20,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2020-10-21 22:40:20,780 INFO L87 Difference]: Start difference. First operand 85 states and 207 transitions. Second operand 31 states. [2020-10-21 22:40:23,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:40:23,002 INFO L93 Difference]: Finished difference Result 181 states and 431 transitions. [2020-10-21 22:40:23,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-21 22:40:23,003 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-21 22:40:23,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:40:23,004 INFO L225 Difference]: With dead ends: 181 [2020-10-21 22:40:23,004 INFO L226 Difference]: Without dead ends: 172 [2020-10-21 22:40:23,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1914 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2162, Invalid=4810, Unknown=0, NotChecked=0, Total=6972 [2020-10-21 22:40:23,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-21 22:40:23,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 113. [2020-10-21 22:40:23,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-21 22:40:23,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 291 transitions. [2020-10-21 22:40:23,009 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 291 transitions. Word has length 34 [2020-10-21 22:40:23,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:40:23,010 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 291 transitions. [2020-10-21 22:40:23,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-21 22:40:23,010 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 291 transitions. [2020-10-21 22:40:23,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-21 22:40:23,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:40:23,011 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:40:23,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-21 22:40:23,216 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:40:23,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:40:23,216 INFO L82 PathProgramCache]: Analyzing trace with hash 671187195, now seen corresponding path program 64 times [2020-10-21 22:40:23,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:40:23,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941662186] [2020-10-21 22:40:23,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:40:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:40:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:23,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941662186] [2020-10-21 22:40:23,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310039030] [2020-10-21 22:40:23,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:23,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:40:23,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:40:23,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-21 22:40:23,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:40:23,761 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:40:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:23,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:40:23,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-21 22:40:23,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351239890] [2020-10-21 22:40:23,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-21 22:40:23,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:40:23,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-21 22:40:23,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2020-10-21 22:40:23,791 INFO L87 Difference]: Start difference. First operand 113 states and 291 transitions. Second operand 32 states. [2020-10-21 22:40:26,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:40:26,085 INFO L93 Difference]: Finished difference Result 182 states and 433 transitions. [2020-10-21 22:40:26,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-21 22:40:26,086 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-21 22:40:26,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:40:26,087 INFO L225 Difference]: With dead ends: 182 [2020-10-21 22:40:26,087 INFO L226 Difference]: Without dead ends: 173 [2020-10-21 22:40:26,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2135 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2317, Invalid=5165, Unknown=0, NotChecked=0, Total=7482 [2020-10-21 22:40:26,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-21 22:40:26,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 85. [2020-10-21 22:40:26,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-21 22:40:26,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 207 transitions. [2020-10-21 22:40:26,091 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 207 transitions. Word has length 35 [2020-10-21 22:40:26,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:40:26,091 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 207 transitions. [2020-10-21 22:40:26,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-21 22:40:26,091 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 207 transitions. [2020-10-21 22:40:26,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-21 22:40:26,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:40:26,092 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:40:26,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:26,293 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:40:26,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:40:26,293 INFO L82 PathProgramCache]: Analyzing trace with hash -837249832, now seen corresponding path program 65 times [2020-10-21 22:40:26,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:40:26,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090166646] [2020-10-21 22:40:26,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:40:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:40:26,754 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:26,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090166646] [2020-10-21 22:40:26,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468032822] [2020-10-21 22:40:26,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:26,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-10-21 22:40:26,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:40:26,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-21 22:40:26,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:40:26,857 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:40:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:26,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:40:26,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-21 22:40:26,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644039929] [2020-10-21 22:40:26,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-21 22:40:26,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:40:26,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-21 22:40:26,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-10-21 22:40:26,889 INFO L87 Difference]: Start difference. First operand 85 states and 207 transitions. Second operand 32 states. [2020-10-21 22:40:29,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:40:29,152 INFO L93 Difference]: Finished difference Result 152 states and 373 transitions. [2020-10-21 22:40:29,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-21 22:40:29,153 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-21 22:40:29,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:40:29,154 INFO L225 Difference]: With dead ends: 152 [2020-10-21 22:40:29,154 INFO L226 Difference]: Without dead ends: 147 [2020-10-21 22:40:29,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2255, Invalid=4885, Unknown=0, NotChecked=0, Total=7140 [2020-10-21 22:40:29,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-21 22:40:29,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 115. [2020-10-21 22:40:29,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-21 22:40:29,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 297 transitions. [2020-10-21 22:40:29,158 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 297 transitions. Word has length 35 [2020-10-21 22:40:29,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:40:29,159 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 297 transitions. [2020-10-21 22:40:29,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-21 22:40:29,159 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 297 transitions. [2020-10-21 22:40:29,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-21 22:40:29,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:40:29,160 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:40:29,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-21 22:40:29,371 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:40:29,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:40:29,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1122827947, now seen corresponding path program 66 times [2020-10-21 22:40:29,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:40:29,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269790545] [2020-10-21 22:40:29,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:40:29,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:40:30,004 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:30,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269790545] [2020-10-21 22:40:30,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745839433] [2020-10-21 22:40:30,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:30,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-10-21 22:40:30,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:40:30,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 33 conjunts are in the unsatisfiable core [2020-10-21 22:40:30,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:40:30,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:40:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:30,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:40:30,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-10-21 22:40:30,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367652740] [2020-10-21 22:40:30,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-21 22:40:30,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:40:30,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-21 22:40:30,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-10-21 22:40:30,100 INFO L87 Difference]: Start difference. First operand 115 states and 297 transitions. Second operand 32 states. [2020-10-21 22:40:31,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:40:31,162 INFO L93 Difference]: Finished difference Result 152 states and 371 transitions. [2020-10-21 22:40:31,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-21 22:40:31,163 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2020-10-21 22:40:31,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:40:31,164 INFO L225 Difference]: With dead ends: 152 [2020-10-21 22:40:31,164 INFO L226 Difference]: Without dead ends: 146 [2020-10-21 22:40:31,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1185, Invalid=2475, Unknown=0, NotChecked=0, Total=3660 [2020-10-21 22:40:31,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-21 22:40:31,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 118. [2020-10-21 22:40:31,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-21 22:40:31,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 303 transitions. [2020-10-21 22:40:31,169 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 303 transitions. Word has length 36 [2020-10-21 22:40:31,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:40:31,169 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 303 transitions. [2020-10-21 22:40:31,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-21 22:40:31,170 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 303 transitions. [2020-10-21 22:40:31,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-21 22:40:31,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:40:31,170 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:40:31,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:31,371 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:40:31,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:40:31,372 INFO L82 PathProgramCache]: Analyzing trace with hash -668005337, now seen corresponding path program 67 times [2020-10-21 22:40:31,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:40:31,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822450425] [2020-10-21 22:40:31,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:40:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:40:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:31,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822450425] [2020-10-21 22:40:31,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524574181] [2020-10-21 22:40:31,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:31,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:40:31,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-21 22:40:31,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:40:31,973 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:40:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:32,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:40:32,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-10-21 22:40:32,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278693898] [2020-10-21 22:40:32,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-21 22:40:32,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:40:32,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-21 22:40:32,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=807, Unknown=0, NotChecked=0, Total=1056 [2020-10-21 22:40:32,006 INFO L87 Difference]: Start difference. First operand 118 states and 303 transitions. Second operand 33 states. [2020-10-21 22:40:34,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:40:34,385 INFO L93 Difference]: Finished difference Result 183 states and 437 transitions. [2020-10-21 22:40:34,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-21 22:40:34,386 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-10-21 22:40:34,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:40:34,387 INFO L225 Difference]: With dead ends: 183 [2020-10-21 22:40:34,387 INFO L226 Difference]: Without dead ends: 178 [2020-10-21 22:40:34,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2558, Invalid=5452, Unknown=0, NotChecked=0, Total=8010 [2020-10-21 22:40:34,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-21 22:40:34,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 89. [2020-10-21 22:40:34,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-21 22:40:34,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 217 transitions. [2020-10-21 22:40:34,390 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 217 transitions. Word has length 36 [2020-10-21 22:40:34,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:40:34,391 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 217 transitions. [2020-10-21 22:40:34,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-21 22:40:34,391 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 217 transitions. [2020-10-21 22:40:34,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-21 22:40:34,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:40:34,391 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:40:34,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-21 22:40:34,600 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:40:34,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:40:34,601 INFO L82 PathProgramCache]: Analyzing trace with hash -184915801, now seen corresponding path program 68 times [2020-10-21 22:40:34,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:40:34,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213017542] [2020-10-21 22:40:34,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:40:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:40:35,095 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:35,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213017542] [2020-10-21 22:40:35,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084387374] [2020-10-21 22:40:35,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:35,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:40:35,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:40:35,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-21 22:40:35,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:40:35,195 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:40:35,219 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:35,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:40:35,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-10-21 22:40:35,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867291601] [2020-10-21 22:40:35,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-21 22:40:35,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:40:35,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-21 22:40:35,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-10-21 22:40:35,221 INFO L87 Difference]: Start difference. First operand 89 states and 217 transitions. Second operand 33 states. [2020-10-21 22:40:37,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:40:37,738 INFO L93 Difference]: Finished difference Result 191 states and 455 transitions. [2020-10-21 22:40:37,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-21 22:40:37,739 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-10-21 22:40:37,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:40:37,741 INFO L225 Difference]: With dead ends: 191 [2020-10-21 22:40:37,741 INFO L226 Difference]: Without dead ends: 182 [2020-10-21 22:40:37,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2216 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2481, Invalid=5529, Unknown=0, NotChecked=0, Total=8010 [2020-10-21 22:40:37,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-21 22:40:37,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 119. [2020-10-21 22:40:37,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-21 22:40:37,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 307 transitions. [2020-10-21 22:40:37,745 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 307 transitions. Word has length 36 [2020-10-21 22:40:37,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:40:37,745 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 307 transitions. [2020-10-21 22:40:37,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-21 22:40:37,745 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 307 transitions. [2020-10-21 22:40:37,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-21 22:40:37,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:40:37,746 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:40:37,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-21 22:40:37,947 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:40:37,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:40:37,949 INFO L82 PathProgramCache]: Analyzing trace with hash 766696248, now seen corresponding path program 69 times [2020-10-21 22:40:37,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:40:37,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977023552] [2020-10-21 22:40:37,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:40:37,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:40:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:38,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977023552] [2020-10-21 22:40:38,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243251086] [2020-10-21 22:40:38,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:38,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-10-21 22:40:38,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:40:38,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-21 22:40:38,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:40:38,662 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:38,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:40:38,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-10-21 22:40:38,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047823602] [2020-10-21 22:40:38,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-21 22:40:38,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:40:38,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-21 22:40:38,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=858, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 22:40:38,664 INFO L87 Difference]: Start difference. First operand 119 states and 307 transitions. Second operand 34 states. [2020-10-21 22:40:41,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:40:41,117 INFO L93 Difference]: Finished difference Result 192 states and 457 transitions. [2020-10-21 22:40:41,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-21 22:40:41,117 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-10-21 22:40:41,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:40:41,119 INFO L225 Difference]: With dead ends: 192 [2020-10-21 22:40:41,119 INFO L226 Difference]: Without dead ends: 183 [2020-10-21 22:40:41,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2353 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2371, Invalid=6185, Unknown=0, NotChecked=0, Total=8556 [2020-10-21 22:40:41,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-21 22:40:41,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 89. [2020-10-21 22:40:41,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-21 22:40:41,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 217 transitions. [2020-10-21 22:40:41,127 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 217 transitions. Word has length 37 [2020-10-21 22:40:41,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:40:41,127 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 217 transitions. [2020-10-21 22:40:41,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-21 22:40:41,127 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 217 transitions. [2020-10-21 22:40:41,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-21 22:40:41,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:40:41,128 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:40:41,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:41,329 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:40:41,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:40:41,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1437394437, now seen corresponding path program 70 times [2020-10-21 22:40:41,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:40:41,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631974363] [2020-10-21 22:40:41,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:40:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:40:41,986 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:41,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631974363] [2020-10-21 22:40:41,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938058888] [2020-10-21 22:40:41,987 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:42,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:40:42,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:40:42,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 33 conjunts are in the unsatisfiable core [2020-10-21 22:40:42,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:40:42,139 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:40:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:42,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:40:42,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-10-21 22:40:42,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577475485] [2020-10-21 22:40:42,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-21 22:40:42,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:40:42,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-21 22:40:42,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 22:40:42,191 INFO L87 Difference]: Start difference. First operand 89 states and 217 transitions. Second operand 34 states. [2020-10-21 22:40:44,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:40:44,840 INFO L93 Difference]: Finished difference Result 160 states and 393 transitions. [2020-10-21 22:40:44,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-21 22:40:44,841 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-10-21 22:40:44,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:40:44,843 INFO L225 Difference]: With dead ends: 160 [2020-10-21 22:40:44,843 INFO L226 Difference]: Without dead ends: 155 [2020-10-21 22:40:44,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2237 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2581, Invalid=5609, Unknown=0, NotChecked=0, Total=8190 [2020-10-21 22:40:44,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-21 22:40:44,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-21 22:40:44,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-21 22:40:44,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 313 transitions. [2020-10-21 22:40:44,846 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 313 transitions. Word has length 37 [2020-10-21 22:40:44,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:40:44,846 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 313 transitions. [2020-10-21 22:40:44,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-21 22:40:44,847 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 313 transitions. [2020-10-21 22:40:44,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-21 22:40:44,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:40:44,847 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:40:45,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:45,057 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:40:45,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:40:45,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1000859528, now seen corresponding path program 71 times [2020-10-21 22:40:45,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:40:45,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390279842] [2020-10-21 22:40:45,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:40:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:40:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:45,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390279842] [2020-10-21 22:40:45,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466168553] [2020-10-21 22:40:45,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:45,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-10-21 22:40:45,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:40:45,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 35 conjunts are in the unsatisfiable core [2020-10-21 22:40:45,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:40:45,894 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:40:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:45,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:40:45,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-10-21 22:40:45,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627473051] [2020-10-21 22:40:45,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-21 22:40:45,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:40:45,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-21 22:40:45,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 22:40:45,906 INFO L87 Difference]: Start difference. First operand 121 states and 313 transitions. Second operand 34 states. [2020-10-21 22:40:47,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:40:47,130 INFO L93 Difference]: Finished difference Result 160 states and 391 transitions. [2020-10-21 22:40:47,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-21 22:40:47,131 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 38 [2020-10-21 22:40:47,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:40:47,132 INFO L225 Difference]: With dead ends: 160 [2020-10-21 22:40:47,132 INFO L226 Difference]: Without dead ends: 154 [2020-10-21 22:40:47,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1344, Invalid=2816, Unknown=0, NotChecked=0, Total=4160 [2020-10-21 22:40:47,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-21 22:40:47,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-10-21 22:40:47,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-21 22:40:47,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 319 transitions. [2020-10-21 22:40:47,136 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 319 transitions. Word has length 38 [2020-10-21 22:40:47,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:40:47,136 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 319 transitions. [2020-10-21 22:40:47,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-21 22:40:47,136 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 319 transitions. [2020-10-21 22:40:47,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-21 22:40:47,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:40:47,137 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:40:47,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:47,337 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:40:47,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:40:47,338 INFO L82 PathProgramCache]: Analyzing trace with hash -2002191990, now seen corresponding path program 72 times [2020-10-21 22:40:47,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:40:47,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342090786] [2020-10-21 22:40:47,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:40:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:40:47,919 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:47,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342090786] [2020-10-21 22:40:47,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985267445] [2020-10-21 22:40:47,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:47,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-10-21 22:40:47,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:40:47,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-21 22:40:47,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:40:48,037 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:40:48,071 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:48,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:40:48,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-10-21 22:40:48,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908319644] [2020-10-21 22:40:48,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-21 22:40:48,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:40:48,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-21 22:40:48,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2020-10-21 22:40:48,073 INFO L87 Difference]: Start difference. First operand 124 states and 319 transitions. Second operand 35 states. [2020-10-21 22:40:50,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:40:50,813 INFO L93 Difference]: Finished difference Result 193 states and 461 transitions. [2020-10-21 22:40:50,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-21 22:40:50,813 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-10-21 22:40:50,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:40:50,814 INFO L225 Difference]: With dead ends: 193 [2020-10-21 22:40:50,814 INFO L226 Difference]: Without dead ends: 188 [2020-10-21 22:40:50,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2680 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2905, Invalid=6215, Unknown=0, NotChecked=0, Total=9120 [2020-10-21 22:40:50,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-21 22:40:50,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 93. [2020-10-21 22:40:50,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-21 22:40:50,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 227 transitions. [2020-10-21 22:40:50,818 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 227 transitions. Word has length 38 [2020-10-21 22:40:50,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:40:50,818 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 227 transitions. [2020-10-21 22:40:50,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-21 22:40:50,819 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 227 transitions. [2020-10-21 22:40:50,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-21 22:40:50,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:40:50,819 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:40:51,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:51,028 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:40:51,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:40:51,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1609529372, now seen corresponding path program 73 times [2020-10-21 22:40:51,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:40:51,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628812118] [2020-10-21 22:40:51,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:40:51,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:40:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:51,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628812118] [2020-10-21 22:40:51,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039149204] [2020-10-21 22:40:51,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:51,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:40:51,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-21 22:40:51,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:40:51,939 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:40:51,981 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:51,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:40:51,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-10-21 22:40:51,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686417829] [2020-10-21 22:40:51,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-21 22:40:51,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:40:51,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-21 22:40:51,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2020-10-21 22:40:51,984 INFO L87 Difference]: Start difference. First operand 93 states and 227 transitions. Second operand 35 states. [2020-10-21 22:40:54,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:40:54,918 INFO L93 Difference]: Finished difference Result 201 states and 479 transitions. [2020-10-21 22:40:54,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-21 22:40:54,919 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-10-21 22:40:54,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:40:54,920 INFO L225 Difference]: With dead ends: 201 [2020-10-21 22:40:54,920 INFO L226 Difference]: Without dead ends: 192 [2020-10-21 22:40:54,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2822, Invalid=6298, Unknown=0, NotChecked=0, Total=9120 [2020-10-21 22:40:54,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-21 22:40:54,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 125. [2020-10-21 22:40:54,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-21 22:40:54,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 323 transitions. [2020-10-21 22:40:54,925 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 323 transitions. Word has length 38 [2020-10-21 22:40:54,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:40:54,925 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 323 transitions. [2020-10-21 22:40:54,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-21 22:40:54,925 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 323 transitions. [2020-10-21 22:40:54,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-21 22:40:54,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:40:54,926 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:40:55,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-21 22:40:55,137 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:40:55,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:40:55,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1938384331, now seen corresponding path program 74 times [2020-10-21 22:40:55,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:40:55,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113733885] [2020-10-21 22:40:55,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:40:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:40:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:55,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113733885] [2020-10-21 22:40:55,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295753450] [2020-10-21 22:40:55,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:55,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:40:55,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:40:55,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 35 conjunts are in the unsatisfiable core [2020-10-21 22:40:55,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:40:55,869 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:40:55,900 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:55,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:40:55,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-10-21 22:40:55,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953705057] [2020-10-21 22:40:55,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-21 22:40:55,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:40:55,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-21 22:40:55,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=963, Unknown=0, NotChecked=0, Total=1260 [2020-10-21 22:40:55,902 INFO L87 Difference]: Start difference. First operand 125 states and 323 transitions. Second operand 36 states. [2020-10-21 22:40:58,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:40:58,869 INFO L93 Difference]: Finished difference Result 202 states and 481 transitions. [2020-10-21 22:40:58,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-21 22:40:58,870 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-10-21 22:40:58,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:40:58,872 INFO L225 Difference]: With dead ends: 202 [2020-10-21 22:40:58,872 INFO L226 Difference]: Without dead ends: 193 [2020-10-21 22:40:58,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2799 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2999, Invalid=6703, Unknown=0, NotChecked=0, Total=9702 [2020-10-21 22:40:58,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-21 22:40:58,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 93. [2020-10-21 22:40:58,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-21 22:40:58,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 227 transitions. [2020-10-21 22:40:58,876 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 227 transitions. Word has length 39 [2020-10-21 22:40:58,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:40:58,876 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 227 transitions. [2020-10-21 22:40:58,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-21 22:40:58,877 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 227 transitions. [2020-10-21 22:40:58,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-21 22:40:58,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:40:58,877 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:40:59,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:59,082 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:40:59,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:40:59,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1644225118, now seen corresponding path program 75 times [2020-10-21 22:40:59,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:40:59,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139004481] [2020-10-21 22:40:59,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:40:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:40:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:59,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139004481] [2020-10-21 22:40:59,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189856892] [2020-10-21 22:40:59,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:40:59,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-10-21 22:40:59,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:40:59,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 35 conjunts are in the unsatisfiable core [2020-10-21 22:40:59,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:40:59,841 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:40:59,876 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:40:59,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:40:59,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-10-21 22:40:59,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464197541] [2020-10-21 22:40:59,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-21 22:40:59,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:40:59,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-21 22:40:59,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2020-10-21 22:40:59,878 INFO L87 Difference]: Start difference. First operand 93 states and 227 transitions. Second operand 36 states. [2020-10-21 22:41:02,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:41:02,897 INFO L93 Difference]: Finished difference Result 168 states and 413 transitions. [2020-10-21 22:41:02,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-21 22:41:02,898 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-10-21 22:41:02,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:41:02,900 INFO L225 Difference]: With dead ends: 168 [2020-10-21 22:41:02,900 INFO L226 Difference]: Without dead ends: 163 [2020-10-21 22:41:02,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2562 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2929, Invalid=6383, Unknown=0, NotChecked=0, Total=9312 [2020-10-21 22:41:02,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-21 22:41:02,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 127. [2020-10-21 22:41:02,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-21 22:41:02,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 329 transitions. [2020-10-21 22:41:02,903 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 329 transitions. Word has length 39 [2020-10-21 22:41:02,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:41:02,903 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 329 transitions. [2020-10-21 22:41:02,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-21 22:41:02,903 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 329 transitions. [2020-10-21 22:41:02,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-21 22:41:02,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:41:02,904 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:41:03,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-21 22:41:03,107 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:41:03,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:41:03,107 INFO L82 PathProgramCache]: Analyzing trace with hash 246674139, now seen corresponding path program 76 times [2020-10-21 22:41:03,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:41:03,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001633862] [2020-10-21 22:41:03,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:41:03,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:41:03,978 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:41:03,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001633862] [2020-10-21 22:41:03,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496041745] [2020-10-21 22:41:03,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:41:04,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:41:04,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:41:04,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-21 22:41:04,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:41:04,044 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:41:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:41:04,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:41:04,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-10-21 22:41:04,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502273017] [2020-10-21 22:41:04,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-21 22:41:04,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:41:04,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-21 22:41:04,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-10-21 22:41:04,077 INFO L87 Difference]: Start difference. First operand 127 states and 329 transitions. Second operand 36 states. [2020-10-21 22:41:05,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:41:05,643 INFO L93 Difference]: Finished difference Result 168 states and 411 transitions. [2020-10-21 22:41:05,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-21 22:41:05,644 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2020-10-21 22:41:05,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:41:05,646 INFO L225 Difference]: With dead ends: 168 [2020-10-21 22:41:05,646 INFO L226 Difference]: Without dead ends: 162 [2020-10-21 22:41:05,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1513, Invalid=3179, Unknown=0, NotChecked=0, Total=4692 [2020-10-21 22:41:05,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-21 22:41:05,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 130. [2020-10-21 22:41:05,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-21 22:41:05,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 335 transitions. [2020-10-21 22:41:05,649 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 335 transitions. Word has length 40 [2020-10-21 22:41:05,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:41:05,650 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 335 transitions. [2020-10-21 22:41:05,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-21 22:41:05,650 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 335 transitions. [2020-10-21 22:41:05,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-21 22:41:05,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:41:05,650 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:41:05,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:41:05,851 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:41:05,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:41:05,852 INFO L82 PathProgramCache]: Analyzing trace with hash 39655981, now seen corresponding path program 77 times [2020-10-21 22:41:05,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:41:05,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529919932] [2020-10-21 22:41:05,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:41:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:41:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:41:06,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529919932] [2020-10-21 22:41:06,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344270475] [2020-10-21 22:41:06,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:41:06,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-10-21 22:41:06,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:41:06,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-21 22:41:06,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:41:06,643 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:41:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:41:06,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:41:06,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-10-21 22:41:06,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694447076] [2020-10-21 22:41:06,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-21 22:41:06,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:41:06,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-21 22:41:06,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2020-10-21 22:41:06,681 INFO L87 Difference]: Start difference. First operand 130 states and 335 transitions. Second operand 37 states. [2020-10-21 22:41:09,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:41:09,847 INFO L93 Difference]: Finished difference Result 203 states and 485 transitions. [2020-10-21 22:41:09,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-21 22:41:09,848 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-10-21 22:41:09,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:41:09,850 INFO L225 Difference]: With dead ends: 203 [2020-10-21 22:41:09,850 INFO L226 Difference]: Without dead ends: 198 [2020-10-21 22:41:09,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3038 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3274, Invalid=7028, Unknown=0, NotChecked=0, Total=10302 [2020-10-21 22:41:09,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-21 22:41:09,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 97. [2020-10-21 22:41:09,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-21 22:41:09,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 237 transitions. [2020-10-21 22:41:09,854 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 237 transitions. Word has length 40 [2020-10-21 22:41:09,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:41:09,854 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 237 transitions. [2020-10-21 22:41:09,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-21 22:41:09,854 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 237 transitions. [2020-10-21 22:41:09,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-21 22:41:09,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:41:09,855 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:41:10,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-21 22:41:10,064 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:41:10,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:41:10,064 INFO L82 PathProgramCache]: Analyzing trace with hash -568603679, now seen corresponding path program 78 times [2020-10-21 22:41:10,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:41:10,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648253657] [2020-10-21 22:41:10,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:41:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:41:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:41:10,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648253657] [2020-10-21 22:41:10,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569061435] [2020-10-21 22:41:10,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:41:10,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-10-21 22:41:10,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:41:10,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-21 22:41:10,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:41:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:41:10,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:41:10,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-10-21 22:41:10,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828514594] [2020-10-21 22:41:10,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-21 22:41:10,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:41:10,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-21 22:41:10,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1018, Unknown=0, NotChecked=0, Total=1332 [2020-10-21 22:41:10,903 INFO L87 Difference]: Start difference. First operand 97 states and 237 transitions. Second operand 37 states. [2020-10-21 22:41:13,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:41:13,901 INFO L93 Difference]: Finished difference Result 211 states and 503 transitions. [2020-10-21 22:41:13,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-21 22:41:13,902 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-10-21 22:41:13,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:41:13,903 INFO L225 Difference]: With dead ends: 211 [2020-10-21 22:41:13,903 INFO L226 Difference]: Without dead ends: 202 [2020-10-21 22:41:13,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2702, Invalid=7198, Unknown=0, NotChecked=0, Total=9900 [2020-10-21 22:41:13,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-21 22:41:13,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 131. [2020-10-21 22:41:13,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-21 22:41:13,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 339 transitions. [2020-10-21 22:41:13,907 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 339 transitions. Word has length 40 [2020-10-21 22:41:13,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:41:13,907 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 339 transitions. [2020-10-21 22:41:13,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-21 22:41:13,907 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 339 transitions. [2020-10-21 22:41:13,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-21 22:41:13,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:41:13,907 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:41:14,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:41:14,108 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:41:14,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:41:14,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1229360626, now seen corresponding path program 79 times [2020-10-21 22:41:14,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:41:14,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380124402] [2020-10-21 22:41:14,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:41:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:41:14,829 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:41:14,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380124402] [2020-10-21 22:41:14,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597260509] [2020-10-21 22:41:14,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:41:14,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:41:14,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-21 22:41:14,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:41:14,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:41:14,978 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:41:14,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:41:14,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-10-21 22:41:14,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767829864] [2020-10-21 22:41:14,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-21 22:41:14,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:41:14,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-21 22:41:14,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2020-10-21 22:41:14,980 INFO L87 Difference]: Start difference. First operand 131 states and 339 transitions. Second operand 38 states. [2020-10-21 22:41:18,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:41:18,357 INFO L93 Difference]: Finished difference Result 212 states and 505 transitions. [2020-10-21 22:41:18,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-21 22:41:18,358 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2020-10-21 22:41:18,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:41:18,359 INFO L225 Difference]: With dead ends: 212 [2020-10-21 22:41:18,359 INFO L226 Difference]: Without dead ends: 203 [2020-10-21 22:41:18,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3164 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3373, Invalid=7547, Unknown=0, NotChecked=0, Total=10920 [2020-10-21 22:41:18,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-21 22:41:18,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 97. [2020-10-21 22:41:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-21 22:41:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 237 transitions. [2020-10-21 22:41:18,363 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 237 transitions. Word has length 41 [2020-10-21 22:41:18,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:41:18,363 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 237 transitions. [2020-10-21 22:41:18,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-21 22:41:18,363 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 237 transitions. [2020-10-21 22:41:18,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-21 22:41:18,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:41:18,364 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:41:18,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:41:18,565 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:41:18,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:41:18,565 INFO L82 PathProgramCache]: Analyzing trace with hash -446816767, now seen corresponding path program 80 times [2020-10-21 22:41:18,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:41:18,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490224161] [2020-10-21 22:41:18,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:41:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:41:19,293 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:41:19,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490224161] [2020-10-21 22:41:19,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398225141] [2020-10-21 22:41:19,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:41:19,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:41:19,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:41:19,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-21 22:41:19,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:41:19,405 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:41:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:41:19,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:41:19,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-10-21 22:41:19,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285466326] [2020-10-21 22:41:19,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-21 22:41:19,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:41:19,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-21 22:41:19,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1073, Unknown=0, NotChecked=0, Total=1406 [2020-10-21 22:41:19,448 INFO L87 Difference]: Start difference. First operand 97 states and 237 transitions. Second operand 38 states. [2020-10-21 22:41:22,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:41:22,822 INFO L93 Difference]: Finished difference Result 176 states and 433 transitions. [2020-10-21 22:41:22,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-21 22:41:22,822 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2020-10-21 22:41:22,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:41:22,823 INFO L225 Difference]: With dead ends: 176 [2020-10-21 22:41:22,824 INFO L226 Difference]: Without dead ends: 171 [2020-10-21 22:41:22,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2909 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3299, Invalid=7207, Unknown=0, NotChecked=0, Total=10506 [2020-10-21 22:41:22,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-21 22:41:22,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 133. [2020-10-21 22:41:22,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-21 22:41:22,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 345 transitions. [2020-10-21 22:41:22,827 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 345 transitions. Word has length 41 [2020-10-21 22:41:22,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:41:22,827 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 345 transitions. [2020-10-21 22:41:22,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-21 22:41:22,828 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 345 transitions. [2020-10-21 22:41:22,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-21 22:41:22,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:41:22,828 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:41:23,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:41:23,029 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:41:23,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:41:23,030 INFO L82 PathProgramCache]: Analyzing trace with hash 830652542, now seen corresponding path program 81 times [2020-10-21 22:41:23,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:41:23,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399637807] [2020-10-21 22:41:23,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:41:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:41:24,010 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:41:24,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399637807] [2020-10-21 22:41:24,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603689157] [2020-10-21 22:41:24,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:41:24,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2020-10-21 22:41:24,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:41:24,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 39 conjunts are in the unsatisfiable core [2020-10-21 22:41:24,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:41:24,090 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:41:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:41:24,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:41:24,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2020-10-21 22:41:24,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123776139] [2020-10-21 22:41:24,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-21 22:41:24,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:41:24,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-21 22:41:24,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-10-21 22:41:24,105 INFO L87 Difference]: Start difference. First operand 133 states and 345 transitions. Second operand 38 states. [2020-10-21 22:41:25,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:41:25,681 INFO L93 Difference]: Finished difference Result 176 states and 431 transitions. [2020-10-21 22:41:25,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-21 22:41:25,682 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 42 [2020-10-21 22:41:25,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:41:25,684 INFO L225 Difference]: With dead ends: 176 [2020-10-21 22:41:25,684 INFO L226 Difference]: Without dead ends: 170 [2020-10-21 22:41:25,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1692, Invalid=3564, Unknown=0, NotChecked=0, Total=5256 [2020-10-21 22:41:25,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-21 22:41:25,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-21 22:41:25,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-21 22:41:25,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 351 transitions. [2020-10-21 22:41:25,688 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 351 transitions. Word has length 42 [2020-10-21 22:41:25,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:41:25,688 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 351 transitions. [2020-10-21 22:41:25,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-21 22:41:25,688 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 351 transitions. [2020-10-21 22:41:25,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-21 22:41:25,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:41:25,689 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:41:25,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:41:25,900 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:41:25,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:41:25,900 INFO L82 PathProgramCache]: Analyzing trace with hash -544498160, now seen corresponding path program 82 times [2020-10-21 22:41:25,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:41:25,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853682341] [2020-10-21 22:41:25,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:41:25,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:41:26,666 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:41:26,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853682341] [2020-10-21 22:41:26,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181820880] [2020-10-21 22:41:26,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:41:26,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:41:26,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:41:26,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2020-10-21 22:41:26,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:41:26,781 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:41:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:41:26,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:41:26,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-10-21 22:41:26,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527738401] [2020-10-21 22:41:26,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-21 22:41:26,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:41:26,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-21 22:41:26,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2020-10-21 22:41:26,822 INFO L87 Difference]: Start difference. First operand 136 states and 351 transitions. Second operand 39 states. [2020-10-21 22:41:30,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:41:30,334 INFO L93 Difference]: Finished difference Result 213 states and 509 transitions. [2020-10-21 22:41:30,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-21 22:41:30,335 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2020-10-21 22:41:30,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:41:30,336 INFO L225 Difference]: With dead ends: 213 [2020-10-21 22:41:30,337 INFO L226 Difference]: Without dead ends: 208 [2020-10-21 22:41:30,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3418 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3665, Invalid=7891, Unknown=0, NotChecked=0, Total=11556 [2020-10-21 22:41:30,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-21 22:41:30,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 101. [2020-10-21 22:41:30,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-21 22:41:30,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-21 22:41:30,340 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 42 [2020-10-21 22:41:30,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:41:30,340 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-21 22:41:30,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-21 22:41:30,340 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-21 22:41:30,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-21 22:41:30,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:41:30,341 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:41:30,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:41:30,542 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:41:30,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:41:30,543 INFO L82 PathProgramCache]: Analyzing trace with hash -966392674, now seen corresponding path program 83 times [2020-10-21 22:41:30,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:41:30,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848400642] [2020-10-21 22:41:30,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:41:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:41:31,319 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:41:31,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848400642] [2020-10-21 22:41:31,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231526473] [2020-10-21 22:41:31,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:41:31,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-10-21 22:41:31,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:41:31,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2020-10-21 22:41:31,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:41:31,447 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:41:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:41:31,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:41:31,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-10-21 22:41:31,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491389976] [2020-10-21 22:41:31,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-21 22:41:31,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:41:31,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-21 22:41:31,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1132, Unknown=0, NotChecked=0, Total=1482 [2020-10-21 22:41:31,480 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 39 states. [2020-10-21 22:41:35,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:41:35,182 INFO L93 Difference]: Finished difference Result 221 states and 527 transitions. [2020-10-21 22:41:35,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-21 22:41:35,183 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2020-10-21 22:41:35,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:41:35,184 INFO L225 Difference]: With dead ends: 221 [2020-10-21 22:41:35,185 INFO L226 Difference]: Without dead ends: 212 [2020-10-21 22:41:35,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3254 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3570, Invalid=7986, Unknown=0, NotChecked=0, Total=11556 [2020-10-21 22:41:35,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-21 22:41:35,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 137. [2020-10-21 22:41:35,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-21 22:41:35,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 355 transitions. [2020-10-21 22:41:35,188 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 355 transitions. Word has length 42 [2020-10-21 22:41:35,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:41:35,189 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 355 transitions. [2020-10-21 22:41:35,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-21 22:41:35,189 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 355 transitions. [2020-10-21 22:41:35,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-21 22:41:35,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:41:35,190 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:41:35,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:41:35,394 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:41:35,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:41:35,394 INFO L82 PathProgramCache]: Analyzing trace with hash 300451439, now seen corresponding path program 84 times [2020-10-21 22:41:35,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:41:35,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443224827] [2020-10-21 22:41:35,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:41:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:41:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:41:36,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443224827] [2020-10-21 22:41:36,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572955537] [2020-10-21 22:41:36,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:41:36,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2020-10-21 22:41:36,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:41:36,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2020-10-21 22:41:36,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:41:36,343 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:41:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:41:36,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:41:36,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-10-21 22:41:36,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374871002] [2020-10-21 22:41:36,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-21 22:41:36,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:41:36,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-21 22:41:36,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2020-10-21 22:41:36,381 INFO L87 Difference]: Start difference. First operand 137 states and 355 transitions. Second operand 40 states. [2020-10-21 22:41:40,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:41:40,232 INFO L93 Difference]: Finished difference Result 222 states and 529 transitions. [2020-10-21 22:41:40,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-21 22:41:40,233 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2020-10-21 22:41:40,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:41:40,235 INFO L225 Difference]: With dead ends: 222 [2020-10-21 22:41:40,235 INFO L226 Difference]: Without dead ends: 213 [2020-10-21 22:41:40,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3551 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3769, Invalid=8441, Unknown=0, NotChecked=0, Total=12210 [2020-10-21 22:41:40,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-21 22:41:40,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 101. [2020-10-21 22:41:40,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-21 22:41:40,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-21 22:41:40,239 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 43 [2020-10-21 22:41:40,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:41:40,240 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-21 22:41:40,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-21 22:41:40,240 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-21 22:41:40,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-21 22:41:40,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:41:40,241 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:41:40,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:41:40,441 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:41:40,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:41:40,442 INFO L82 PathProgramCache]: Analyzing trace with hash 106626276, now seen corresponding path program 85 times [2020-10-21 22:41:40,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:41:40,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171506784] [2020-10-21 22:41:40,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:41:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:41:41,270 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:41:41,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171506784] [2020-10-21 22:41:41,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041180018] [2020-10-21 22:41:41,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:41:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:41:41,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2020-10-21 22:41:41,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:41:41,380 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:41:41,425 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:41:41,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:41:41,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-10-21 22:41:41,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277891435] [2020-10-21 22:41:41,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-21 22:41:41,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:41:41,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-21 22:41:41,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2020-10-21 22:41:41,427 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 40 states. [2020-10-21 22:41:45,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:41:45,236 INFO L93 Difference]: Finished difference Result 184 states and 453 transitions. [2020-10-21 22:41:45,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-21 22:41:45,237 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2020-10-21 22:41:45,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:41:45,238 INFO L225 Difference]: With dead ends: 184 [2020-10-21 22:41:45,238 INFO L226 Difference]: Without dead ends: 179 [2020-10-21 22:41:45,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3278 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3691, Invalid=8081, Unknown=0, NotChecked=0, Total=11772 [2020-10-21 22:41:45,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-21 22:41:45,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 139. [2020-10-21 22:41:45,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-21 22:41:45,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 361 transitions. [2020-10-21 22:41:45,242 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 361 transitions. Word has length 43 [2020-10-21 22:41:45,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:41:45,242 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 361 transitions. [2020-10-21 22:41:45,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-21 22:41:45,242 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 361 transitions. [2020-10-21 22:41:45,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-21 22:41:45,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:41:45,243 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:41:45,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-21 22:41:45,443 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:41:45,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:41:45,444 INFO L82 PathProgramCache]: Analyzing trace with hash -606817951, now seen corresponding path program 86 times [2020-10-21 22:41:45,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:41:45,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417416158] [2020-10-21 22:41:45,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:41:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:41:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:41:46,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417416158] [2020-10-21 22:41:46,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572678949] [2020-10-21 22:41:46,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:41:46,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:41:46,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:41:46,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 41 conjunts are in the unsatisfiable core [2020-10-21 22:41:46,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:41:46,642 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:41:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:41:46,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:41:46,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2020-10-21 22:41:46,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483340761] [2020-10-21 22:41:46,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-21 22:41:46,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:41:46,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-21 22:41:46,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-10-21 22:41:46,659 INFO L87 Difference]: Start difference. First operand 139 states and 361 transitions. Second operand 40 states. [2020-10-21 22:41:48,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:41:48,435 INFO L93 Difference]: Finished difference Result 184 states and 451 transitions. [2020-10-21 22:41:48,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-21 22:41:48,436 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 44 [2020-10-21 22:41:48,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:41:48,437 INFO L225 Difference]: With dead ends: 184 [2020-10-21 22:41:48,438 INFO L226 Difference]: Without dead ends: 178 [2020-10-21 22:41:48,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1881, Invalid=3971, Unknown=0, NotChecked=0, Total=5852 [2020-10-21 22:41:48,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-21 22:41:48,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 142. [2020-10-21 22:41:48,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-21 22:41:48,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 367 transitions. [2020-10-21 22:41:48,442 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 367 transitions. Word has length 44 [2020-10-21 22:41:48,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:41:48,442 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 367 transitions. [2020-10-21 22:41:48,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-21 22:41:48,442 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 367 transitions. [2020-10-21 22:41:48,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-21 22:41:48,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:41:48,443 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:41:48,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:41:48,651 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:41:48,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:41:48,651 INFO L82 PathProgramCache]: Analyzing trace with hash 724088115, now seen corresponding path program 87 times [2020-10-21 22:41:48,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:41:48,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671909572] [2020-10-21 22:41:48,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:41:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:41:49,541 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:41:49,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671909572] [2020-10-21 22:41:49,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160699223] [2020-10-21 22:41:49,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:41:49,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-10-21 22:41:49,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:41:49,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 40 conjunts are in the unsatisfiable core [2020-10-21 22:41:49,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:41:49,675 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:41:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:41:49,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:41:49,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-10-21 22:41:49,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140186504] [2020-10-21 22:41:49,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-21 22:41:49,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:41:49,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-21 22:41:49,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=1251, Unknown=0, NotChecked=0, Total=1640 [2020-10-21 22:41:49,722 INFO L87 Difference]: Start difference. First operand 142 states and 367 transitions. Second operand 41 states. [2020-10-21 22:41:53,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:41:53,783 INFO L93 Difference]: Finished difference Result 223 states and 533 transitions. [2020-10-21 22:41:53,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-21 22:41:53,784 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2020-10-21 22:41:53,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:41:53,786 INFO L225 Difference]: With dead ends: 223 [2020-10-21 22:41:53,786 INFO L226 Difference]: Without dead ends: 218 [2020-10-21 22:41:53,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3820 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4078, Invalid=8804, Unknown=0, NotChecked=0, Total=12882 [2020-10-21 22:41:53,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-21 22:41:53,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 105. [2020-10-21 22:41:53,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-21 22:41:53,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-21 22:41:53,790 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 44 [2020-10-21 22:41:53,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:41:53,790 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-21 22:41:53,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-21 22:41:53,790 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-21 22:41:53,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-21 22:41:53,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:41:53,791 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:41:53,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-21 22:41:53,992 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:41:53,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:41:53,992 INFO L82 PathProgramCache]: Analyzing trace with hash -989527525, now seen corresponding path program 88 times [2020-10-21 22:41:53,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:41:53,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716690704] [2020-10-21 22:41:53,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:41:54,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:41:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:41:54,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716690704] [2020-10-21 22:41:54,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478420240] [2020-10-21 22:41:54,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:41:54,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:41:54,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:41:54,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 40 conjunts are in the unsatisfiable core [2020-10-21 22:41:54,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:41:55,011 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:41:55,048 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:41:55,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:41:55,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-10-21 22:41:55,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038892028] [2020-10-21 22:41:55,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-21 22:41:55,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:41:55,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-21 22:41:55,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1252, Unknown=0, NotChecked=0, Total=1640 [2020-10-21 22:41:55,050 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 41 states. [2020-10-21 22:41:59,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:41:59,336 INFO L93 Difference]: Finished difference Result 231 states and 551 transitions. [2020-10-21 22:41:59,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-10-21 22:41:59,337 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2020-10-21 22:41:59,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:41:59,338 INFO L225 Difference]: With dead ends: 231 [2020-10-21 22:41:59,339 INFO L226 Difference]: Without dead ends: 222 [2020-10-21 22:41:59,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3644 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3977, Invalid=8905, Unknown=0, NotChecked=0, Total=12882 [2020-10-21 22:41:59,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-21 22:41:59,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 143. [2020-10-21 22:41:59,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-21 22:41:59,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 371 transitions. [2020-10-21 22:41:59,342 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 371 transitions. Word has length 44 [2020-10-21 22:41:59,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:41:59,342 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 371 transitions. [2020-10-21 22:41:59,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-21 22:41:59,343 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 371 transitions. [2020-10-21 22:41:59,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-21 22:41:59,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:41:59,343 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:41:59,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:41:59,546 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:41:59,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:41:59,546 INFO L82 PathProgramCache]: Analyzing trace with hash 971920300, now seen corresponding path program 89 times [2020-10-21 22:41:59,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:41:59,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726370753] [2020-10-21 22:41:59,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:41:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:42:00,530 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:42:00,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726370753] [2020-10-21 22:42:00,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276514928] [2020-10-21 22:42:00,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:42:00,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-10-21 22:42:00,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:42:00,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 41 conjunts are in the unsatisfiable core [2020-10-21 22:42:00,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:42:00,671 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:42:00,725 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:42:00,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:42:00,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-10-21 22:42:00,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727235873] [2020-10-21 22:42:00,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-21 22:42:00,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:42:00,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-21 22:42:00,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2020-10-21 22:42:00,728 INFO L87 Difference]: Start difference. First operand 143 states and 371 transitions. Second operand 42 states. [2020-10-21 22:42:05,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:42:05,249 INFO L93 Difference]: Finished difference Result 232 states and 553 transitions. [2020-10-21 22:42:05,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-21 22:42:05,250 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2020-10-21 22:42:05,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:42:05,251 INFO L225 Difference]: With dead ends: 232 [2020-10-21 22:42:05,252 INFO L226 Difference]: Without dead ends: 223 [2020-10-21 22:42:05,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4187, Invalid=9385, Unknown=0, NotChecked=0, Total=13572 [2020-10-21 22:42:05,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-21 22:42:05,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 105. [2020-10-21 22:42:05,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-21 22:42:05,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-21 22:42:05,255 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 45 [2020-10-21 22:42:05,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:42:05,255 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-21 22:42:05,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-21 22:42:05,256 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-21 22:42:05,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-21 22:42:05,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:42:05,256 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:42:05,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:42:05,465 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:42:05,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:42:05,466 INFO L82 PathProgramCache]: Analyzing trace with hash -610554105, now seen corresponding path program 90 times [2020-10-21 22:42:05,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:42:05,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547249516] [2020-10-21 22:42:05,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:42:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:42:06,421 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:42:06,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547249516] [2020-10-21 22:42:06,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682012244] [2020-10-21 22:42:06,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:42:06,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-10-21 22:42:06,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:42:06,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 41 conjunts are in the unsatisfiable core [2020-10-21 22:42:06,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:42:06,574 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:42:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:42:06,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:42:06,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-10-21 22:42:06,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408417586] [2020-10-21 22:42:06,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-21 22:42:06,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:42:06,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-21 22:42:06,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2020-10-21 22:42:06,625 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 42 states. [2020-10-21 22:42:11,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:42:11,214 INFO L93 Difference]: Finished difference Result 192 states and 473 transitions. [2020-10-21 22:42:11,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-21 22:42:11,215 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2020-10-21 22:42:11,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:42:11,216 INFO L225 Difference]: With dead ends: 192 [2020-10-21 22:42:11,216 INFO L226 Difference]: Without dead ends: 187 [2020-10-21 22:42:11,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3669 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4105, Invalid=9005, Unknown=0, NotChecked=0, Total=13110 [2020-10-21 22:42:11,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-21 22:42:11,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 145. [2020-10-21 22:42:11,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-21 22:42:11,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 377 transitions. [2020-10-21 22:42:11,220 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 377 transitions. Word has length 45 [2020-10-21 22:42:11,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:42:11,220 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 377 transitions. [2020-10-21 22:42:11,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-21 22:42:11,220 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 377 transitions. [2020-10-21 22:42:11,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-21 22:42:11,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:42:11,222 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:42:11,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:42:11,423 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:42:11,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:42:11,423 INFO L82 PathProgramCache]: Analyzing trace with hash 963507588, now seen corresponding path program 91 times [2020-10-21 22:42:11,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:42:11,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586747119] [2020-10-21 22:42:11,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:42:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:42:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:42:12,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586747119] [2020-10-21 22:42:12,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498546351] [2020-10-21 22:42:12,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:42:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:42:12,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 43 conjunts are in the unsatisfiable core [2020-10-21 22:42:12,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:42:12,787 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:42:12,804 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:42:12,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:42:12,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2020-10-21 22:42:12,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389743233] [2020-10-21 22:42:12,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-21 22:42:12,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:42:12,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-21 22:42:12,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-10-21 22:42:12,806 INFO L87 Difference]: Start difference. First operand 145 states and 377 transitions. Second operand 42 states. [2020-10-21 22:42:14,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:42:14,887 INFO L93 Difference]: Finished difference Result 192 states and 471 transitions. [2020-10-21 22:42:14,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-21 22:42:14,888 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 46 [2020-10-21 22:42:14,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:42:14,890 INFO L225 Difference]: With dead ends: 192 [2020-10-21 22:42:14,890 INFO L226 Difference]: Without dead ends: 186 [2020-10-21 22:42:14,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2080, Invalid=4400, Unknown=0, NotChecked=0, Total=6480 [2020-10-21 22:42:14,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-21 22:42:14,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 148. [2020-10-21 22:42:14,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-21 22:42:14,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 383 transitions. [2020-10-21 22:42:14,894 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 383 transitions. Word has length 46 [2020-10-21 22:42:14,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:42:14,895 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 383 transitions. [2020-10-21 22:42:14,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-21 22:42:14,895 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 383 transitions. [2020-10-21 22:42:14,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-21 22:42:14,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:42:14,895 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:42:15,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:42:15,104 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:42:15,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:42:15,105 INFO L82 PathProgramCache]: Analyzing trace with hash 64786326, now seen corresponding path program 92 times [2020-10-21 22:42:15,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:42:15,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627005016] [2020-10-21 22:42:15,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:42:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:42:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:42:16,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627005016] [2020-10-21 22:42:16,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822474097] [2020-10-21 22:42:16,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:42:16,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:42:16,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:42:16,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 42 conjunts are in the unsatisfiable core [2020-10-21 22:42:16,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:42:16,246 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:42:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:42:16,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:42:16,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-10-21 22:42:16,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182602470] [2020-10-21 22:42:16,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-21 22:42:16,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:42:16,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-21 22:42:16,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=1377, Unknown=0, NotChecked=0, Total=1806 [2020-10-21 22:42:16,300 INFO L87 Difference]: Start difference. First operand 148 states and 383 transitions. Second operand 43 states. [2020-10-21 22:42:20,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:42:20,958 INFO L93 Difference]: Finished difference Result 233 states and 557 transitions. [2020-10-21 22:42:20,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-21 22:42:20,959 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2020-10-21 22:42:20,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:42:20,960 INFO L225 Difference]: With dead ends: 233 [2020-10-21 22:42:20,960 INFO L226 Difference]: Without dead ends: 228 [2020-10-21 22:42:20,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4244 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4513, Invalid=9767, Unknown=0, NotChecked=0, Total=14280 [2020-10-21 22:42:20,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-21 22:42:20,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 109. [2020-10-21 22:42:20,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-21 22:42:20,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 267 transitions. [2020-10-21 22:42:20,965 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 267 transitions. Word has length 46 [2020-10-21 22:42:20,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:42:20,965 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 267 transitions. [2020-10-21 22:42:20,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-21 22:42:20,965 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 267 transitions. [2020-10-21 22:42:20,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-21 22:42:20,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:42:20,965 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:42:21,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:42:21,166 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:42:21,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:42:21,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1747282856, now seen corresponding path program 93 times [2020-10-21 22:42:21,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:42:21,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247834621] [2020-10-21 22:42:21,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:42:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:42:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:42:22,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247834621] [2020-10-21 22:42:22,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162931936] [2020-10-21 22:42:22,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:42:22,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2020-10-21 22:42:22,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:42:22,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 43 conjunts are in the unsatisfiable core [2020-10-21 22:42:22,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:42:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:42:22,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:42:22,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-10-21 22:42:22,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728212282] [2020-10-21 22:42:22,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-21 22:42:22,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:42:22,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-21 22:42:22,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1378, Unknown=0, NotChecked=0, Total=1806 [2020-10-21 22:42:22,412 INFO L87 Difference]: Start difference. First operand 109 states and 267 transitions. Second operand 43 states. [2020-10-21 22:42:26,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:42:26,923 INFO L93 Difference]: Finished difference Result 241 states and 575 transitions. [2020-10-21 22:42:26,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-21 22:42:26,924 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2020-10-21 22:42:26,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:42:26,925 INFO L225 Difference]: With dead ends: 241 [2020-10-21 22:42:26,925 INFO L226 Difference]: Without dead ends: 232 [2020-10-21 22:42:26,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3704 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3749, Invalid=10057, Unknown=0, NotChecked=0, Total=13806 [2020-10-21 22:42:26,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-21 22:42:26,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 149. [2020-10-21 22:42:26,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-21 22:42:26,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 387 transitions. [2020-10-21 22:42:26,929 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 387 transitions. Word has length 46 [2020-10-21 22:42:26,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:42:26,929 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 387 transitions. [2020-10-21 22:42:26,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-21 22:42:26,929 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 387 transitions. [2020-10-21 22:42:26,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-21 22:42:26,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:42:26,930 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:42:27,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:42:27,132 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:42:27,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:42:27,132 INFO L82 PathProgramCache]: Analyzing trace with hash 2008401321, now seen corresponding path program 94 times [2020-10-21 22:42:27,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:42:27,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47407890] [2020-10-21 22:42:27,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:42:27,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:42:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:42:28,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47407890] [2020-10-21 22:42:28,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424762099] [2020-10-21 22:42:28,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:42:28,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:42:28,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:42:28,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 43 conjunts are in the unsatisfiable core [2020-10-21 22:42:28,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:42:28,366 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:42:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:42:28,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:42:28,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-10-21 22:42:28,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158774644] [2020-10-21 22:42:28,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-21 22:42:28,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:42:28,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-21 22:42:28,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2020-10-21 22:42:28,409 INFO L87 Difference]: Start difference. First operand 149 states and 387 transitions. Second operand 44 states. [2020-10-21 22:42:33,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:42:33,476 INFO L93 Difference]: Finished difference Result 242 states and 577 transitions. [2020-10-21 22:42:33,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-10-21 22:42:33,477 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2020-10-21 22:42:33,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:42:33,479 INFO L225 Difference]: With dead ends: 242 [2020-10-21 22:42:33,479 INFO L226 Difference]: Without dead ends: 233 [2020-10-21 22:42:33,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4391 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=4627, Invalid=10379, Unknown=0, NotChecked=0, Total=15006 [2020-10-21 22:42:33,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-21 22:42:33,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 109. [2020-10-21 22:42:33,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-21 22:42:33,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 267 transitions. [2020-10-21 22:42:33,483 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 267 transitions. Word has length 47 [2020-10-21 22:42:33,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:42:33,483 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 267 transitions. [2020-10-21 22:42:33,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-21 22:42:33,483 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 267 transitions. [2020-10-21 22:42:33,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-21 22:42:33,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:42:33,484 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:42:33,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-21 22:42:33,685 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:42:33,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:42:33,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1668834410, now seen corresponding path program 95 times [2020-10-21 22:42:33,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:42:33,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667030574] [2020-10-21 22:42:33,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:42:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:42:34,839 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:42:34,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667030574] [2020-10-21 22:42:34,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473736272] [2020-10-21 22:42:34,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:42:34,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-10-21 22:42:34,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:42:34,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 43 conjunts are in the unsatisfiable core [2020-10-21 22:42:34,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:42:34,986 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:42:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:42:35,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:42:35,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-10-21 22:42:35,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357829756] [2020-10-21 22:42:35,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-21 22:42:35,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:42:35,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-21 22:42:35,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=1442, Unknown=0, NotChecked=0, Total=1892 [2020-10-21 22:42:35,046 INFO L87 Difference]: Start difference. First operand 109 states and 267 transitions. Second operand 44 states. [2020-10-21 22:42:40,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:42:40,119 INFO L93 Difference]: Finished difference Result 200 states and 493 transitions. [2020-10-21 22:42:40,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-21 22:42:40,120 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2020-10-21 22:42:40,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:42:40,121 INFO L225 Difference]: With dead ends: 200 [2020-10-21 22:42:40,121 INFO L226 Difference]: Without dead ends: 195 [2020-10-21 22:42:40,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4082 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=4541, Invalid=9979, Unknown=0, NotChecked=0, Total=14520 [2020-10-21 22:42:40,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-21 22:42:40,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 151. [2020-10-21 22:42:40,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-21 22:42:40,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 393 transitions. [2020-10-21 22:42:40,126 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 393 transitions. Word has length 47 [2020-10-21 22:42:40,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:42:40,126 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 393 transitions. [2020-10-21 22:42:40,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-21 22:42:40,126 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 393 transitions. [2020-10-21 22:42:40,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-21 22:42:40,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:42:40,127 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:42:40,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:42:40,327 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:42:40,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:42:40,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1782137625, now seen corresponding path program 96 times [2020-10-21 22:42:40,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:42:40,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945296317] [2020-10-21 22:42:40,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:42:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-21 22:42:40,344 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-21 22:42:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-21 22:42:40,377 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-21 22:42:40,416 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-21 22:42:40,416 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-21 22:42:40,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2020-10-21 22:42:40,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 10:42:40 BasicIcfg [2020-10-21 22:42:40,554 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-21 22:42:40,556 INFO L168 Benchmark]: Toolchain (without parser) took 226085.44 ms. Allocated memory was 147.3 MB in the beginning and 249.0 MB in the end (delta: 101.7 MB). Free memory was 101.8 MB in the beginning and 106.4 MB in the end (delta: -4.6 MB). Peak memory consumption was 97.1 MB. Max. memory is 7.1 GB. [2020-10-21 22:42:40,556 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 147.3 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-10-21 22:42:40,557 INFO L168 Benchmark]: CACSL2BoogieTranslator took 788.71 ms. Allocated memory was 147.3 MB in the beginning and 205.0 MB in the end (delta: 57.7 MB). Free memory was 101.0 MB in the beginning and 162.7 MB in the end (delta: -61.7 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-10-21 22:42:40,557 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.85 ms. Allocated memory is still 205.0 MB. Free memory was 162.1 MB in the beginning and 160.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-21 22:42:40,557 INFO L168 Benchmark]: Boogie Preprocessor took 29.93 ms. Allocated memory is still 205.0 MB. Free memory was 160.1 MB in the beginning and 158.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-10-21 22:42:40,558 INFO L168 Benchmark]: RCFGBuilder took 423.27 ms. Allocated memory is still 205.0 MB. Free memory was 158.8 MB in the beginning and 136.6 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. [2020-10-21 22:42:40,558 INFO L168 Benchmark]: TraceAbstraction took 224784.52 ms. Allocated memory was 205.0 MB in the beginning and 249.0 MB in the end (delta: 44.0 MB). Free memory was 136.0 MB in the beginning and 106.4 MB in the end (delta: 29.6 MB). Peak memory consumption was 73.6 MB. Max. memory is 7.1 GB. [2020-10-21 22:42:40,560 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 147.3 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 788.71 ms. Allocated memory was 147.3 MB in the beginning and 205.0 MB in the end (delta: 57.7 MB). Free memory was 101.0 MB in the beginning and 162.7 MB in the end (delta: -61.7 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 47.85 ms. Allocated memory is still 205.0 MB. Free memory was 162.1 MB in the beginning and 160.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.93 ms. Allocated memory is still 205.0 MB. Free memory was 160.1 MB in the beginning and 158.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 423.27 ms. Allocated memory is still 205.0 MB. Free memory was 158.8 MB in the beginning and 136.6 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 224784.52 ms. Allocated memory was 205.0 MB in the beginning and 249.0 MB in the end (delta: 44.0 MB). Free memory was 136.0 MB in the beginning and 106.4 MB in the end (delta: 29.6 MB). Peak memory consumption was 73.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 638 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 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 - CounterExampleResult [Line: 685]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L686] 0 int i = 3, j = 6; [L704] 0 pthread_t id1, id2; [L705] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L706] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L708] 0 int condI = i >= (2*20 +6); VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L696] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L688] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=4] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=6, k=5] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=7, k=6] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=8] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=10] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=10, k=11] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=28, k=11, k=11] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=28, k=12, k=11] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=12, k=12] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=12, k=13] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=13, k=13] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=32, k=13, k=14] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=14, k=14] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=14, k=15] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=15, k=15] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=36, k=16, k=15] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=16, k=16] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=38, k=16, k=17] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=17, k=17] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=40, k=18, k=17] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=18, k=18] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=18, k=19] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=19, k=19] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=44, k=19, k=20] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=20, k=20] [L711] 0 int condJ = j >= (2*20 +6); [L713] COND TRUE 0 condI || condJ [L685] COND FALSE 0 !(0) [L685] 0 __assert_fail ("0", "triangular-longest-2.c", 8, __extension__ __PRETTY_FUNCTION__) VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=20, k=20] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 224.5s, OverallIterations: 98, TraceHistogramMax: 20, AutomataDifference: 152.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 1544 SDtfs, 9617 SDslu, 11078 SDs, 0 SdLazy, 13503 SolverSat, 10166 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8252 GetRequests, 2428 SyntacticMatches, 74 SemanticMatches, 5750 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123092 ImplicationChecksByTransitivity, 163.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=151occurred in iteration=97, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 97 MinimizatonAttempts, 4342 StatesRemovedByMinimization, 96 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 3.4s SatisfiabilityAnalysisTime, 42.7s InterpolantComputationTime, 5428 NumberOfCodeBlocks, 5428 NumberOfCodeBlocksAsserted, 669 NumberOfCheckSat, 5191 ConstructedInterpolants, 0 QuantifiedInterpolants, 662283 SizeOfPredicates, 1950 NumberOfNonLiveVariables, 16836 ConjunctsInSsa, 2330 ConjunctsInUnsatCore, 189 InterpolantComputations, 5 PerfectInterpolantSequences, 0/23560 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 incorrect! Received shutdown request...