/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-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-507b705 [2020-09-11 16:16:06,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-11 16:16:06,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-11 16:16:06,267 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-11 16:16:06,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-11 16:16:06,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-11 16:16:06,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-11 16:16:06,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-11 16:16:06,286 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-11 16:16:06,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-11 16:16:06,289 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-11 16:16:06,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-11 16:16:06,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-11 16:16:06,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-11 16:16:06,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-11 16:16:06,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-11 16:16:06,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-11 16:16:06,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-11 16:16:06,304 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-11 16:16:06,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-11 16:16:06,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-11 16:16:06,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-11 16:16:06,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-11 16:16:06,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-11 16:16:06,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-11 16:16:06,329 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-11 16:16:06,329 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-11 16:16:06,334 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-11 16:16:06,334 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-11 16:16:06,338 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-11 16:16:06,339 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-11 16:16:06,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-11 16:16:06,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-11 16:16:06,341 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-11 16:16:06,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-11 16:16:06,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-11 16:16:06,343 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-11 16:16:06,343 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-11 16:16:06,344 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-11 16:16:06,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-11 16:16:06,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-11 16:16:06,346 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-09-11 16:16:06,373 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-11 16:16:06,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-11 16:16:06,374 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-11 16:16:06,374 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-11 16:16:06,375 INFO L138 SettingsManager]: * Use SBE=true [2020-09-11 16:16:06,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-11 16:16:06,375 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-11 16:16:06,375 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-11 16:16:06,375 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-11 16:16:06,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-11 16:16:06,376 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-11 16:16:06,376 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-11 16:16:06,376 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-11 16:16:06,376 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-11 16:16:06,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-11 16:16:06,377 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-11 16:16:06,377 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-11 16:16:06,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-11 16:16:06,377 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-11 16:16:06,378 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-11 16:16:06,378 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-11 16:16:06,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 16:16:06,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-11 16:16:06,379 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-11 16:16:06,379 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-11 16:16:06,379 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-11 16:16:06,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-11 16:16:06,379 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-11 16:16:06,379 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-11 16:16:06,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-11 16:16:06,858 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-11 16:16:06,862 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-11 16:16:06,864 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-11 16:16:06,864 INFO L275 PluginConnector]: CDTParser initialized [2020-09-11 16:16:06,865 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-09-11 16:16:06,947 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fac685128/34ae6cb0279c4feb9afbc198e517b045/FLAGde5a961e4 [2020-09-11 16:16:07,570 INFO L306 CDTParser]: Found 1 translation units. [2020-09-11 16:16:07,571 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-09-11 16:16:07,590 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fac685128/34ae6cb0279c4feb9afbc198e517b045/FLAGde5a961e4 [2020-09-11 16:16:07,866 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fac685128/34ae6cb0279c4feb9afbc198e517b045 [2020-09-11 16:16:07,879 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-11 16:16:07,886 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-11 16:16:07,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-11 16:16:07,888 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-11 16:16:07,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-11 16:16:07,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 04:16:07" (1/1) ... [2020-09-11 16:16:07,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56193757 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:07, skipping insertion in model container [2020-09-11 16:16:07,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 04:16:07" (1/1) ... [2020-09-11 16:16:07,911 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-11 16:16:07,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-11 16:16:08,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 16:16:08,512 INFO L203 MainTranslator]: Completed pre-run [2020-09-11 16:16:08,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 16:16:08,672 INFO L208 MainTranslator]: Completed translation [2020-09-11 16:16:08,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:08 WrapperNode [2020-09-11 16:16:08,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-11 16:16:08,674 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-11 16:16:08,675 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-11 16:16:08,675 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-11 16:16:08,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:08" (1/1) ... [2020-09-11 16:16:08,735 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:08" (1/1) ... [2020-09-11 16:16:08,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-11 16:16:08,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-11 16:16:08,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-11 16:16:08,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-11 16:16:08,774 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:08" (1/1) ... [2020-09-11 16:16:08,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:08" (1/1) ... [2020-09-11 16:16:08,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:08" (1/1) ... [2020-09-11 16:16:08,777 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:08" (1/1) ... [2020-09-11 16:16:08,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:08" (1/1) ... [2020-09-11 16:16:08,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:08" (1/1) ... [2020-09-11 16:16:08,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:08" (1/1) ... [2020-09-11 16:16:08,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-11 16:16:08,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-11 16:16:08,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-11 16:16:08,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-11 16:16:08,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:08,889 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-11 16:16:08,889 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-11 16:16:08,889 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-11 16:16:08,889 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-11 16:16:08,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-11 16:16:08,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-11 16:16:08,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-11 16:16:08,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-11 16:16:08,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-11 16:16:08,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-11 16:16:08,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-11 16:16:08,894 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-11 16:16:09,290 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-11 16:16:09,291 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-11 16:16:09,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 04:16:09 BoogieIcfgContainer [2020-09-11 16:16:09,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-11 16:16:09,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-11 16:16:09,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-11 16:16:09,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-11 16:16:09,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 04:16:07" (1/3) ... [2020-09-11 16:16:09,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ae7fcdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 04:16:09, skipping insertion in model container [2020-09-11 16:16:09,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:08" (2/3) ... [2020-09-11 16:16:09,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ae7fcdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 04:16:09, skipping insertion in model container [2020-09-11 16:16:09,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 04:16:09" (3/3) ... [2020-09-11 16:16:09,306 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2020-09-11 16:16:09,317 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-11 16:16:09,317 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-11 16:16:09,329 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-11 16:16:09,330 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-11 16:16:09,355 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,355 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,356 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,356 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,357 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,357 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,357 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,357 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,358 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,358 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,358 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,359 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,359 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,359 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,359 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,360 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,360 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,360 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,360 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,361 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,361 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,361 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,361 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,362 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,362 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,362 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,362 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,363 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,367 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,368 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,368 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,368 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,368 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,369 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,379 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,379 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,379 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,380 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,380 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,380 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:09,407 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-11 16:16:09,431 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-11 16:16:09,431 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-11 16:16:09,432 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-11 16:16:09,432 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-11 16:16:09,432 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-11 16:16:09,432 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-11 16:16:09,433 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-11 16:16:09,433 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-11 16:16:09,448 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-11 16:16:09,451 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-11 16:16:09,492 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-11 16:16:09,492 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 16:16:09,499 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-11 16:16:09,502 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-11 16:16:09,521 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-11 16:16:09,521 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 16:16:09,526 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-11 16:16:09,529 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-11 16:16:09,530 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-11 16:16:10,548 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-11 16:16:10,781 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-11 16:16:10,781 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-11 16:16:10,786 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-11 16:16:10,800 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-11 16:16:10,804 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-11 16:16:10,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-11 16:16:10,814 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:10,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-11 16:16:10,816 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:10,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:10,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-11 16:16:10,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:10,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132516372] [2020-09-11 16:16:10,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:11,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:11,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132516372] [2020-09-11 16:16:11,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:16:11,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-11 16:16:11,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879502732] [2020-09-11 16:16:11,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-11 16:16:11,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:11,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-11 16:16:11,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-11 16:16:11,136 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-11 16:16:11,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:11,220 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-11 16:16:11,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 16:16:11,223 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-11 16:16:11,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:11,239 INFO L225 Difference]: With dead ends: 75 [2020-09-11 16:16:11,239 INFO L226 Difference]: Without dead ends: 42 [2020-09-11 16:16:11,241 INFO L675 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 [2020-09-11 16:16:11,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-11 16:16:11,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-11 16:16:11,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 16:16:11,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-11 16:16:11,291 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-11 16:16:11,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:11,292 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-11 16:16:11,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-11 16:16:11,292 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-11 16:16:11,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 16:16:11,293 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:11,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:11,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-11 16:16:11,294 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:11,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:11,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-11 16:16:11,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:11,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293269889] [2020-09-11 16:16:11,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:11,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:11,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:11,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293269889] [2020-09-11 16:16:11,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:16:11,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 16:16:11,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010839767] [2020-09-11 16:16:11,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 16:16:11,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:11,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 16:16:11,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 16:16:11,426 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-11 16:16:11,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:11,465 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-11 16:16:11,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-11 16:16:11,466 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-11 16:16:11,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:11,467 INFO L225 Difference]: With dead ends: 56 [2020-09-11 16:16:11,467 INFO L226 Difference]: Without dead ends: 50 [2020-09-11 16:16:11,468 INFO L675 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 [2020-09-11 16:16:11,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-11 16:16:11,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-11 16:16:11,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 16:16:11,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-11 16:16:11,476 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-11 16:16:11,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:11,478 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-11 16:16:11,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 16:16:11,478 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-11 16:16:11,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:16:11,479 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:11,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:11,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-11 16:16:11,480 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:11,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:11,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-11 16:16:11,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:11,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388379496] [2020-09-11 16:16:11,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:11,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:11,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388379496] [2020-09-11 16:16:11,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:16:11,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 16:16:11,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581953599] [2020-09-11 16:16:11,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 16:16:11,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:11,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 16:16:11,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-11 16:16:11,610 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-09-11 16:16:11,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:11,715 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-11 16:16:11,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 16:16:11,715 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 16:16:11,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:11,717 INFO L225 Difference]: With dead ends: 78 [2020-09-11 16:16:11,717 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 16:16:11,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:11,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 16:16:11,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-09-11 16:16:11,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 16:16:11,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-11 16:16:11,727 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-09-11 16:16:11,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:11,728 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-11 16:16:11,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 16:16:11,728 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-11 16:16:11,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:16:11,729 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:11,729 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:11,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-11 16:16:11,730 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:11,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:11,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-09-11 16:16:11,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:11,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938640294] [2020-09-11 16:16:11,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:11,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:11,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938640294] [2020-09-11 16:16:11,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:16:11,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 16:16:11,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67694295] [2020-09-11 16:16:11,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 16:16:11,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:11,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 16:16:11,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-11 16:16:11,818 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-09-11 16:16:11,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:11,904 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-11 16:16:11,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 16:16:11,908 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 16:16:11,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:11,909 INFO L225 Difference]: With dead ends: 54 [2020-09-11 16:16:11,909 INFO L226 Difference]: Without dead ends: 43 [2020-09-11 16:16:11,910 INFO L675 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 [2020-09-11 16:16:11,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-11 16:16:11,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-11 16:16:11,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-11 16:16:11,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-09-11 16:16:11,916 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-09-11 16:16:11,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:11,916 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-09-11 16:16:11,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 16:16:11,916 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-09-11 16:16:11,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:16:11,917 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:11,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:11,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-11 16:16:11,918 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:11,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:11,918 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-09-11 16:16:11,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:11,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397996406] [2020-09-11 16:16:11,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:11,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:11,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397996406] [2020-09-11 16:16:11,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:16:11,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 16:16:11,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375089423] [2020-09-11 16:16:11,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 16:16:11,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:11,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 16:16:11,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-11 16:16:11,993 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-09-11 16:16:12,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:12,081 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-09-11 16:16:12,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 16:16:12,082 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 16:16:12,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:12,083 INFO L225 Difference]: With dead ends: 57 [2020-09-11 16:16:12,084 INFO L226 Difference]: Without dead ends: 51 [2020-09-11 16:16:12,084 INFO L675 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 [2020-09-11 16:16:12,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-11 16:16:12,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-09-11 16:16:12,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-11 16:16:12,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-11 16:16:12,090 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-09-11 16:16:12,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:12,091 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-11 16:16:12,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 16:16:12,091 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-11 16:16:12,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:16:12,092 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:12,092 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:12,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-11 16:16:12,092 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:12,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:12,093 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-09-11 16:16:12,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:12,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312982685] [2020-09-11 16:16:12,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:12,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:12,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:12,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312982685] [2020-09-11 16:16:12,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437824069] [2020-09-11 16:16:12,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:12,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:12,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:12,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:16:12,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:12,312 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:12,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:12,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-11 16:16:12,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232071111] [2020-09-11 16:16:12,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 16:16:12,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:12,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 16:16:12,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-11 16:16:12,329 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-09-11 16:16:12,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:12,460 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-09-11 16:16:12,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 16:16:12,461 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 16:16:12,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:12,462 INFO L225 Difference]: With dead ends: 48 [2020-09-11 16:16:12,462 INFO L226 Difference]: Without dead ends: 43 [2020-09-11 16:16:12,462 INFO L675 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 [2020-09-11 16:16:12,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-11 16:16:12,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-11 16:16:12,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-11 16:16:12,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-11 16:16:12,471 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-09-11 16:16:12,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:12,471 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-11 16:16:12,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 16:16:12,472 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-11 16:16:12,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:16:12,473 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:12,473 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:12,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-11 16:16:12,676 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:12,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:12,677 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-09-11 16:16:12,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:12,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422458650] [2020-09-11 16:16:12,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:12,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:12,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422458650] [2020-09-11 16:16:12,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286874299] [2020-09-11 16:16:12,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:12,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:12,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:12,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:16:12,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:12,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:12,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-11 16:16:12,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291381915] [2020-09-11 16:16:12,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-11 16:16:12,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:12,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-11 16:16:12,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-11 16:16:12,860 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-09-11 16:16:12,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:12,936 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-11 16:16:12,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 16:16:12,937 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-11 16:16:12,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:12,938 INFO L225 Difference]: With dead ends: 54 [2020-09-11 16:16:12,938 INFO L226 Difference]: Without dead ends: 48 [2020-09-11 16:16:12,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:12,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-11 16:16:12,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-09-11 16:16:12,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 16:16:12,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-11 16:16:12,944 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-09-11 16:16:12,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:12,944 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-11 16:16:12,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-11 16:16:12,945 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-11 16:16:12,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:16:12,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:12,945 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:13,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:13,160 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:13,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:13,160 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-09-11 16:16:13,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:13,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2584136] [2020-09-11 16:16:13,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:13,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:13,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2584136] [2020-09-11 16:16:13,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976638829] [2020-09-11 16:16:13,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:13,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:16:13,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:13,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:16:13,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:13,332 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:13,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:13,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-11 16:16:13,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553974324] [2020-09-11 16:16:13,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 16:16:13,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:13,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 16:16:13,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-11 16:16:13,354 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-09-11 16:16:13,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:13,475 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-09-11 16:16:13,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 16:16:13,476 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 16:16:13,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:13,476 INFO L225 Difference]: With dead ends: 58 [2020-09-11 16:16:13,477 INFO L226 Difference]: Without dead ends: 52 [2020-09-11 16:16:13,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:13,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-11 16:16:13,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-11 16:16:13,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-11 16:16:13,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-11 16:16:13,486 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-09-11 16:16:13,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:13,490 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-11 16:16:13,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 16:16:13,490 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-11 16:16:13,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:16:13,491 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:13,491 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:13,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:13,705 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:13,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:13,706 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-09-11 16:16:13,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:13,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987976415] [2020-09-11 16:16:13,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:13,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:13,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987976415] [2020-09-11 16:16:13,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031009300] [2020-09-11 16:16:13,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:13,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:16:13,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:13,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:13,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-11 16:16:13,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894677280] [2020-09-11 16:16:13,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-11 16:16:13,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:13,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-11 16:16:13,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-11 16:16:13,926 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-09-11 16:16:14,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:14,065 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-11 16:16:14,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:16:14,066 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-11 16:16:14,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:14,067 INFO L225 Difference]: With dead ends: 78 [2020-09-11 16:16:14,067 INFO L226 Difference]: Without dead ends: 72 [2020-09-11 16:16:14,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:14,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-11 16:16:14,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-09-11 16:16:14,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 16:16:14,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-09-11 16:16:14,095 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-09-11 16:16:14,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:14,095 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-09-11 16:16:14,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-11 16:16:14,095 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-09-11 16:16:14,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:16:14,096 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:14,096 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:14,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:14,297 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:14,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:14,298 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-09-11 16:16:14,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:14,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482682182] [2020-09-11 16:16:14,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:14,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:14,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482682182] [2020-09-11 16:16:14,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118111116] [2020-09-11 16:16:14,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:14,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:14,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:14,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:16:14,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:14,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:14,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-11 16:16:14,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375717837] [2020-09-11 16:16:14,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 16:16:14,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:14,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 16:16:14,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-11 16:16:14,479 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-09-11 16:16:14,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:14,684 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-09-11 16:16:14,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:16:14,684 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 16:16:14,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:14,685 INFO L225 Difference]: With dead ends: 62 [2020-09-11 16:16:14,685 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 16:16:14,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:14,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 16:16:14,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-09-11 16:16:14,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-11 16:16:14,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-09-11 16:16:14,697 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-09-11 16:16:14,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:14,698 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-09-11 16:16:14,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 16:16:14,698 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-09-11 16:16:14,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:16:14,699 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:14,699 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:14,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-11 16:16:14,913 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:14,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:14,914 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-09-11 16:16:14,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:14,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494920414] [2020-09-11 16:16:14,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:15,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:15,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494920414] [2020-09-11 16:16:15,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307896169] [2020-09-11 16:16:15,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:15,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:16:15,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:15,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:16:15,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:15,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:15,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-11 16:16:15,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616164029] [2020-09-11 16:16:15,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 16:16:15,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:15,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 16:16:15,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-11 16:16:15,104 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-09-11 16:16:15,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:15,238 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-09-11 16:16:15,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:16:15,239 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-11 16:16:15,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:15,240 INFO L225 Difference]: With dead ends: 64 [2020-09-11 16:16:15,240 INFO L226 Difference]: Without dead ends: 58 [2020-09-11 16:16:15,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:15,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-11 16:16:15,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-11 16:16:15,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-11 16:16:15,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-09-11 16:16:15,245 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-09-11 16:16:15,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:15,245 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-09-11 16:16:15,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 16:16:15,245 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-09-11 16:16:15,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:16:15,246 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:15,246 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:15,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:15,457 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:15,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:15,457 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-09-11 16:16:15,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:15,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255181042] [2020-09-11 16:16:15,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:15,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255181042] [2020-09-11 16:16:15,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552157776] [2020-09-11 16:16:15,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:15,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:15,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:15,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:16:15,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:15,613 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:15,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:15,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 16:16:15,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131987824] [2020-09-11 16:16:15,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:16:15,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:15,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:16:15,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:15,630 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-09-11 16:16:15,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:15,789 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-09-11 16:16:15,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:16:15,790 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 16:16:15,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:15,791 INFO L225 Difference]: With dead ends: 61 [2020-09-11 16:16:15,791 INFO L226 Difference]: Without dead ends: 55 [2020-09-11 16:16:15,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:16:15,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-11 16:16:15,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-09-11 16:16:15,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-11 16:16:15,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-11 16:16:15,796 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-09-11 16:16:15,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:15,797 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-11 16:16:15,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:16:15,797 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-11 16:16:15,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:16:15,798 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:15,798 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:16,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:16,010 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:16,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:16,011 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-09-11 16:16:16,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:16,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461835120] [2020-09-11 16:16:16,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:16,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:16,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461835120] [2020-09-11 16:16:16,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259130377] [2020-09-11 16:16:16,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:16,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:16,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:16,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:16:16,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:16,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:16,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:16,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-11 16:16:16,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499021346] [2020-09-11 16:16:16,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 16:16:16,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:16,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 16:16:16,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-11 16:16:16,169 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-09-11 16:16:16,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:16,342 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-11 16:16:16,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:16:16,342 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-11 16:16:16,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:16,343 INFO L225 Difference]: With dead ends: 77 [2020-09-11 16:16:16,344 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 16:16:16,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:16,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 16:16:16,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-09-11 16:16:16,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-11 16:16:16,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-09-11 16:16:16,349 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-09-11 16:16:16,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:16,350 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-09-11 16:16:16,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 16:16:16,350 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-09-11 16:16:16,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:16:16,351 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:16,351 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:16,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-11 16:16:16,556 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:16,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:16,557 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-09-11 16:16:16,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:16,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038770144] [2020-09-11 16:16:16,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:16,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:16,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038770144] [2020-09-11 16:16:16,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002481814] [2020-09-11 16:16:16,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:16,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:16:16,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:16,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:16:16,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:16,703 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:16,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:16,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:16,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 16:16:16,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900871737] [2020-09-11 16:16:16,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:16:16,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:16,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:16:16,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:16,721 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-09-11 16:16:16,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:16,975 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-09-11 16:16:16,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:16:16,976 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 16:16:16,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:16,977 INFO L225 Difference]: With dead ends: 58 [2020-09-11 16:16:16,977 INFO L226 Difference]: Without dead ends: 50 [2020-09-11 16:16:16,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:16:16,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-11 16:16:16,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-09-11 16:16:16,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-11 16:16:16,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-09-11 16:16:16,984 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-09-11 16:16:16,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:16,984 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-09-11 16:16:16,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:16:16,984 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-09-11 16:16:16,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:16:16,986 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:16,986 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:17,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:17,187 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:17,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:17,188 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-09-11 16:16:17,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:17,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025603028] [2020-09-11 16:16:17,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:17,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025603028] [2020-09-11 16:16:17,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927993573] [2020-09-11 16:16:17,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:17,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:17,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:16:17,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:17,375 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:17,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:17,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 16:16:17,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060793060] [2020-09-11 16:16:17,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:16:17,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:17,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:16:17,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:17,389 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-09-11 16:16:17,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:17,594 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-09-11 16:16:17,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:16:17,594 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 16:16:17,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:17,595 INFO L225 Difference]: With dead ends: 60 [2020-09-11 16:16:17,595 INFO L226 Difference]: Without dead ends: 55 [2020-09-11 16:16:17,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:16:17,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-11 16:16:17,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-09-11 16:16:17,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 16:16:17,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-11 16:16:17,601 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-09-11 16:16:17,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:17,602 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-11 16:16:17,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:16:17,602 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-11 16:16:17,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:17,604 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:17,604 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:17,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-11 16:16:17,815 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:17,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:17,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-09-11 16:16:17,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:17,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053389992] [2020-09-11 16:16:17,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:17,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053389992] [2020-09-11 16:16:17,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316975384] [2020-09-11 16:16:17,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:17,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:17,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:17,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:17,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:18,012 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:18,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:18,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 16:16:18,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602719237] [2020-09-11 16:16:18,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:18,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:18,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:18,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:18,029 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-09-11 16:16:18,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:18,275 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-09-11 16:16:18,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:16:18,278 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 16:16:18,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:18,279 INFO L225 Difference]: With dead ends: 54 [2020-09-11 16:16:18,279 INFO L226 Difference]: Without dead ends: 49 [2020-09-11 16:16:18,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:16:18,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-11 16:16:18,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-09-11 16:16:18,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-11 16:16:18,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-11 16:16:18,283 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-09-11 16:16:18,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:18,284 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-11 16:16:18,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:18,284 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-11 16:16:18,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:18,284 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:18,285 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:18,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-11 16:16:18,494 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:18,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:18,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-09-11 16:16:18,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:18,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13741753] [2020-09-11 16:16:18,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:18,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:18,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13741753] [2020-09-11 16:16:18,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502088337] [2020-09-11 16:16:18,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:18,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:16:18,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:18,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:18,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:18,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:18,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 16:16:18,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081498648] [2020-09-11 16:16:18,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:16:18,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:18,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:16:18,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:18,669 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-09-11 16:16:18,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:18,770 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-09-11 16:16:18,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:16:18,771 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-11 16:16:18,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:18,772 INFO L225 Difference]: With dead ends: 60 [2020-09-11 16:16:18,772 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 16:16:18,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:18,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 16:16:18,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-11 16:16:18,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 16:16:18,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-11 16:16:18,776 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-09-11 16:16:18,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:18,777 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-11 16:16:18,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:16:18,777 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-11 16:16:18,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:18,778 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:18,778 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:18,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-11 16:16:18,985 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:18,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:18,986 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-09-11 16:16:18,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:18,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539411364] [2020-09-11 16:16:18,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:18,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:19,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539411364] [2020-09-11 16:16:19,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743970994] [2020-09-11 16:16:19,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:19,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:19,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:19,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:19,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:19,166 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:19,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:19,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:19,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 16:16:19,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81650653] [2020-09-11 16:16:19,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:19,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:19,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:19,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:19,181 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-09-11 16:16:19,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:19,320 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-09-11 16:16:19,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:16:19,320 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 16:16:19,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:19,321 INFO L225 Difference]: With dead ends: 66 [2020-09-11 16:16:19,321 INFO L226 Difference]: Without dead ends: 60 [2020-09-11 16:16:19,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:16:19,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-11 16:16:19,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-09-11 16:16:19,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-11 16:16:19,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-11 16:16:19,325 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-09-11 16:16:19,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:19,325 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-11 16:16:19,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:19,325 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-11 16:16:19,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:19,326 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:19,326 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:19,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-11 16:16:19,534 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:19,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:19,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-09-11 16:16:19,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:19,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335347736] [2020-09-11 16:16:19,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:19,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335347736] [2020-09-11 16:16:19,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643648677] [2020-09-11 16:16:19,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:19,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:16:19,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:19,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:19,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:19,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:19,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 16:16:19,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071356451] [2020-09-11 16:16:19,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:16:19,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:19,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:16:19,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:19,754 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-09-11 16:16:19,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:19,945 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-09-11 16:16:19,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:16:19,946 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-11 16:16:19,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:19,947 INFO L225 Difference]: With dead ends: 67 [2020-09-11 16:16:19,947 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 16:16:19,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:16:19,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 16:16:19,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-09-11 16:16:19,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-11 16:16:19,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-09-11 16:16:19,953 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-09-11 16:16:19,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:19,954 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-09-11 16:16:19,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:16:19,954 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-09-11 16:16:19,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:19,956 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:19,956 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:20,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:20,167 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:20,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:20,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-09-11 16:16:20,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:20,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365119063] [2020-09-11 16:16:20,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:20,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365119063] [2020-09-11 16:16:20,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291113140] [2020-09-11 16:16:20,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:20,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:16:20,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:20,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:20,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:20,345 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:20,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:20,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 16:16:20,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748775606] [2020-09-11 16:16:20,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:20,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:20,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:20,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:20,364 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-09-11 16:16:20,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:20,585 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-09-11 16:16:20,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:16:20,586 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 16:16:20,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:20,586 INFO L225 Difference]: With dead ends: 69 [2020-09-11 16:16:20,587 INFO L226 Difference]: Without dead ends: 63 [2020-09-11 16:16:20,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:16:20,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-11 16:16:20,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-11 16:16:20,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 16:16:20,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-11 16:16:20,590 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-09-11 16:16:20,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:20,590 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-11 16:16:20,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:20,590 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-11 16:16:20,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:20,591 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:20,591 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:20,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:20,800 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:20,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:20,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-09-11 16:16:20,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:20,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849394945] [2020-09-11 16:16:20,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:20,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849394945] [2020-09-11 16:16:20,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803992221] [2020-09-11 16:16:20,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:20,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:20,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:20,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:20,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 16:16:20,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944552482] [2020-09-11 16:16:20,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:16:20,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:20,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:16:20,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:20,934 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-09-11 16:16:21,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:21,183 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-11 16:16:21,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:21,186 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-11 16:16:21,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:21,187 INFO L225 Difference]: With dead ends: 88 [2020-09-11 16:16:21,187 INFO L226 Difference]: Without dead ends: 82 [2020-09-11 16:16:21,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:16:21,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-11 16:16:21,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-09-11 16:16:21,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 16:16:21,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-09-11 16:16:21,190 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-09-11 16:16:21,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:21,191 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-09-11 16:16:21,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:16:21,191 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-09-11 16:16:21,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:21,192 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:21,192 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:21,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:21,401 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:21,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:21,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-09-11 16:16:21,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:21,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176216958] [2020-09-11 16:16:21,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:21,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176216958] [2020-09-11 16:16:21,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626628090] [2020-09-11 16:16:21,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:21,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:21,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:21,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:16:21,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:21,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:21,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:21,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 16:16:21,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375055867] [2020-09-11 16:16:21,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:21,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:21,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:21,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:21,596 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-09-11 16:16:21,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:21,878 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-11 16:16:21,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:16:21,878 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 16:16:21,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:21,879 INFO L225 Difference]: With dead ends: 69 [2020-09-11 16:16:21,879 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 16:16:21,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:16:21,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 16:16:21,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-09-11 16:16:21,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-11 16:16:21,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-09-11 16:16:21,883 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-09-11 16:16:21,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:21,883 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-09-11 16:16:21,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:21,883 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-09-11 16:16:21,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:21,885 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:21,885 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:22,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-11 16:16:22,086 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:22,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:22,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-09-11 16:16:22,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:22,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110883840] [2020-09-11 16:16:22,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:22,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110883840] [2020-09-11 16:16:22,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733062292] [2020-09-11 16:16:22,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:22,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:16:22,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:22,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:16:22,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:22,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:22,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 16:16:22,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482020491] [2020-09-11 16:16:22,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:22,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:22,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:22,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:22,279 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-09-11 16:16:22,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:22,459 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-11 16:16:22,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:16:22,459 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-11 16:16:22,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:22,460 INFO L225 Difference]: With dead ends: 74 [2020-09-11 16:16:22,460 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 16:16:22,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:16:22,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 16:16:22,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-09-11 16:16:22,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-11 16:16:22,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-11 16:16:22,464 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-11 16:16:22,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:22,466 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-11 16:16:22,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:22,466 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-11 16:16:22,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:22,466 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:22,467 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:22,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-11 16:16:22,675 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:22,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:22,676 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-09-11 16:16:22,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:22,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59351271] [2020-09-11 16:16:22,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:22,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:22,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:22,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59351271] [2020-09-11 16:16:22,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784313318] [2020-09-11 16:16:22,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:22,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:22,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:22,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:16:22,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:22,883 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:22,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:22,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 16:16:22,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698502806] [2020-09-11 16:16:22,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:22,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:22,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:22,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:22,902 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-11 16:16:23,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:23,105 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-09-11 16:16:23,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:16:23,106 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 16:16:23,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:23,107 INFO L225 Difference]: With dead ends: 71 [2020-09-11 16:16:23,107 INFO L226 Difference]: Without dead ends: 65 [2020-09-11 16:16:23,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:16:23,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-11 16:16:23,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-09-11 16:16:23,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 16:16:23,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-11 16:16:23,110 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-11 16:16:23,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:23,111 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-11 16:16:23,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:23,111 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-11 16:16:23,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:23,111 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:23,112 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:23,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-11 16:16:23,321 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:23,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:23,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-09-11 16:16:23,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:23,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105159956] [2020-09-11 16:16:23,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:23,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:23,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105159956] [2020-09-11 16:16:23,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102431276] [2020-09-11 16:16:23,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:23,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:16:23,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:23,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:16:23,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:23,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:23,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 16:16:23,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025633543] [2020-09-11 16:16:23,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:23,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:23,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:23,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:23,520 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-11 16:16:23,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:23,754 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-09-11 16:16:23,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:16:23,760 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-11 16:16:23,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:23,761 INFO L225 Difference]: With dead ends: 68 [2020-09-11 16:16:23,761 INFO L226 Difference]: Without dead ends: 62 [2020-09-11 16:16:23,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:16:23,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-11 16:16:23,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-09-11 16:16:23,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-11 16:16:23,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-11 16:16:23,764 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-11 16:16:23,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:23,764 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-11 16:16:23,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:23,764 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-11 16:16:23,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:23,765 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:23,765 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:23,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-11 16:16:23,973 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:23,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:23,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-09-11 16:16:23,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:23,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950768551] [2020-09-11 16:16:23,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:24,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950768551] [2020-09-11 16:16:24,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139052012] [2020-09-11 16:16:24,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:24,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:16:24,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:24,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:16:24,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:24,132 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:24,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:24,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 16:16:24,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389149057] [2020-09-11 16:16:24,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:24,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:24,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:24,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:24,144 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-11 16:16:24,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:24,457 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-09-11 16:16:24,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:16:24,457 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 16:16:24,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:24,458 INFO L225 Difference]: With dead ends: 67 [2020-09-11 16:16:24,458 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 16:16:24,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:16:24,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 16:16:24,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-09-11 16:16:24,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 16:16:24,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-11 16:16:24,463 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-11 16:16:24,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:24,463 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-11 16:16:24,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:24,464 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-11 16:16:24,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:24,464 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:24,464 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:24,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-11 16:16:24,671 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:24,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:24,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-09-11 16:16:24,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:24,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545510307] [2020-09-11 16:16:24,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:24,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:24,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545510307] [2020-09-11 16:16:24,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453228743] [2020-09-11 16:16:24,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:24,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:16:24,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:24,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:24,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:24,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 16:16:24,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98089438] [2020-09-11 16:16:24,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:24,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:24,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:24,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:24,850 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-11 16:16:25,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:25,116 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-11 16:16:25,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:25,116 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-11 16:16:25,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:25,118 INFO L225 Difference]: With dead ends: 83 [2020-09-11 16:16:25,118 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 16:16:25,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:16:25,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 16:16:25,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-09-11 16:16:25,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 16:16:25,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-09-11 16:16:25,122 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-09-11 16:16:25,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:25,122 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-09-11 16:16:25,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:25,122 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-09-11 16:16:25,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:25,123 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:25,123 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:25,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:25,333 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:25,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:25,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-09-11 16:16:25,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:25,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988519141] [2020-09-11 16:16:25,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:25,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988519141] [2020-09-11 16:16:25,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369680596] [2020-09-11 16:16:25,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:25,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:25,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:25,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:16:25,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:25,486 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:25,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:25,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 16:16:25,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39275202] [2020-09-11 16:16:25,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:25,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:25,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:25,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:25,503 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-09-11 16:16:25,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:25,861 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-09-11 16:16:25,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:16:25,863 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 16:16:25,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:25,864 INFO L225 Difference]: With dead ends: 64 [2020-09-11 16:16:25,864 INFO L226 Difference]: Without dead ends: 56 [2020-09-11 16:16:25,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:16:25,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-11 16:16:25,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2020-09-11 16:16:25,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-11 16:16:25,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-09-11 16:16:25,867 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-09-11 16:16:25,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:25,867 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-09-11 16:16:25,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:25,867 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-09-11 16:16:25,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:25,868 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:25,868 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:26,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-11 16:16:26,074 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:26,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:26,074 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-09-11 16:16:26,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:26,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424482154] [2020-09-11 16:16:26,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:26,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:26,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424482154] [2020-09-11 16:16:26,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270883278] [2020-09-11 16:16:26,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:26,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:16:26,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:26,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:16:26,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:26,240 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:26,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:26,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 16:16:26,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380490167] [2020-09-11 16:16:26,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:26,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:26,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:26,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:26,253 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-09-11 16:16:26,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:26,593 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-09-11 16:16:26,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:26,594 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 16:16:26,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:26,594 INFO L225 Difference]: With dead ends: 68 [2020-09-11 16:16:26,594 INFO L226 Difference]: Without dead ends: 63 [2020-09-11 16:16:26,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:16:26,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-11 16:16:26,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-09-11 16:16:26,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 16:16:26,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-11 16:16:26,599 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-09-11 16:16:26,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:26,599 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-11 16:16:26,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:26,600 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-11 16:16:26,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:26,600 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:26,600 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:26,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-11 16:16:26,809 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:26,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:26,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-09-11 16:16:26,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:26,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47263874] [2020-09-11 16:16:26,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:26,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47263874] [2020-09-11 16:16:26,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41463129] [2020-09-11 16:16:26,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:26,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:26,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:26,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:26,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:26,980 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:27,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:27,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:27,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 16:16:27,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742531699] [2020-09-11 16:16:27,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:27,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:27,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:27,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:27,005 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-09-11 16:16:27,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:27,362 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-09-11 16:16:27,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:27,363 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 16:16:27,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:27,364 INFO L225 Difference]: With dead ends: 60 [2020-09-11 16:16:27,364 INFO L226 Difference]: Without dead ends: 55 [2020-09-11 16:16:27,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:16:27,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-11 16:16:27,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-11 16:16:27,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 16:16:27,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-11 16:16:27,367 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-09-11 16:16:27,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:27,368 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-11 16:16:27,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:27,368 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-11 16:16:27,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:27,368 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:27,368 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:27,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:27,576 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:27,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:27,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-09-11 16:16:27,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:27,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687454233] [2020-09-11 16:16:27,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:27,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:27,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687454233] [2020-09-11 16:16:27,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342202470] [2020-09-11 16:16:27,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:27,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 16:16:27,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:27,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:27,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:27,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:27,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 16:16:27,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715070827] [2020-09-11 16:16:27,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:27,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:27,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:27,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:27,772 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-09-11 16:16:27,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:27,936 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-09-11 16:16:27,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:16:27,937 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 16:16:27,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:27,938 INFO L225 Difference]: With dead ends: 66 [2020-09-11 16:16:27,938 INFO L226 Difference]: Without dead ends: 60 [2020-09-11 16:16:27,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:16:27,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-11 16:16:27,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-11 16:16:27,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 16:16:27,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-11 16:16:27,942 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-09-11 16:16:27,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:27,943 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-11 16:16:27,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:27,944 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-11 16:16:27,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:27,944 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:27,944 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:28,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:28,153 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:28,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:28,154 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-09-11 16:16:28,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:28,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230490482] [2020-09-11 16:16:28,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:28,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230490482] [2020-09-11 16:16:28,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591266421] [2020-09-11 16:16:28,317 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:28,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 16:16:28,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:28,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:28,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:28,431 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:28,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:28,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 16:16:28,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13524506] [2020-09-11 16:16:28,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:28,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:28,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:28,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:28,461 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-09-11 16:16:28,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:28,713 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-09-11 16:16:28,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:16:28,714 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 16:16:28,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:28,715 INFO L225 Difference]: With dead ends: 74 [2020-09-11 16:16:28,717 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 16:16:28,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:16:28,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 16:16:28,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-11 16:16:28,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-11 16:16:28,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-09-11 16:16:28,722 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-09-11 16:16:28,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:28,722 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-09-11 16:16:28,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:28,723 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-09-11 16:16:28,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:28,723 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:28,724 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:28,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-11 16:16:28,935 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:28,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:28,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-09-11 16:16:28,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:28,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647622271] [2020-09-11 16:16:28,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:29,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:29,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647622271] [2020-09-11 16:16:29,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764940141] [2020-09-11 16:16:29,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:29,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:29,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:29,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:29,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:29,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:29,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 16:16:29,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958932148] [2020-09-11 16:16:29,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:29,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:29,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:29,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:29,131 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-09-11 16:16:29,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:29,410 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-09-11 16:16:29,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:29,411 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 16:16:29,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:29,412 INFO L225 Difference]: With dead ends: 75 [2020-09-11 16:16:29,412 INFO L226 Difference]: Without dead ends: 69 [2020-09-11 16:16:29,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:16:29,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-11 16:16:29,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-09-11 16:16:29,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-11 16:16:29,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-11 16:16:29,420 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-09-11 16:16:29,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:29,421 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-11 16:16:29,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:29,421 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-11 16:16:29,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:29,422 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:29,422 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:29,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:29,634 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:29,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:29,635 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-09-11 16:16:29,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:29,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681146987] [2020-09-11 16:16:29,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:29,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:29,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:29,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681146987] [2020-09-11 16:16:29,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115373801] [2020-09-11 16:16:29,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:29,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:29,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:29,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:29,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:29,877 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:29,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:29,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 16:16:29,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031303738] [2020-09-11 16:16:29,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:29,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:29,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:29,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:29,902 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-09-11 16:16:30,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:30,216 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-09-11 16:16:30,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:16:30,217 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 16:16:30,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:30,218 INFO L225 Difference]: With dead ends: 79 [2020-09-11 16:16:30,218 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 16:16:30,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:16:30,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 16:16:30,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-09-11 16:16:30,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 16:16:30,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-11 16:16:30,221 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-09-11 16:16:30,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:30,221 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-11 16:16:30,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:30,222 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-11 16:16:30,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:30,222 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:30,222 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:30,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-11 16:16:30,434 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:30,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:30,434 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-09-11 16:16:30,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:30,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914896331] [2020-09-11 16:16:30,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:30,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:30,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914896331] [2020-09-11 16:16:30,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946861406] [2020-09-11 16:16:30,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:30,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 16:16:30,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:30,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:30,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:30,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:30,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 16:16:30,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264165622] [2020-09-11 16:16:30,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:30,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:30,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:30,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:30,647 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-09-11 16:16:30,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:30,902 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-09-11 16:16:30,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:16:30,903 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 16:16:30,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:30,904 INFO L225 Difference]: With dead ends: 79 [2020-09-11 16:16:30,905 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 16:16:30,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:16:30,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 16:16:30,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-09-11 16:16:30,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-11 16:16:30,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-09-11 16:16:30,908 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-09-11 16:16:30,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:30,908 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-09-11 16:16:30,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:30,908 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-09-11 16:16:30,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:30,909 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:30,909 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:31,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:31,118 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:31,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:31,119 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-09-11 16:16:31,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:31,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255007734] [2020-09-11 16:16:31,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:31,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255007734] [2020-09-11 16:16:31,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847663445] [2020-09-11 16:16:31,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:31,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:31,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:31,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:31,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:31,299 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:31,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:31,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 16:16:31,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515457373] [2020-09-11 16:16:31,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:31,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:31,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:31,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:31,314 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-09-11 16:16:31,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:31,655 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-09-11 16:16:31,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:16:31,657 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 16:16:31,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:31,657 INFO L225 Difference]: With dead ends: 76 [2020-09-11 16:16:31,657 INFO L226 Difference]: Without dead ends: 70 [2020-09-11 16:16:31,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:16:31,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-11 16:16:31,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-09-11 16:16:31,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 16:16:31,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-11 16:16:31,660 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-09-11 16:16:31,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:31,660 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-11 16:16:31,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:31,660 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-11 16:16:31,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:31,661 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:31,661 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:31,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-11 16:16:31,862 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:31,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:31,862 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-09-11 16:16:31,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:31,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949743555] [2020-09-11 16:16:31,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:31,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:31,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949743555] [2020-09-11 16:16:31,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979644798] [2020-09-11 16:16:31,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:31,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 16:16:31,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:32,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:32,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:32,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:32,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:32,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 16:16:32,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211925942] [2020-09-11 16:16:32,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:32,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:32,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:32,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:32,020 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-09-11 16:16:32,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:32,348 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-09-11 16:16:32,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:16:32,348 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 16:16:32,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:32,350 INFO L225 Difference]: With dead ends: 96 [2020-09-11 16:16:32,350 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 16:16:32,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-11 16:16:32,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 16:16:32,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-09-11 16:16:32,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 16:16:32,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-09-11 16:16:32,355 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-09-11 16:16:32,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:32,355 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-09-11 16:16:32,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:32,356 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-09-11 16:16:32,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:32,356 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:32,357 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:32,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-11 16:16:32,568 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:32,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:32,570 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-09-11 16:16:32,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:32,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904940038] [2020-09-11 16:16:32,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:32,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:32,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904940038] [2020-09-11 16:16:32,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110783754] [2020-09-11 16:16:32,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:32,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 16:16:32,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:32,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:32,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:32,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:32,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:32,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 16:16:32,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990200788] [2020-09-11 16:16:32,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:32,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:32,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:32,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:32,801 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-09-11 16:16:33,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:33,222 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-09-11 16:16:33,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:16:33,223 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 16:16:33,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:33,224 INFO L225 Difference]: With dead ends: 77 [2020-09-11 16:16:33,224 INFO L226 Difference]: Without dead ends: 69 [2020-09-11 16:16:33,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-09-11 16:16:33,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-11 16:16:33,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-11 16:16:33,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-11 16:16:33,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-09-11 16:16:33,227 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-09-11 16:16:33,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:33,228 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-09-11 16:16:33,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:33,228 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-09-11 16:16:33,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:33,228 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:33,228 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:33,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-11 16:16:33,437 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:33,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:33,437 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-09-11 16:16:33,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:33,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535278126] [2020-09-11 16:16:33,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:33,584 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:33,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535278126] [2020-09-11 16:16:33,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128002556] [2020-09-11 16:16:33,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:33,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:33,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:33,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:33,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 16:16:33,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930884762] [2020-09-11 16:16:33,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:33,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:33,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:33,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:33,680 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-09-11 16:16:33,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:33,927 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-11 16:16:33,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:16:33,928 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 16:16:33,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:33,929 INFO L225 Difference]: With dead ends: 84 [2020-09-11 16:16:33,929 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 16:16:33,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:16:33,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 16:16:33,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-11 16:16:33,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 16:16:33,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 16:16:33,934 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-11 16:16:33,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:33,934 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 16:16:33,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:33,935 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 16:16:33,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:33,935 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:33,935 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:34,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-11 16:16:34,148 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:34,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:34,149 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-09-11 16:16:34,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:34,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211999502] [2020-09-11 16:16:34,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:34,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211999502] [2020-09-11 16:16:34,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479788237] [2020-09-11 16:16:34,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:34,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:34,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:34,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:34,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:34,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:34,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:34,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:34,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 16:16:34,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991100430] [2020-09-11 16:16:34,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:34,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:34,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:34,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:34,358 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-11 16:16:34,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:34,659 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-11 16:16:34,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:16:34,660 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 16:16:34,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:34,661 INFO L225 Difference]: With dead ends: 81 [2020-09-11 16:16:34,661 INFO L226 Difference]: Without dead ends: 75 [2020-09-11 16:16:34,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:16:34,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-11 16:16:34,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-09-11 16:16:34,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 16:16:34,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 16:16:34,667 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-11 16:16:34,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:34,667 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 16:16:34,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:34,667 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 16:16:34,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:34,667 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:34,668 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:34,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-11 16:16:34,876 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:34,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:34,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-09-11 16:16:34,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:34,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595002674] [2020-09-11 16:16:34,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:34,984 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:34,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595002674] [2020-09-11 16:16:34,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086729563] [2020-09-11 16:16:34,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:35,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 16:16:35,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:35,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:35,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:35,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:35,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:35,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 16:16:35,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233116376] [2020-09-11 16:16:35,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:35,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:35,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:35,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:35,050 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-11 16:16:35,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:35,319 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-11 16:16:35,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:35,320 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 16:16:35,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:35,321 INFO L225 Difference]: With dead ends: 78 [2020-09-11 16:16:35,321 INFO L226 Difference]: Without dead ends: 72 [2020-09-11 16:16:35,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:16:35,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-11 16:16:35,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-09-11 16:16:35,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 16:16:35,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 16:16:35,324 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-11 16:16:35,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:35,325 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 16:16:35,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:35,325 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 16:16:35,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:35,325 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:35,325 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:35,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-11 16:16:35,534 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:35,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:35,535 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-09-11 16:16:35,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:35,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581327641] [2020-09-11 16:16:35,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:35,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:35,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581327641] [2020-09-11 16:16:35,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154418122] [2020-09-11 16:16:35,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:35,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:35,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:35,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:35,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:35,753 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:35,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:35,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 16:16:35,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573502771] [2020-09-11 16:16:35,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:35,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:35,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:35,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:35,768 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-11 16:16:36,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:36,163 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-11 16:16:36,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:16:36,164 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 16:16:36,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:36,165 INFO L225 Difference]: With dead ends: 77 [2020-09-11 16:16:36,165 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 16:16:36,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-09-11 16:16:36,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 16:16:36,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-09-11 16:16:36,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 16:16:36,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 16:16:36,171 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-11 16:16:36,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:36,171 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 16:16:36,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:36,172 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 16:16:36,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:36,172 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:36,172 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:36,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-11 16:16:36,381 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:36,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:36,382 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-09-11 16:16:36,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:36,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362365001] [2020-09-11 16:16:36,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:36,491 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:36,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362365001] [2020-09-11 16:16:36,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191089130] [2020-09-11 16:16:36,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:36,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 16:16:36,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:36,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:36,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:36,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:36,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 16:16:36,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628439517] [2020-09-11 16:16:36,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:36,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:36,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:36,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:36,566 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-11 16:16:36,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:36,893 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-09-11 16:16:36,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:16:36,894 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 16:16:36,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:36,894 INFO L225 Difference]: With dead ends: 74 [2020-09-11 16:16:36,894 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 16:16:36,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:16:36,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 16:16:36,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-09-11 16:16:36,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 16:16:36,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 16:16:36,898 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-11 16:16:36,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:36,898 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 16:16:36,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:36,898 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 16:16:36,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:36,899 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:36,899 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:37,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:37,107 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:37,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:37,108 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-09-11 16:16:37,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:37,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671168111] [2020-09-11 16:16:37,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:37,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:37,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671168111] [2020-09-11 16:16:37,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922127119] [2020-09-11 16:16:37,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:37,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 16:16:37,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:37,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:37,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:37,312 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:37,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:37,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 16:16:37,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797153394] [2020-09-11 16:16:37,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:37,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:37,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:37,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:37,328 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-11 16:16:37,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:37,798 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-09-11 16:16:37,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:16:37,798 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 16:16:37,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:37,799 INFO L225 Difference]: With dead ends: 73 [2020-09-11 16:16:37,799 INFO L226 Difference]: Without dead ends: 67 [2020-09-11 16:16:37,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:16:37,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-11 16:16:37,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-09-11 16:16:37,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 16:16:37,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 16:16:37,804 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-11 16:16:37,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:37,805 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 16:16:37,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:37,805 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 16:16:37,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:37,806 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:37,806 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:38,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-11 16:16:38,015 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:38,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:38,016 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-09-11 16:16:38,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:38,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928307561] [2020-09-11 16:16:38,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:38,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:38,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928307561] [2020-09-11 16:16:38,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12148969] [2020-09-11 16:16:38,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:38,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:38,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:38,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:38,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 16:16:38,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020780242] [2020-09-11 16:16:38,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:38,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:38,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:38,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:38,189 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-11 16:16:38,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:38,567 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-11 16:16:38,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:16:38,573 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 16:16:38,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:38,574 INFO L225 Difference]: With dead ends: 89 [2020-09-11 16:16:38,574 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 16:16:38,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-09-11 16:16:38,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 16:16:38,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-11 16:16:38,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-11 16:16:38,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-09-11 16:16:38,577 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-09-11 16:16:38,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:38,577 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-09-11 16:16:38,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:38,577 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-09-11 16:16:38,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:38,578 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:38,578 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:38,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:38,787 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:38,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:38,788 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-09-11 16:16:38,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:38,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495651272] [2020-09-11 16:16:38,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:38,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:38,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495651272] [2020-09-11 16:16:38,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780440281] [2020-09-11 16:16:38,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:38,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:38,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:38,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:38,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:39,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:39,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:39,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 16:16:39,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568757927] [2020-09-11 16:16:39,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:39,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:39,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:39,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:39,001 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-09-11 16:16:39,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:39,415 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-09-11 16:16:39,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:16:39,416 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 16:16:39,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:39,416 INFO L225 Difference]: With dead ends: 68 [2020-09-11 16:16:39,417 INFO L226 Difference]: Without dead ends: 60 [2020-09-11 16:16:39,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:16:39,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-11 16:16:39,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-09-11 16:16:39,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-11 16:16:39,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-09-11 16:16:39,420 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-09-11 16:16:39,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:39,421 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-09-11 16:16:39,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:39,421 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-09-11 16:16:39,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:39,421 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:39,421 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:39,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-11 16:16:39,630 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:39,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:39,631 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-09-11 16:16:39,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:39,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897079690] [2020-09-11 16:16:39,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:39,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897079690] [2020-09-11 16:16:39,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272464921] [2020-09-11 16:16:39,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:39,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 16:16:39,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:39,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:39,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:39,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:39,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:39,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 16:16:39,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564777383] [2020-09-11 16:16:39,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:39,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:39,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:39,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:39,848 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-09-11 16:16:40,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:40,299 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-09-11 16:16:40,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:16:40,299 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 16:16:40,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:40,300 INFO L225 Difference]: With dead ends: 76 [2020-09-11 16:16:40,300 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 16:16:40,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-09-11 16:16:40,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 16:16:40,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-09-11 16:16:40,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 16:16:40,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-11 16:16:40,306 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-09-11 16:16:40,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:40,306 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-11 16:16:40,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:40,306 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-11 16:16:40,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:40,307 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:40,307 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:40,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:40,516 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:40,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:40,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-09-11 16:16:40,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:40,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942599170] [2020-09-11 16:16:40,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:40,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:40,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942599170] [2020-09-11 16:16:40,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676353446] [2020-09-11 16:16:40,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:40,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:40,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:40,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:40,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:40,706 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:40,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:40,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 16:16:40,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848214909] [2020-09-11 16:16:40,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:40,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:40,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:40,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:40,723 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-09-11 16:16:41,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:41,241 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-09-11 16:16:41,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:16:41,242 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 16:16:41,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:41,243 INFO L225 Difference]: With dead ends: 66 [2020-09-11 16:16:41,243 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 16:16:41,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-09-11 16:16:41,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 16:16:41,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-09-11 16:16:41,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 16:16:41,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-11 16:16:41,246 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-09-11 16:16:41,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:41,247 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-11 16:16:41,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:41,247 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-11 16:16:41,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:41,247 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:41,247 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:41,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-11 16:16:41,457 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:41,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:41,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-09-11 16:16:41,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:41,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866272398] [2020-09-11 16:16:41,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:41,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:41,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866272398] [2020-09-11 16:16:41,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541727693] [2020-09-11 16:16:41,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:41,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 16:16:41,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:41,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:41,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:41,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:41,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:41,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 16:16:41,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876977212] [2020-09-11 16:16:41,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:41,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:41,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:41,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:41,671 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-09-11 16:16:41,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:41,889 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-09-11 16:16:41,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:16:41,890 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 16:16:41,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:41,891 INFO L225 Difference]: With dead ends: 72 [2020-09-11 16:16:41,891 INFO L226 Difference]: Without dead ends: 66 [2020-09-11 16:16:41,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:16:41,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-11 16:16:41,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-11 16:16:41,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 16:16:41,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-09-11 16:16:41,895 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-09-11 16:16:41,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:41,895 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-09-11 16:16:41,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:41,895 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-09-11 16:16:41,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:41,896 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:41,896 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:42,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-11 16:16:42,106 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:42,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:42,107 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-09-11 16:16:42,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:42,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431604504] [2020-09-11 16:16:42,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:42,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:42,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431604504] [2020-09-11 16:16:42,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215339704] [2020-09-11 16:16:42,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:42,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 16:16:42,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:42,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:42,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:42,338 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:42,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:42,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 16:16:42,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684340996] [2020-09-11 16:16:42,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:42,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:42,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:42,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:42,363 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-09-11 16:16:42,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:42,625 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-09-11 16:16:42,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:16:42,630 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 16:16:42,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:42,631 INFO L225 Difference]: With dead ends: 82 [2020-09-11 16:16:42,631 INFO L226 Difference]: Without dead ends: 76 [2020-09-11 16:16:42,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:16:42,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-11 16:16:42,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-11 16:16:42,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 16:16:42,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-09-11 16:16:42,634 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-09-11 16:16:42,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:42,634 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-09-11 16:16:42,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:42,635 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-09-11 16:16:42,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:42,635 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:42,635 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:42,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-11 16:16:42,843 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:42,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:42,844 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-09-11 16:16:42,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:42,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617491501] [2020-09-11 16:16:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:43,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617491501] [2020-09-11 16:16:43,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594872172] [2020-09-11 16:16:43,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:43,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:43,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:43,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:43,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:43,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 16:16:43,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499401511] [2020-09-11 16:16:43,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:43,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:43,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:43,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:43,109 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-09-11 16:16:43,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:43,382 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-09-11 16:16:43,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:16:43,383 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 16:16:43,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:43,384 INFO L225 Difference]: With dead ends: 83 [2020-09-11 16:16:43,384 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 16:16:43,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:16:43,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 16:16:43,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-09-11 16:16:43,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-11 16:16:43,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-09-11 16:16:43,390 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-09-11 16:16:43,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:43,390 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-09-11 16:16:43,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:43,390 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-09-11 16:16:43,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:43,392 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:43,392 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:43,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-11 16:16:43,593 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:43,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:43,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-09-11 16:16:43,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:43,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903457145] [2020-09-11 16:16:43,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:43,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:43,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903457145] [2020-09-11 16:16:43,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116786132] [2020-09-11 16:16:43,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:43,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:43,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:43,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:43,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:43,827 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:43,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:43,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:43,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 16:16:43,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640692531] [2020-09-11 16:16:43,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:43,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:43,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:43,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:43,840 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-09-11 16:16:44,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:44,179 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-09-11 16:16:44,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:16:44,180 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 16:16:44,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:44,181 INFO L225 Difference]: With dead ends: 89 [2020-09-11 16:16:44,181 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 16:16:44,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-09-11 16:16:44,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 16:16:44,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-09-11 16:16:44,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 16:16:44,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-09-11 16:16:44,184 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-09-11 16:16:44,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:44,184 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-09-11 16:16:44,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:44,185 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-09-11 16:16:44,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:44,185 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:44,185 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:44,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:44,394 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:44,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:44,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-09-11 16:16:44,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:44,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98406369] [2020-09-11 16:16:44,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:44,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:44,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98406369] [2020-09-11 16:16:44,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421877481] [2020-09-11 16:16:44,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:44,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 16:16:44,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:44,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:44,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:44,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:44,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 16:16:44,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951719739] [2020-09-11 16:16:44,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:44,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:44,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:44,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:44,593 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-09-11 16:16:44,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:44,962 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-09-11 16:16:44,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:16:44,963 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 16:16:44,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:44,964 INFO L225 Difference]: With dead ends: 89 [2020-09-11 16:16:44,964 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 16:16:44,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:16:44,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 16:16:44,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-09-11 16:16:44,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 16:16:44,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 16:16:44,967 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-09-11 16:16:44,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:44,968 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 16:16:44,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:44,968 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 16:16:44,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:44,968 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:44,968 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:45,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:45,169 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:45,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:45,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-09-11 16:16:45,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:45,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025361019] [2020-09-11 16:16:45,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:45,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025361019] [2020-09-11 16:16:45,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333839383] [2020-09-11 16:16:45,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:45,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:45,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:45,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:45,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:45,395 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:45,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:45,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:45,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 16:16:45,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818959888] [2020-09-11 16:16:45,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:45,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:45,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:45,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:45,411 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-09-11 16:16:45,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:45,876 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-09-11 16:16:45,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:16:45,877 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 16:16:45,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:45,878 INFO L225 Difference]: With dead ends: 86 [2020-09-11 16:16:45,878 INFO L226 Difference]: Without dead ends: 80 [2020-09-11 16:16:45,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-09-11 16:16:45,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-11 16:16:45,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-09-11 16:16:45,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 16:16:45,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 16:16:45,881 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-09-11 16:16:45,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:45,881 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 16:16:45,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:45,881 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 16:16:45,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:45,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:45,882 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:46,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-11 16:16:46,089 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:46,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:46,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-09-11 16:16:46,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:46,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986702896] [2020-09-11 16:16:46,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:46,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986702896] [2020-09-11 16:16:46,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494436660] [2020-09-11 16:16:46,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:46,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 16:16:46,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:46,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:46,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:46,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:46,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:46,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 16:16:46,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416199550] [2020-09-11 16:16:46,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:46,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:46,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:46,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:46,274 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-09-11 16:16:46,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:46,671 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-09-11 16:16:46,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:16:46,671 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 16:16:46,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:46,672 INFO L225 Difference]: With dead ends: 87 [2020-09-11 16:16:46,673 INFO L226 Difference]: Without dead ends: 81 [2020-09-11 16:16:46,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-09-11 16:16:46,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-11 16:16:46,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-09-11 16:16:46,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-11 16:16:46,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-09-11 16:16:46,675 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-09-11 16:16:46,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:46,675 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-09-11 16:16:46,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:46,675 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-09-11 16:16:46,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:46,676 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:46,676 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:46,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:46,877 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:46,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:46,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-09-11 16:16:46,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:46,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516216372] [2020-09-11 16:16:46,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:47,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516216372] [2020-09-11 16:16:47,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396111084] [2020-09-11 16:16:47,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:47,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 16:16:47,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:47,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:47,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:47,090 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:47,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:47,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 16:16:47,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071033466] [2020-09-11 16:16:47,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:47,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:47,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:47,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:47,106 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-09-11 16:16:47,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:47,625 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-09-11 16:16:47,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:16:47,626 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 16:16:47,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:47,627 INFO L225 Difference]: With dead ends: 84 [2020-09-11 16:16:47,627 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 16:16:47,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-09-11 16:16:47,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 16:16:47,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-09-11 16:16:47,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 16:16:47,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-11 16:16:47,630 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-09-11 16:16:47,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:47,630 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-11 16:16:47,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:47,630 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-11 16:16:47,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:47,631 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:47,631 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:47,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-11 16:16:47,832 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:47,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:47,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-09-11 16:16:47,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:47,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189692819] [2020-09-11 16:16:47,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:47,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:47,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189692819] [2020-09-11 16:16:47,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227507154] [2020-09-11 16:16:47,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:47,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:47,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:48,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:48,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:48,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 16:16:48,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358404763] [2020-09-11 16:16:48,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:48,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:48,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:48,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:48,017 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-09-11 16:16:48,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:48,499 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-11 16:16:48,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:16:48,499 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 16:16:48,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:48,500 INFO L225 Difference]: With dead ends: 104 [2020-09-11 16:16:48,500 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 16:16:48,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-09-11 16:16:48,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 16:16:48,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-09-11 16:16:48,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 16:16:48,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-09-11 16:16:48,504 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-09-11 16:16:48,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:48,504 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-09-11 16:16:48,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:48,505 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-09-11 16:16:48,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:48,505 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:48,505 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:48,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-11 16:16:48,706 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:48,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:48,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-09-11 16:16:48,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:48,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870421073] [2020-09-11 16:16:48,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:48,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:48,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870421073] [2020-09-11 16:16:48,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824060933] [2020-09-11 16:16:48,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:48,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:48,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:48,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:48,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:48,921 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:48,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:48,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 16:16:48,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40723904] [2020-09-11 16:16:48,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:48,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:48,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:48,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:48,947 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-09-11 16:16:49,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:49,520 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-09-11 16:16:49,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:16:49,521 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 16:16:49,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:49,522 INFO L225 Difference]: With dead ends: 85 [2020-09-11 16:16:49,522 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 16:16:49,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:16:49,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 16:16:49,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-09-11 16:16:49,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-11 16:16:49,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-09-11 16:16:49,526 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-09-11 16:16:49,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:49,526 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-09-11 16:16:49,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:49,527 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-09-11 16:16:49,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:49,527 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:49,527 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:49,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-11 16:16:49,737 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:49,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:49,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-09-11 16:16:49,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:49,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223757089] [2020-09-11 16:16:49,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:49,902 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:49,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223757089] [2020-09-11 16:16:49,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383336468] [2020-09-11 16:16:49,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:49,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 16:16:49,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:49,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:49,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:49,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:49,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 16:16:49,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343201335] [2020-09-11 16:16:49,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:49,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:49,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:49,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:49,970 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-09-11 16:16:50,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:50,198 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-11 16:16:50,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:50,199 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 16:16:50,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:50,200 INFO L225 Difference]: With dead ends: 94 [2020-09-11 16:16:50,200 INFO L226 Difference]: Without dead ends: 88 [2020-09-11 16:16:50,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:16:50,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-11 16:16:50,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-09-11 16:16:50,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 16:16:50,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 16:16:50,203 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 16:16:50,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:50,203 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 16:16:50,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:50,204 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 16:16:50,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:50,204 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:50,204 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:50,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-11 16:16:50,412 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:50,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:50,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-09-11 16:16:50,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:50,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219899583] [2020-09-11 16:16:50,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:50,591 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:50,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219899583] [2020-09-11 16:16:50,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054359161] [2020-09-11 16:16:50,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:50,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:50,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:50,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:50,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:50,667 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:50,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:50,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 16:16:50,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222963291] [2020-09-11 16:16:50,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:16:50,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:50,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:16:50,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:50,682 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 16:16:51,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:51,048 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-09-11 16:16:51,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:16:51,049 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 16:16:51,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:51,050 INFO L225 Difference]: With dead ends: 91 [2020-09-11 16:16:51,050 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 16:16:51,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:16:51,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 16:16:51,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-11 16:16:51,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:16:51,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 16:16:51,053 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 16:16:51,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:51,054 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 16:16:51,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:16:51,054 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 16:16:51,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:51,054 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:51,055 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:51,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-11 16:16:51,260 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:51,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:51,261 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-09-11 16:16:51,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:51,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523698544] [2020-09-11 16:16:51,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:51,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523698544] [2020-09-11 16:16:51,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878930175] [2020-09-11 16:16:51,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:51,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 16:16:51,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:51,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:51,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:51,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:51,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 16:16:51,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500266857] [2020-09-11 16:16:51,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:51,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:51,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:51,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:51,475 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 16:16:51,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:51,775 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-11 16:16:51,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:16:51,775 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 16:16:51,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:51,776 INFO L225 Difference]: With dead ends: 88 [2020-09-11 16:16:51,776 INFO L226 Difference]: Without dead ends: 82 [2020-09-11 16:16:51,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-09-11 16:16:51,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-11 16:16:51,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-09-11 16:16:51,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 16:16:51,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 16:16:51,779 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 16:16:51,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:51,779 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 16:16:51,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:51,780 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 16:16:51,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:51,780 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:51,780 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:51,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:51,981 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:51,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:51,982 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-09-11 16:16:51,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:51,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630475289] [2020-09-11 16:16:51,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:52,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630475289] [2020-09-11 16:16:52,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323181781] [2020-09-11 16:16:52,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:52,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 16:16:52,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:52,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:52,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:52,213 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:52,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:52,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 16:16:52,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295883777] [2020-09-11 16:16:52,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:16:52,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:52,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:16:52,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:52,229 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 16:16:52,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:52,679 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-09-11 16:16:52,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:16:52,679 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 16:16:52,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:52,680 INFO L225 Difference]: With dead ends: 87 [2020-09-11 16:16:52,681 INFO L226 Difference]: Without dead ends: 81 [2020-09-11 16:16:52,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-09-11 16:16:52,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-11 16:16:52,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-09-11 16:16:52,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:16:52,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 16:16:52,685 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 16:16:52,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:52,685 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 16:16:52,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:16:52,685 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 16:16:52,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:52,686 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:52,686 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:52,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:52,891 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:52,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:52,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-09-11 16:16:52,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:52,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370997003] [2020-09-11 16:16:52,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:53,033 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:53,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370997003] [2020-09-11 16:16:53,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580880321] [2020-09-11 16:16:53,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:53,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:53,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:53,110 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:53,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:53,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 16:16:53,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250999691] [2020-09-11 16:16:53,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:53,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:53,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:53,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:53,111 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 16:16:53,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:53,497 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-09-11 16:16:53,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:16:53,497 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 16:16:53,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:53,498 INFO L225 Difference]: With dead ends: 84 [2020-09-11 16:16:53,498 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 16:16:53,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-11 16:16:53,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 16:16:53,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-09-11 16:16:53,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 16:16:53,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 16:16:53,501 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 16:16:53,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:53,502 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 16:16:53,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:53,502 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 16:16:53,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:53,502 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:53,503 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:53,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-09-11 16:16:53,703 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:53,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:53,704 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-09-11 16:16:53,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:53,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076798444] [2020-09-11 16:16:53,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:53,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076798444] [2020-09-11 16:16:53,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533522011] [2020-09-11 16:16:53,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:53,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:53,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:53,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:53,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:53,960 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:53,975 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:53,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:53,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 16:16:53,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034119283] [2020-09-11 16:16:53,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:16:53,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:53,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:16:53,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:53,978 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 16:16:54,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:54,505 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-11 16:16:54,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:16:54,506 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 16:16:54,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:54,507 INFO L225 Difference]: With dead ends: 83 [2020-09-11 16:16:54,507 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 16:16:54,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-11 16:16:54,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 16:16:54,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-09-11 16:16:54,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:16:54,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 16:16:54,511 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 16:16:54,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:54,511 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 16:16:54,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:16:54,511 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 16:16:54,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:54,512 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:54,512 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:54,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:54,715 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:54,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:54,716 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-09-11 16:16:54,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:54,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791465263] [2020-09-11 16:16:54,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:54,860 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:54,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791465263] [2020-09-11 16:16:54,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745354500] [2020-09-11 16:16:54,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:54,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 16:16:54,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:54,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:54,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:54,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:54,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 16:16:54,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979017357] [2020-09-11 16:16:54,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:54,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:54,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:54,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:54,935 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 16:16:55,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:55,379 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-09-11 16:16:55,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:16:55,379 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 16:16:55,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:55,380 INFO L225 Difference]: With dead ends: 80 [2020-09-11 16:16:55,380 INFO L226 Difference]: Without dead ends: 74 [2020-09-11 16:16:55,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-09-11 16:16:55,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-11 16:16:55,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-09-11 16:16:55,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 16:16:55,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 16:16:55,383 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 16:16:55,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:55,384 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 16:16:55,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:55,384 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 16:16:55,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:55,384 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:55,384 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:55,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-11 16:16:55,585 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:55,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:55,586 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-09-11 16:16:55,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:55,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347148013] [2020-09-11 16:16:55,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:55,734 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:55,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347148013] [2020-09-11 16:16:55,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520705520] [2020-09-11 16:16:55,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:55,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:55,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:55,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:55,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:55,814 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:55,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:55,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 16:16:55,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447841643] [2020-09-11 16:16:55,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:16:55,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:55,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:16:55,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:55,837 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 16:16:56,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:56,441 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-09-11 16:16:56,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:16:56,442 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 16:16:56,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:56,443 INFO L225 Difference]: With dead ends: 79 [2020-09-11 16:16:56,443 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 16:16:56,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 16:16:56,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 16:16:56,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-09-11 16:16:56,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:16:56,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 16:16:56,446 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 16:16:56,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:56,446 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 16:16:56,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:16:56,446 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 16:16:56,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:56,447 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:56,447 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:56,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:56,648 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:56,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:56,648 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-09-11 16:16:56,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:56,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424992115] [2020-09-11 16:16:56,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:56,794 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:56,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424992115] [2020-09-11 16:16:56,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654304895] [2020-09-11 16:16:56,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:56,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 16:16:56,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:56,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:56,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:56,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:56,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 16:16:56,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522228762] [2020-09-11 16:16:56,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:56,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:56,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:56,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:56,877 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 16:16:57,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:57,373 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-11 16:16:57,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:16:57,374 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 16:16:57,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:57,375 INFO L225 Difference]: With dead ends: 95 [2020-09-11 16:16:57,375 INFO L226 Difference]: Without dead ends: 89 [2020-09-11 16:16:57,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:16:57,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-11 16:16:57,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-09-11 16:16:57,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 16:16:57,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-09-11 16:16:57,378 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-09-11 16:16:57,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:57,379 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-09-11 16:16:57,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:57,379 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-09-11 16:16:57,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:57,379 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:57,379 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:57,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-11 16:16:57,580 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:57,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:57,581 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-09-11 16:16:57,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:57,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696255787] [2020-09-11 16:16:57,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:57,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696255787] [2020-09-11 16:16:57,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097354424] [2020-09-11 16:16:57,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:57,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 16:16:57,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:57,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:57,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:57,797 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:57,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:57,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 16:16:57,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966410284] [2020-09-11 16:16:57,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:16:57,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:57,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:16:57,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:57,813 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-09-11 16:16:58,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:58,476 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-09-11 16:16:58,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:16:58,477 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 16:16:58,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:58,478 INFO L225 Difference]: With dead ends: 76 [2020-09-11 16:16:58,478 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 16:16:58,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:16:58,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 16:16:58,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-09-11 16:16:58,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-11 16:16:58,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-09-11 16:16:58,481 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-09-11 16:16:58,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:58,481 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-09-11 16:16:58,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:16:58,482 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-09-11 16:16:58,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:58,482 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:58,482 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:58,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:58,683 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:58,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:58,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-09-11 16:16:58,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:58,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549444125] [2020-09-11 16:16:58,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:58,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:58,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549444125] [2020-09-11 16:16:58,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850987802] [2020-09-11 16:16:58,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:58,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:58,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:58,900 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:58,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:58,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 16:16:58,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656495497] [2020-09-11 16:16:58,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:16:58,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:58,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:16:58,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:58,925 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-09-11 16:16:59,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:59,561 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-09-11 16:16:59,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:16:59,562 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 16:16:59,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:59,563 INFO L225 Difference]: With dead ends: 84 [2020-09-11 16:16:59,563 INFO L226 Difference]: Without dead ends: 79 [2020-09-11 16:16:59,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:16:59,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-11 16:16:59,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-09-11 16:16:59,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 16:16:59,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-11 16:16:59,566 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-09-11 16:16:59,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:59,567 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-11 16:16:59,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:16:59,567 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-11 16:16:59,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:16:59,568 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:59,568 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:59,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-11 16:16:59,775 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:59,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:59,776 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-09-11 16:16:59,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:59,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071943188] [2020-09-11 16:16:59,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:59,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:59,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071943188] [2020-09-11 16:16:59,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048387709] [2020-09-11 16:16:59,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:16:59,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:59,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:59,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:16:59,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:00,011 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:17:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:00,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:00,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:17:00,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058322800] [2020-09-11 16:17:00,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:00,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:00,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:00,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:00,028 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-09-11 16:17:00,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:00,690 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-09-11 16:17:00,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:17:00,691 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:00,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:00,692 INFO L225 Difference]: With dead ends: 72 [2020-09-11 16:17:00,692 INFO L226 Difference]: Without dead ends: 67 [2020-09-11 16:17:00,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:17:00,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-11 16:17:00,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-09-11 16:17:00,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 16:17:00,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-11 16:17:00,695 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-09-11 16:17:00,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:00,695 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-11 16:17:00,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:00,695 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-11 16:17:00,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:00,696 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:00,696 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:00,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-09-11 16:17:00,902 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:00,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:00,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-09-11 16:17:00,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:00,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54227692] [2020-09-11 16:17:00,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:01,097 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:01,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54227692] [2020-09-11 16:17:01,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066356400] [2020-09-11 16:17:01,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:17:01,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 16:17:01,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:01,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:01,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:01,173 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:01,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:01,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 16:17:01,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134010362] [2020-09-11 16:17:01,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:17:01,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:01,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:17:01,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:17:01,176 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-09-11 16:17:01,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:01,466 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-09-11 16:17:01,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:17:01,467 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 16:17:01,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:01,468 INFO L225 Difference]: With dead ends: 78 [2020-09-11 16:17:01,468 INFO L226 Difference]: Without dead ends: 72 [2020-09-11 16:17:01,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-09-11 16:17:01,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-11 16:17:01,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-09-11 16:17:01,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 16:17:01,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-09-11 16:17:01,472 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-09-11 16:17:01,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:01,472 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-09-11 16:17:01,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:17:01,472 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-09-11 16:17:01,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:01,473 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:01,473 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:01,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:01,679 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:01,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:01,680 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-09-11 16:17:01,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:01,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433219200] [2020-09-11 16:17:01,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:01,878 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:01,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433219200] [2020-09-11 16:17:01,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565326982] [2020-09-11 16:17:01,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:17:01,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:01,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:01,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:01,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:01,955 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:01,966 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:01,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:01,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:17:01,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676277238] [2020-09-11 16:17:01,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:01,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:01,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:01,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:01,967 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-09-11 16:17:02,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:02,303 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-09-11 16:17:02,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:17:02,304 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:02,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:02,305 INFO L225 Difference]: With dead ends: 90 [2020-09-11 16:17:02,305 INFO L226 Difference]: Without dead ends: 84 [2020-09-11 16:17:02,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:17:02,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-11 16:17:02,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-09-11 16:17:02,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 16:17:02,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-09-11 16:17:02,307 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-09-11 16:17:02,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:02,307 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-09-11 16:17:02,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:02,307 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-09-11 16:17:02,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:02,307 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:02,307 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:02,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:02,508 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:02,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:02,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-09-11 16:17:02,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:02,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114800400] [2020-09-11 16:17:02,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:02,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:02,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114800400] [2020-09-11 16:17:02,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120841949] [2020-09-11 16:17:02,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:17:02,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 16:17:02,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:02,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:02,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:02,750 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:02,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:02,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 16:17:02,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799926217] [2020-09-11 16:17:02,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:17:02,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:02,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:17:02,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:17:02,752 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-09-11 16:17:03,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:03,133 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-09-11 16:17:03,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:17:03,134 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 16:17:03,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:03,135 INFO L225 Difference]: With dead ends: 91 [2020-09-11 16:17:03,135 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 16:17:03,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-11 16:17:03,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 16:17:03,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-09-11 16:17:03,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-11 16:17:03,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-09-11 16:17:03,138 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-09-11 16:17:03,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:03,138 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-09-11 16:17:03,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:17:03,139 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-09-11 16:17:03,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:03,139 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:03,139 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:03,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:03,340 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:03,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:03,341 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-09-11 16:17:03,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:03,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272619142] [2020-09-11 16:17:03,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:03,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:03,516 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:03,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272619142] [2020-09-11 16:17:03,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806714220] [2020-09-11 16:17:03,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:17:03,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-11 16:17:03,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:03,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:03,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:03,616 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:03,632 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:03,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:03,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:17:03,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092390019] [2020-09-11 16:17:03,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:03,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:03,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:03,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:03,634 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-09-11 16:17:04,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:04,061 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-09-11 16:17:04,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:17:04,061 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:04,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:04,062 INFO L225 Difference]: With dead ends: 99 [2020-09-11 16:17:04,062 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 16:17:04,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-09-11 16:17:04,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 16:17:04,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-09-11 16:17:04,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 16:17:04,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-09-11 16:17:04,065 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-09-11 16:17:04,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:04,065 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-09-11 16:17:04,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:04,065 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-09-11 16:17:04,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:04,066 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:04,066 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:04,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:04,267 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:04,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:04,267 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-09-11 16:17:04,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:04,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979714300] [2020-09-11 16:17:04,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:04,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:04,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979714300] [2020-09-11 16:17:04,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967219367] [2020-09-11 16:17:04,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:17:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:04,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:04,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:04,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:04,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 16:17:04,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947520398] [2020-09-11 16:17:04,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:17:04,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:04,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:17:04,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:17:04,532 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-09-11 16:17:04,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:04,919 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-11 16:17:04,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:17:04,920 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 16:17:04,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:04,921 INFO L225 Difference]: With dead ends: 99 [2020-09-11 16:17:04,921 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 16:17:04,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-11 16:17:04,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 16:17:04,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-09-11 16:17:04,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-11 16:17:04,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-09-11 16:17:04,924 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-09-11 16:17:04,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:04,924 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-09-11 16:17:04,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:17:04,924 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-09-11 16:17:04,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:04,925 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:04,925 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:05,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-09-11 16:17:05,126 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:05,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:05,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-09-11 16:17:05,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:05,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973386642] [2020-09-11 16:17:05,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:05,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:05,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973386642] [2020-09-11 16:17:05,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687119548] [2020-09-11 16:17:05,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:17:05,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:05,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:05,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:05,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:05,410 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:05,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:05,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:17:05,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695747075] [2020-09-11 16:17:05,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:05,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:05,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:05,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:05,431 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-09-11 16:17:05,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:05,959 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-09-11 16:17:05,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:17:05,960 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:05,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:05,961 INFO L225 Difference]: With dead ends: 96 [2020-09-11 16:17:05,961 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 16:17:05,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:17:05,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 16:17:05,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-09-11 16:17:05,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-11 16:17:05,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-09-11 16:17:05,964 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-09-11 16:17:05,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:05,964 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-09-11 16:17:05,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:05,964 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-09-11 16:17:05,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:05,964 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:05,964 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:06,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:06,165 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:06,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:06,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-09-11 16:17:06,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:06,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911201326] [2020-09-11 16:17:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:06,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911201326] [2020-09-11 16:17:06,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507676535] [2020-09-11 16:17:06,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:17:06,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 16:17:06,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:06,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:06,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:06,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:06,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 16:17:06,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502354382] [2020-09-11 16:17:06,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:17:06,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:06,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:17:06,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:17:06,415 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-09-11 16:17:06,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:06,919 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-09-11 16:17:06,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:17:06,920 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 16:17:06,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:06,921 INFO L225 Difference]: With dead ends: 97 [2020-09-11 16:17:06,921 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 16:17:06,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 16:17:06,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 16:17:06,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-09-11 16:17:06,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 16:17:06,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 16:17:06,925 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-09-11 16:17:06,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:06,926 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 16:17:06,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:17:06,926 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 16:17:06,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:06,926 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:06,926 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:07,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-09-11 16:17:07,131 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:07,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:07,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-09-11 16:17:07,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:07,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050458817] [2020-09-11 16:17:07,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:07,275 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:07,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050458817] [2020-09-11 16:17:07,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890783554] [2020-09-11 16:17:07,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:17:07,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:07,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:07,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:07,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:07,391 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:07,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:07,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:17:07,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338818944] [2020-09-11 16:17:07,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:07,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:07,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:07,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:07,409 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-09-11 16:17:08,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:08,060 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-11 16:17:08,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:17:08,061 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:08,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:08,062 INFO L225 Difference]: With dead ends: 94 [2020-09-11 16:17:08,062 INFO L226 Difference]: Without dead ends: 88 [2020-09-11 16:17:08,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 16:17:08,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-11 16:17:08,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-09-11 16:17:08,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:17:08,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 16:17:08,066 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-09-11 16:17:08,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:08,067 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 16:17:08,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:08,067 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 16:17:08,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:08,068 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:08,068 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:08,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:08,278 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:08,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:08,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-09-11 16:17:08,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:08,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672298944] [2020-09-11 16:17:08,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:08,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:08,473 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:08,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672298944] [2020-09-11 16:17:08,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855942604] [2020-09-11 16:17:08,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:17:08,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 16:17:08,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:08,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:08,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:08,591 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:08,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:08,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 16:17:08,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329237849] [2020-09-11 16:17:08,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:17:08,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:08,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:17:08,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:17:08,593 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-09-11 16:17:09,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:09,056 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-09-11 16:17:09,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:17:09,057 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 16:17:09,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:09,057 INFO L225 Difference]: With dead ends: 95 [2020-09-11 16:17:09,058 INFO L226 Difference]: Without dead ends: 89 [2020-09-11 16:17:09,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:17:09,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-11 16:17:09,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-09-11 16:17:09,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-11 16:17:09,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-09-11 16:17:09,060 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-09-11 16:17:09,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:09,060 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-09-11 16:17:09,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:17:09,060 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-09-11 16:17:09,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:09,060 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:09,061 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:09,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-11 16:17:09,261 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:09,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:09,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-09-11 16:17:09,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:09,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754094637] [2020-09-11 16:17:09,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:09,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:09,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754094637] [2020-09-11 16:17:09,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188549784] [2020-09-11 16:17:09,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:17:09,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-11 16:17:09,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:09,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:09,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:09,491 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:09,509 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:09,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:09,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:17:09,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141063752] [2020-09-11 16:17:09,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:09,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:09,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:09,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:09,511 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-09-11 16:17:10,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:10,184 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-09-11 16:17:10,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:17:10,185 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:10,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:10,186 INFO L225 Difference]: With dead ends: 92 [2020-09-11 16:17:10,186 INFO L226 Difference]: Without dead ends: 86 [2020-09-11 16:17:10,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:17:10,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-11 16:17:10,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-09-11 16:17:10,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 16:17:10,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-11 16:17:10,189 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-09-11 16:17:10,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:10,190 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-11 16:17:10,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:10,190 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-11 16:17:10,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:10,190 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:10,190 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:10,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:10,391 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:10,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:10,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-09-11 16:17:10,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:10,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282619303] [2020-09-11 16:17:10,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:10,523 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:10,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282619303] [2020-09-11 16:17:10,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996606223] [2020-09-11 16:17:10,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:17:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:10,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:10,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:10,615 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:10,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:10,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 16:17:10,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026657683] [2020-09-11 16:17:10,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:17:10,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:10,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:17:10,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:17:10,617 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-09-11 16:17:11,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:11,206 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-09-11 16:17:11,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:17:11,206 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 16:17:11,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:11,207 INFO L225 Difference]: With dead ends: 112 [2020-09-11 16:17:11,208 INFO L226 Difference]: Without dead ends: 106 [2020-09-11 16:17:11,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 16:17:11,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-11 16:17:11,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-09-11 16:17:11,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 16:17:11,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-09-11 16:17:11,211 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-09-11 16:17:11,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:11,211 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-09-11 16:17:11,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:17:11,211 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-09-11 16:17:11,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:11,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:11,212 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:11,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:11,420 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:11,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:11,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-09-11 16:17:11,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:11,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729229703] [2020-09-11 16:17:11,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:11,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729229703] [2020-09-11 16:17:11,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965676306] [2020-09-11 16:17:11,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:17:11,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:11,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:11,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:11,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:11,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:11,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:17:11,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577862575] [2020-09-11 16:17:11,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:11,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:11,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:11,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:11,691 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-09-11 16:17:12,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:12,344 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-09-11 16:17:12,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:17:12,344 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:12,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:12,345 INFO L225 Difference]: With dead ends: 93 [2020-09-11 16:17:12,346 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 16:17:12,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 16:17:12,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 16:17:12,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-09-11 16:17:12,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-11 16:17:12,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-09-11 16:17:12,349 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-09-11 16:17:12,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:12,349 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-09-11 16:17:12,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:12,349 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-09-11 16:17:12,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:12,350 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:12,350 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:12,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:12,560 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:12,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:12,561 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-09-11 16:17:12,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:12,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524486733] [2020-09-11 16:17:12,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:12,778 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:12,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524486733] [2020-09-11 16:17:12,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032405890] [2020-09-11 16:17:12,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:17:12,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 16:17:12,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:12,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:12,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:12,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:12,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 16:17:12,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139264255] [2020-09-11 16:17:12,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:12,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:12,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:12,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:12,855 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-09-11 16:17:13,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:13,216 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-09-11 16:17:13,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:17:13,216 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 16:17:13,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:13,217 INFO L225 Difference]: With dead ends: 104 [2020-09-11 16:17:13,217 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 16:17:13,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-09-11 16:17:13,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 16:17:13,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-09-11 16:17:13,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:17:13,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 16:17:13,220 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 16:17:13,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:13,220 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 16:17:13,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:13,221 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 16:17:13,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:13,221 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:13,221 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:13,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:13,422 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:13,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:13,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-09-11 16:17:13,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:13,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755524702] [2020-09-11 16:17:13,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:13,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:13,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755524702] [2020-09-11 16:17:13,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12725092] [2020-09-11 16:17:13,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:17:13,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:13,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:13,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:13,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:13,701 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:13,717 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:13,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:13,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:13,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178120062] [2020-09-11 16:17:13,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:13,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:13,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:13,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:13,719 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 16:17:14,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:14,170 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-09-11 16:17:14,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:17:14,171 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:14,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:14,172 INFO L225 Difference]: With dead ends: 101 [2020-09-11 16:17:14,172 INFO L226 Difference]: Without dead ends: 95 [2020-09-11 16:17:14,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-09-11 16:17:14,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-11 16:17:14,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-09-11 16:17:14,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:17:14,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 16:17:14,175 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 16:17:14,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:14,175 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 16:17:14,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:14,175 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 16:17:14,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:14,176 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:14,176 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:14,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:14,384 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:14,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:14,385 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-09-11 16:17:14,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:14,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762871773] [2020-09-11 16:17:14,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:14,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762871773] [2020-09-11 16:17:14,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212650873] [2020-09-11 16:17:14,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:17:14,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 16:17:14,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:14,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:14,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:14,678 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:14,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:14,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 16:17:14,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062404769] [2020-09-11 16:17:14,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:14,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:14,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:14,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:14,680 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 16:17:15,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:15,086 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-09-11 16:17:15,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:17:15,087 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 16:17:15,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:15,088 INFO L225 Difference]: With dead ends: 98 [2020-09-11 16:17:15,088 INFO L226 Difference]: Without dead ends: 92 [2020-09-11 16:17:15,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-09-11 16:17:15,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-11 16:17:15,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-09-11 16:17:15,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:17:15,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 16:17:15,091 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 16:17:15,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:15,091 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 16:17:15,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:15,091 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 16:17:15,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:15,092 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:15,092 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:15,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:15,301 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:15,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:15,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-09-11 16:17:15,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:15,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818020143] [2020-09-11 16:17:15,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:15,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:15,513 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:15,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818020143] [2020-09-11 16:17:15,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512959972] [2020-09-11 16:17:15,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:17:15,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-11 16:17:15,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:15,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:15,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:15,607 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:15,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:15,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:15,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589177168] [2020-09-11 16:17:15,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:15,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:15,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:15,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:15,622 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 16:17:16,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:16,177 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-09-11 16:17:16,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:17:16,178 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:16,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:16,179 INFO L225 Difference]: With dead ends: 97 [2020-09-11 16:17:16,179 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 16:17:16,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 16:17:16,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 16:17:16,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-09-11 16:17:16,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:17:16,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 16:17:16,182 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 16:17:16,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:16,183 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 16:17:16,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:16,183 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 16:17:16,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:16,183 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:16,184 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:16,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:16,392 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:16,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:16,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-09-11 16:17:16,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:16,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329863897] [2020-09-11 16:17:16,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:16,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329863897] [2020-09-11 16:17:16,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095041237] [2020-09-11 16:17:16,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:17:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:16,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:16,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:16,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:16,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 16:17:16,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516903920] [2020-09-11 16:17:16,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:16,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:16,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:16,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:16,666 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 16:17:17,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:17,137 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-09-11 16:17:17,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:17:17,138 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 16:17:17,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:17,139 INFO L225 Difference]: With dead ends: 94 [2020-09-11 16:17:17,139 INFO L226 Difference]: Without dead ends: 88 [2020-09-11 16:17:17,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:17:17,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-11 16:17:17,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-09-11 16:17:17,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:17:17,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 16:17:17,143 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 16:17:17,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:17,143 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 16:17:17,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:17,144 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 16:17:17,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:17,144 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:17,144 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:17,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-09-11 16:17:17,354 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:17,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:17,355 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-09-11 16:17:17,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:17,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489307837] [2020-09-11 16:17:17,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:17,550 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:17,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489307837] [2020-09-11 16:17:17,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133812303] [2020-09-11 16:17:17,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:17:17,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:17,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:17,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:17,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:17,630 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:17,647 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:17,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:17,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:17,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220192138] [2020-09-11 16:17:17,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:17,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:17,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:17,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:17,649 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 16:17:18,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:18,241 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-09-11 16:17:18,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:17:18,241 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:18,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:18,242 INFO L225 Difference]: With dead ends: 93 [2020-09-11 16:17:18,242 INFO L226 Difference]: Without dead ends: 87 [2020-09-11 16:17:18,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:17:18,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-11 16:17:18,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-09-11 16:17:18,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:17:18,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 16:17:18,245 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 16:17:18,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:18,246 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 16:17:18,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:18,246 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 16:17:18,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:18,246 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:18,246 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:18,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:18,447 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:18,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:18,448 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-09-11 16:17:18,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:18,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690403768] [2020-09-11 16:17:18,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:18,631 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:18,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690403768] [2020-09-11 16:17:18,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724956487] [2020-09-11 16:17:18,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:17:18,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 16:17:18,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:18,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:18,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:18,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:18,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 16:17:18,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271911847] [2020-09-11 16:17:18,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:18,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:18,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:18,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:18,716 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 16:17:19,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:19,255 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-09-11 16:17:19,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:17:19,255 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 16:17:19,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:19,257 INFO L225 Difference]: With dead ends: 90 [2020-09-11 16:17:19,257 INFO L226 Difference]: Without dead ends: 84 [2020-09-11 16:17:19,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 16:17:19,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-11 16:17:19,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-09-11 16:17:19,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:17:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 16:17:19,265 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 16:17:19,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:19,265 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 16:17:19,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:19,265 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 16:17:19,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:19,266 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:19,266 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:19,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-09-11 16:17:19,475 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:19,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:19,476 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-09-11 16:17:19,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:19,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278314803] [2020-09-11 16:17:19,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:19,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278314803] [2020-09-11 16:17:19,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17131272] [2020-09-11 16:17:19,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:17:19,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:19,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:19,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:19,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:19,748 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:19,761 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:19,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:19,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:19,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796647118] [2020-09-11 16:17:19,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:19,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:19,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:19,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:19,762 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 16:17:20,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:20,453 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-11 16:17:20,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:17:20,454 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:20,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:20,455 INFO L225 Difference]: With dead ends: 89 [2020-09-11 16:17:20,455 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 16:17:20,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 16:17:20,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 16:17:20,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-09-11 16:17:20,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:17:20,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 16:17:20,458 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 16:17:20,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:20,459 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 16:17:20,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:20,459 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 16:17:20,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:20,459 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:20,460 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:20,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:20,666 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:20,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:20,667 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-09-11 16:17:20,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:20,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495666358] [2020-09-11 16:17:20,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:20,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495666358] [2020-09-11 16:17:20,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702825936] [2020-09-11 16:17:20,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:17:20,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 16:17:20,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:20,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:20,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:20,931 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:20,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:20,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 16:17:20,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621191323] [2020-09-11 16:17:20,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:20,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:20,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:20,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:20,932 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 16:17:21,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:21,533 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-09-11 16:17:21,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:17:21,534 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 16:17:21,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:21,535 INFO L225 Difference]: With dead ends: 86 [2020-09-11 16:17:21,535 INFO L226 Difference]: Without dead ends: 80 [2020-09-11 16:17:21,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:17:21,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-11 16:17:21,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-09-11 16:17:21,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:17:21,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 16:17:21,539 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 16:17:21,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:21,539 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 16:17:21,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:21,539 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 16:17:21,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:21,540 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:21,540 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:21,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:21,750 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:21,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:21,752 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-09-11 16:17:21,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:21,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438870564] [2020-09-11 16:17:21,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:21,928 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:21,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438870564] [2020-09-11 16:17:21,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393739167] [2020-09-11 16:17:21,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:17:21,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-11 16:17:21,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:21,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:21,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:22,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:22,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:22,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:22,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096835902] [2020-09-11 16:17:22,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:22,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:22,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:22,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:22,025 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 16:17:22,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:22,822 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-09-11 16:17:22,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:17:22,823 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:22,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:22,824 INFO L225 Difference]: With dead ends: 85 [2020-09-11 16:17:22,824 INFO L226 Difference]: Without dead ends: 79 [2020-09-11 16:17:22,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 16:17:22,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-11 16:17:22,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-09-11 16:17:22,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:17:22,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 16:17:22,826 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 16:17:22,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:22,827 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 16:17:22,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:22,827 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 16:17:22,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:22,827 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:22,827 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:23,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:23,028 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:23,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:23,029 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-09-11 16:17:23,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:23,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075855226] [2020-09-11 16:17:23,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:23,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075855226] [2020-09-11 16:17:23,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455450285] [2020-09-11 16:17:23,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:17:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:23,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:23,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:23,294 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:23,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:23,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 16:17:23,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639818900] [2020-09-11 16:17:23,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:23,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:23,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:23,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:23,296 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 16:17:23,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:23,945 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-11 16:17:23,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:17:23,946 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 16:17:23,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:23,947 INFO L225 Difference]: With dead ends: 101 [2020-09-11 16:17:23,947 INFO L226 Difference]: Without dead ends: 95 [2020-09-11 16:17:23,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 16:17:23,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-11 16:17:23,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-09-11 16:17:23,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-11 16:17:23,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-09-11 16:17:23,950 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-09-11 16:17:23,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:23,950 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-09-11 16:17:23,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:23,951 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-09-11 16:17:23,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:23,951 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:23,951 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:24,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:24,161 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:24,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:24,162 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-09-11 16:17:24,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:24,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058013047] [2020-09-11 16:17:24,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:24,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058013047] [2020-09-11 16:17:24,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323292746] [2020-09-11 16:17:24,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:17:24,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:24,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:24,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:24,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:24,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:24,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:24,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365648950] [2020-09-11 16:17:24,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:24,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:24,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:24,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:24,487 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-09-11 16:17:25,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:25,231 INFO L93 Difference]: Finished difference Result 80 states and 197 transitions. [2020-09-11 16:17:25,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:17:25,232 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:25,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:25,233 INFO L225 Difference]: With dead ends: 80 [2020-09-11 16:17:25,233 INFO L226 Difference]: Without dead ends: 72 [2020-09-11 16:17:25,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 16:17:25,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-11 16:17:25,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-09-11 16:17:25,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-11 16:17:25,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-09-11 16:17:25,235 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-09-11 16:17:25,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:25,236 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-09-11 16:17:25,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:25,236 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-09-11 16:17:25,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:25,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:25,236 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:25,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:25,444 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:25,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:25,444 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-09-11 16:17:25,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:25,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616816803] [2020-09-11 16:17:25,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:25,612 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:25,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616816803] [2020-09-11 16:17:25,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182772811] [2020-09-11 16:17:25,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:17:25,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 16:17:25,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:25,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:25,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:25,695 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:17:25,713 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:25,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:25,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:25,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844943951] [2020-09-11 16:17:25,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:25,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:25,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:25,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:25,715 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-09-11 16:17:26,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:26,489 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-11 16:17:26,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:17:26,490 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:26,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:26,491 INFO L225 Difference]: With dead ends: 92 [2020-09-11 16:17:26,491 INFO L226 Difference]: Without dead ends: 87 [2020-09-11 16:17:26,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 16:17:26,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-11 16:17:26,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-09-11 16:17:26,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 16:17:26,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-11 16:17:26,494 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-09-11 16:17:26,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:26,495 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-11 16:17:26,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:26,495 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-11 16:17:26,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:26,495 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:26,496 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:26,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:26,702 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:26,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:26,702 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-09-11 16:17:26,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:26,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560541310] [2020-09-11 16:17:26,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:26,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:26,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560541310] [2020-09-11 16:17:26,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087995853] [2020-09-11 16:17:26,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:17:26,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:26,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:26,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:26,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:26,978 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:17:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:26,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:26,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:26,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136530773] [2020-09-11 16:17:26,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:26,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:26,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:26,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:26,999 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-09-11 16:17:27,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:27,843 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-09-11 16:17:27,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:17:27,844 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:27,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:27,845 INFO L225 Difference]: With dead ends: 78 [2020-09-11 16:17:27,845 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 16:17:27,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:17:27,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 16:17:27,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-09-11 16:17:27,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 16:17:27,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-11 16:17:27,847 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-09-11 16:17:27,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:27,848 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-11 16:17:27,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:27,848 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-11 16:17:27,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:27,848 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:27,848 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:28,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-09-11 16:17:28,050 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:28,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:28,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-09-11 16:17:28,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:28,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015941406] [2020-09-11 16:17:28,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:28,262 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:28,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015941406] [2020-09-11 16:17:28,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433347863] [2020-09-11 16:17:28,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:17:28,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 16:17:28,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:28,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:28,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:28,334 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:28,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:28,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:28,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069601875] [2020-09-11 16:17:28,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:28,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:28,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:28,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:28,335 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-09-11 16:17:28,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:28,678 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-11 16:17:28,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:17:28,679 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:28,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:28,679 INFO L225 Difference]: With dead ends: 84 [2020-09-11 16:17:28,680 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 16:17:28,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-09-11 16:17:28,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 16:17:28,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-09-11 16:17:28,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:17:28,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-09-11 16:17:28,682 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-09-11 16:17:28,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:28,682 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-09-11 16:17:28,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:28,683 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-09-11 16:17:28,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:28,683 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:28,683 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:28,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:28,884 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:28,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:28,885 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-09-11 16:17:28,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:28,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777141311] [2020-09-11 16:17:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:29,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777141311] [2020-09-11 16:17:29,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258873873] [2020-09-11 16:17:29,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:29,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 16:17:29,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:29,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:29,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:29,211 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:29,223 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:29,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:29,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:29,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600764773] [2020-09-11 16:17:29,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:29,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:29,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:29,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:29,225 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-09-11 16:17:29,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:29,650 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-09-11 16:17:29,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:17:29,651 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:29,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:29,652 INFO L225 Difference]: With dead ends: 98 [2020-09-11 16:17:29,652 INFO L226 Difference]: Without dead ends: 92 [2020-09-11 16:17:29,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-09-11 16:17:29,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-11 16:17:29,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-09-11 16:17:29,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-11 16:17:29,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-09-11 16:17:29,654 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-09-11 16:17:29,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:29,654 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-09-11 16:17:29,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:29,654 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-09-11 16:17:29,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:29,655 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:29,655 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:29,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-09-11 16:17:29,856 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:29,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:29,856 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-09-11 16:17:29,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:29,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851576436] [2020-09-11 16:17:29,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:30,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851576436] [2020-09-11 16:17:30,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911122362] [2020-09-11 16:17:30,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:30,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:30,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:30,156 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:30,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:30,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:30,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313287686] [2020-09-11 16:17:30,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:30,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:30,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:30,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:30,158 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-09-11 16:17:30,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:30,606 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-11 16:17:30,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:17:30,607 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:30,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:30,608 INFO L225 Difference]: With dead ends: 99 [2020-09-11 16:17:30,608 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 16:17:30,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:17:30,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 16:17:30,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-09-11 16:17:30,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 16:17:30,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-09-11 16:17:30,611 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-09-11 16:17:30,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:30,611 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-09-11 16:17:30,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:30,612 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-09-11 16:17:30,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:30,613 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:30,613 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:30,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:30,814 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:30,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:30,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-09-11 16:17:30,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:30,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870362719] [2020-09-11 16:17:30,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:31,055 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:31,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870362719] [2020-09-11 16:17:31,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364766577] [2020-09-11 16:17:31,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:31,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:31,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:31,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:31,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:31,132 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:31,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:31,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:31,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109224369] [2020-09-11 16:17:31,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:31,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:31,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:31,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:31,157 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-09-11 16:17:31,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:31,725 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-09-11 16:17:31,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:17:31,727 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:31,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:31,728 INFO L225 Difference]: With dead ends: 109 [2020-09-11 16:17:31,728 INFO L226 Difference]: Without dead ends: 103 [2020-09-11 16:17:31,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 16:17:31,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-11 16:17:31,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-09-11 16:17:31,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:17:31,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-09-11 16:17:31,731 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-09-11 16:17:31,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:31,732 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-09-11 16:17:31,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:31,732 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-09-11 16:17:31,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:31,733 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:31,733 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:31,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:31,934 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:31,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:31,934 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-09-11 16:17:31,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:31,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513923836] [2020-09-11 16:17:31,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:31,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:32,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513923836] [2020-09-11 16:17:32,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580094281] [2020-09-11 16:17:32,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:32,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 16:17:32,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:32,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:32,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:32,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:32,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:32,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976270362] [2020-09-11 16:17:32,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:32,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:32,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:32,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:32,272 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-09-11 16:17:32,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:32,785 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-09-11 16:17:32,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:17:32,786 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:32,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:32,787 INFO L225 Difference]: With dead ends: 109 [2020-09-11 16:17:32,787 INFO L226 Difference]: Without dead ends: 103 [2020-09-11 16:17:32,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:17:32,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-11 16:17:32,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-09-11 16:17:32,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-11 16:17:32,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-09-11 16:17:32,790 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-09-11 16:17:32,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:32,791 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-09-11 16:17:32,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:32,791 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-09-11 16:17:32,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:32,791 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:32,791 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:32,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-09-11 16:17:32,995 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:32,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:32,996 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-09-11 16:17:32,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:32,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675520841] [2020-09-11 16:17:32,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:33,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675520841] [2020-09-11 16:17:33,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044670528] [2020-09-11 16:17:33,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:33,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:33,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:33,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:33,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:33,310 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:33,321 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:33,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:33,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:33,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762165328] [2020-09-11 16:17:33,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:33,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:33,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:33,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:33,323 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-09-11 16:17:33,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:33,974 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-09-11 16:17:33,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:17:33,974 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:33,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:33,976 INFO L225 Difference]: With dead ends: 106 [2020-09-11 16:17:33,976 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 16:17:33,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:17:33,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 16:17:33,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-11 16:17:33,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 16:17:33,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-09-11 16:17:33,978 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-09-11 16:17:33,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:33,978 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-09-11 16:17:33,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:33,978 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-09-11 16:17:33,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:33,979 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:33,981 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:34,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-11 16:17:34,188 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:34,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:34,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-09-11 16:17:34,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:34,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627351501] [2020-09-11 16:17:34,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:34,403 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:34,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627351501] [2020-09-11 16:17:34,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800203913] [2020-09-11 16:17:34,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:34,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 16:17:34,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:34,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:34,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:34,484 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:34,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:34,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:34,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846934150] [2020-09-11 16:17:34,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:34,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:34,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:34,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:34,486 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-09-11 16:17:35,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:35,066 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-09-11 16:17:35,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:17:35,067 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:35,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:35,067 INFO L225 Difference]: With dead ends: 107 [2020-09-11 16:17:35,068 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 16:17:35,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 16:17:35,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 16:17:35,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-11 16:17:35,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-11 16:17:35,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-09-11 16:17:35,070 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-09-11 16:17:35,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:35,070 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-09-11 16:17:35,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:35,070 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-09-11 16:17:35,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:35,070 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:35,070 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:35,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:35,272 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:35,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:35,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-09-11 16:17:35,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:35,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817195254] [2020-09-11 16:17:35,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:35,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817195254] [2020-09-11 16:17:35,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616035573] [2020-09-11 16:17:35,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:35,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 16:17:35,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:35,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:35,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:35,568 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:35,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:35,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:35,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066482490] [2020-09-11 16:17:35,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:35,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:35,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:35,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:35,585 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-09-11 16:17:36,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:36,224 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-09-11 16:17:36,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:17:36,224 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:36,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:36,225 INFO L225 Difference]: With dead ends: 104 [2020-09-11 16:17:36,225 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 16:17:36,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 16:17:36,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 16:17:36,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-09-11 16:17:36,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 16:17:36,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-09-11 16:17:36,228 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-09-11 16:17:36,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:36,229 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-09-11 16:17:36,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:36,229 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-09-11 16:17:36,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:36,229 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:36,230 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:36,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-11 16:17:36,433 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:36,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:36,434 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-09-11 16:17:36,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:36,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887762459] [2020-09-11 16:17:36,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:36,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:36,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887762459] [2020-09-11 16:17:36,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836618949] [2020-09-11 16:17:36,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:36,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:36,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:36,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:36,712 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:36,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:36,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:36,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179944395] [2020-09-11 16:17:36,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:36,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:36,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:36,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:36,714 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-09-11 16:17:37,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:37,351 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-09-11 16:17:37,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:17:37,352 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:37,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:37,353 INFO L225 Difference]: With dead ends: 105 [2020-09-11 16:17:37,353 INFO L226 Difference]: Without dead ends: 99 [2020-09-11 16:17:37,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 16:17:37,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-11 16:17:37,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-09-11 16:17:37,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:17:37,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 16:17:37,357 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-09-11 16:17:37,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:37,357 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 16:17:37,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:37,358 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 16:17:37,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:37,358 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:37,358 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:37,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:37,562 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:37,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:37,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-09-11 16:17:37,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:37,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825700100] [2020-09-11 16:17:37,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:37,767 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:37,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825700100] [2020-09-11 16:17:37,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059320078] [2020-09-11 16:17:37,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:37,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:37,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:37,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:37,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:37,848 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:37,861 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:37,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:37,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:37,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830239070] [2020-09-11 16:17:37,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:37,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:37,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:37,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:37,862 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-09-11 16:17:38,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:38,646 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-09-11 16:17:38,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:17:38,647 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:38,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:38,648 INFO L225 Difference]: With dead ends: 102 [2020-09-11 16:17:38,648 INFO L226 Difference]: Without dead ends: 96 [2020-09-11 16:17:38,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 16:17:38,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-11 16:17:38,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-09-11 16:17:38,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:17:38,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 16:17:38,650 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-09-11 16:17:38,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:38,650 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 16:17:38,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:38,651 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 16:17:38,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:38,651 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:38,651 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:38,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-09-11 16:17:38,852 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:38,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:38,853 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-09-11 16:17:38,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:38,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225652960] [2020-09-11 16:17:38,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:38,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:39,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225652960] [2020-09-11 16:17:39,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767960551] [2020-09-11 16:17:39,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:39,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 16:17:39,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:39,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:39,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:39,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:39,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:39,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451846308] [2020-09-11 16:17:39,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:39,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:39,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:39,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:39,125 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-09-11 16:17:39,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:39,820 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-09-11 16:17:39,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:17:39,821 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:39,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:39,822 INFO L225 Difference]: With dead ends: 103 [2020-09-11 16:17:39,822 INFO L226 Difference]: Without dead ends: 97 [2020-09-11 16:17:39,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 16:17:39,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-11 16:17:39,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-09-11 16:17:39,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-11 16:17:39,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-09-11 16:17:39,824 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-09-11 16:17:39,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:39,825 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-09-11 16:17:39,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:39,825 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-09-11 16:17:39,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:39,825 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:39,825 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:40,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:40,031 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:40,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:40,031 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-09-11 16:17:40,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:40,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592837622] [2020-09-11 16:17:40,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:40,216 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:40,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592837622] [2020-09-11 16:17:40,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538185235] [2020-09-11 16:17:40,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:40,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:40,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:40,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:40,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:40,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:40,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:40,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:40,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510479997] [2020-09-11 16:17:40,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:40,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:40,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:40,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:40,352 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-09-11 16:17:41,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:41,416 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-09-11 16:17:41,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:17:41,417 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:41,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:41,418 INFO L225 Difference]: With dead ends: 100 [2020-09-11 16:17:41,418 INFO L226 Difference]: Without dead ends: 94 [2020-09-11 16:17:41,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:17:41,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-11 16:17:41,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-09-11 16:17:41,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 16:17:41,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-11 16:17:41,420 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-09-11 16:17:41,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:41,421 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-11 16:17:41,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:41,421 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-11 16:17:41,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:41,421 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:41,421 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:41,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-11 16:17:41,629 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:41,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:41,629 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-09-11 16:17:41,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:41,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370525183] [2020-09-11 16:17:41,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:41,808 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:41,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370525183] [2020-09-11 16:17:41,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125703329] [2020-09-11 16:17:41,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:41,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 16:17:41,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:41,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:41,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:41,895 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:41,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:41,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:41,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219054491] [2020-09-11 16:17:41,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:41,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:41,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:41,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:41,897 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-09-11 16:17:42,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:42,693 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-11 16:17:42,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:17:42,694 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:42,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:42,695 INFO L225 Difference]: With dead ends: 120 [2020-09-11 16:17:42,695 INFO L226 Difference]: Without dead ends: 114 [2020-09-11 16:17:42,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 16:17:42,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-11 16:17:42,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-09-11 16:17:42,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 16:17:42,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-09-11 16:17:42,702 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-09-11 16:17:42,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:42,703 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-09-11 16:17:42,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:42,704 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-09-11 16:17:42,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:42,704 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:42,705 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:42,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-09-11 16:17:42,906 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:42,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:42,906 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-09-11 16:17:42,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:42,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524016352] [2020-09-11 16:17:42,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:43,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524016352] [2020-09-11 16:17:43,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078681772] [2020-09-11 16:17:43,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:43,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 16:17:43,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:43,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:43,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:43,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:43,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:43,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777247128] [2020-09-11 16:17:43,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:43,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:43,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:43,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:43,216 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-09-11 16:17:44,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:44,096 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-09-11 16:17:44,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:17:44,097 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:44,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:44,098 INFO L225 Difference]: With dead ends: 101 [2020-09-11 16:17:44,098 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 16:17:44,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=575, Invalid=1405, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 16:17:44,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 16:17:44,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-09-11 16:17:44,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-11 16:17:44,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-09-11 16:17:44,101 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-09-11 16:17:44,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:44,101 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-09-11 16:17:44,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:44,101 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-09-11 16:17:44,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:44,102 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:44,102 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:44,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:44,304 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:44,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:44,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-09-11 16:17:44,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:44,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558094608] [2020-09-11 16:17:44,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:44,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558094608] [2020-09-11 16:17:44,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802906183] [2020-09-11 16:17:44,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:44,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:44,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:44,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:44,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:17:44,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062051081] [2020-09-11 16:17:44,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:44,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:44,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:44,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:44,619 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-09-11 16:17:45,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:45,084 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-09-11 16:17:45,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:17:45,085 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:17:45,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:45,087 INFO L225 Difference]: With dead ends: 114 [2020-09-11 16:17:45,087 INFO L226 Difference]: Without dead ends: 108 [2020-09-11 16:17:45,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:17:45,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-11 16:17:45,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-09-11 16:17:45,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:17:45,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:17:45,090 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 16:17:45,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:45,091 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:17:45,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:45,091 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:17:45,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:45,091 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:45,091 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:45,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:45,293 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:45,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:45,294 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-09-11 16:17:45,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:45,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958906993] [2020-09-11 16:17:45,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:45,567 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:45,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958906993] [2020-09-11 16:17:45,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833619848] [2020-09-11 16:17:45,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:45,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:45,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:45,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:45,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:45,650 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:45,668 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:45,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:45,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:17:45,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657365251] [2020-09-11 16:17:45,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:17:45,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:45,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:17:45,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:17:45,669 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 16:17:46,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:46,203 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-09-11 16:17:46,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:17:46,204 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:17:46,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:46,204 INFO L225 Difference]: With dead ends: 111 [2020-09-11 16:17:46,205 INFO L226 Difference]: Without dead ends: 105 [2020-09-11 16:17:46,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:17:46,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-11 16:17:46,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-09-11 16:17:46,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:17:46,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:17:46,207 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 16:17:46,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:46,207 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:17:46,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:17:46,207 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:17:46,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:46,207 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:46,208 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:46,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-11 16:17:46,408 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:46,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:46,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-09-11 16:17:46,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:46,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657249524] [2020-09-11 16:17:46,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:46,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:46,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657249524] [2020-09-11 16:17:46,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396299410] [2020-09-11 16:17:46,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:46,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 16:17:46,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:46,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:46,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:46,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:46,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:17:46,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868529561] [2020-09-11 16:17:46,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:46,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:46,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:46,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:46,747 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 16:17:47,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:47,251 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-11 16:17:47,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:17:47,252 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:17:47,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:47,253 INFO L225 Difference]: With dead ends: 108 [2020-09-11 16:17:47,253 INFO L226 Difference]: Without dead ends: 102 [2020-09-11 16:17:47,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 16:17:47,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-11 16:17:47,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-09-11 16:17:47,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:17:47,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:17:47,256 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 16:17:47,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:47,256 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:17:47,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:47,256 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:17:47,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:47,257 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:47,257 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:47,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:47,464 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:47,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:47,465 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-09-11 16:17:47,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:47,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271374866] [2020-09-11 16:17:47,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:47,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271374866] [2020-09-11 16:17:47,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366290329] [2020-09-11 16:17:47,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:47,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:47,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:47,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:47,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:47,811 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:47,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:47,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:17:47,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317738620] [2020-09-11 16:17:47,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:17:47,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:47,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:17:47,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:17:47,836 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 16:17:48,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:48,440 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-09-11 16:17:48,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:17:48,441 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:17:48,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:48,442 INFO L225 Difference]: With dead ends: 107 [2020-09-11 16:17:48,442 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 16:17:48,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 16:17:48,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 16:17:48,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-09-11 16:17:48,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:17:48,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:17:48,445 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 16:17:48,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:48,446 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:17:48,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:17:48,446 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:17:48,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:48,446 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:48,446 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:48,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-09-11 16:17:48,647 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:48,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:48,648 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-09-11 16:17:48,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:48,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272638100] [2020-09-11 16:17:48,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:48,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:48,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272638100] [2020-09-11 16:17:48,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878748462] [2020-09-11 16:17:48,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:48,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 16:17:48,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:48,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:48,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:48,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:48,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:17:48,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596455662] [2020-09-11 16:17:48,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:48,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:48,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:48,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:48,957 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 16:17:49,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:49,536 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-11 16:17:49,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:17:49,537 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:17:49,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:49,538 INFO L225 Difference]: With dead ends: 104 [2020-09-11 16:17:49,538 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 16:17:49,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:17:49,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 16:17:49,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-09-11 16:17:49,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:17:49,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:17:49,542 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 16:17:49,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:49,542 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:17:49,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:49,542 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:17:49,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:49,542 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:49,543 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:49,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-11 16:17:49,750 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:49,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:49,751 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-09-11 16:17:49,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:49,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222091125] [2020-09-11 16:17:49,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:49,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222091125] [2020-09-11 16:17:49,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880123727] [2020-09-11 16:17:49,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:50,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 16:17:50,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:50,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:50,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:50,083 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:50,097 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:50,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:50,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:17:50,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49535612] [2020-09-11 16:17:50,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:17:50,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:50,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:17:50,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:17:50,099 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 16:17:50,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:50,837 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-09-11 16:17:50,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:17:50,838 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:17:50,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:50,839 INFO L225 Difference]: With dead ends: 103 [2020-09-11 16:17:50,839 INFO L226 Difference]: Without dead ends: 97 [2020-09-11 16:17:50,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 16:17:50,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-11 16:17:50,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-09-11 16:17:50,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:17:50,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:17:50,851 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 16:17:50,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:50,851 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:17:50,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:17:50,852 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:17:50,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:50,852 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:50,852 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:51,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-09-11 16:17:51,053 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:51,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:51,054 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-09-11 16:17:51,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:51,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686326819] [2020-09-11 16:17:51,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:51,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:51,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686326819] [2020-09-11 16:17:51,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204910886] [2020-09-11 16:17:51,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:51,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:51,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:51,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:51,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:51,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:17:51,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605463076] [2020-09-11 16:17:51,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:51,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:51,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:51,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:51,355 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 16:17:52,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:52,002 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-09-11 16:17:52,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:17:52,003 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:17:52,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:52,004 INFO L225 Difference]: With dead ends: 100 [2020-09-11 16:17:52,004 INFO L226 Difference]: Without dead ends: 94 [2020-09-11 16:17:52,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 16:17:52,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-11 16:17:52,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-09-11 16:17:52,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:17:52,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:17:52,007 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 16:17:52,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:52,007 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:17:52,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:52,007 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:17:52,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:52,008 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:52,008 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:52,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:52,212 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:52,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:52,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-09-11 16:17:52,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:52,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831546459] [2020-09-11 16:17:52,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:52,416 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:52,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831546459] [2020-09-11 16:17:52,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836686133] [2020-09-11 16:17:52,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:52,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:52,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:52,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:52,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:52,502 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:52,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:52,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:17:52,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249189099] [2020-09-11 16:17:52,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:17:52,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:52,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:17:52,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:17:52,519 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 16:17:53,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:53,344 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-09-11 16:17:53,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:17:53,345 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:17:53,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:53,346 INFO L225 Difference]: With dead ends: 99 [2020-09-11 16:17:53,346 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 16:17:53,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 16:17:53,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 16:17:53,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-09-11 16:17:53,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:17:53,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:17:53,348 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 16:17:53,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:53,348 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:17:53,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:17:53,348 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:17:53,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:53,348 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:53,348 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:53,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-09-11 16:17:53,549 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:53,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:53,550 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-09-11 16:17:53,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:53,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262760493] [2020-09-11 16:17:53,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:53,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:53,769 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:53,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262760493] [2020-09-11 16:17:53,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159651006] [2020-09-11 16:17:53,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:53,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 16:17:53,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:53,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:53,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:53,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:53,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:17:53,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346636147] [2020-09-11 16:17:53,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:53,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:53,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:53,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:53,850 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 16:17:54,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:54,551 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-09-11 16:17:54,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:17:54,552 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:17:54,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:54,552 INFO L225 Difference]: With dead ends: 96 [2020-09-11 16:17:54,552 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 16:17:54,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 16:17:54,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 16:17:54,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-09-11 16:17:54,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:17:54,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:17:54,555 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 16:17:54,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:54,555 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:17:54,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:54,556 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:17:54,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:54,556 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:54,556 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:54,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:54,757 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:54,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:54,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-09-11 16:17:54,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:54,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384085970] [2020-09-11 16:17:54,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:54,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384085970] [2020-09-11 16:17:54,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136519906] [2020-09-11 16:17:54,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:55,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:55,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:55,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:55,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:55,072 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:55,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:55,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:17:55,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311786702] [2020-09-11 16:17:55,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:17:55,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:55,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:17:55,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:17:55,088 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 16:17:56,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:56,028 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-11 16:17:56,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:17:56,029 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:17:56,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:56,029 INFO L225 Difference]: With dead ends: 95 [2020-09-11 16:17:56,030 INFO L226 Difference]: Without dead ends: 89 [2020-09-11 16:17:56,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 16:17:56,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-11 16:17:56,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-09-11 16:17:56,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:17:56,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:17:56,032 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 16:17:56,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:56,032 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:17:56,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:17:56,032 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:17:56,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:56,032 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:56,033 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:56,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:56,234 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:56,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:56,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-09-11 16:17:56,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:56,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516715819] [2020-09-11 16:17:56,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:56,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:56,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516715819] [2020-09-11 16:17:56,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581252599] [2020-09-11 16:17:56,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:56,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 16:17:56,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:56,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:56,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:56,549 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:56,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:56,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:17:56,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266899273] [2020-09-11 16:17:56,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:56,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:56,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:56,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:56,551 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 16:17:57,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:57,351 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-11 16:17:57,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:17:57,351 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:17:57,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:57,352 INFO L225 Difference]: With dead ends: 92 [2020-09-11 16:17:57,352 INFO L226 Difference]: Without dead ends: 86 [2020-09-11 16:17:57,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:17:57,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-11 16:17:57,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-09-11 16:17:57,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:17:57,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:17:57,354 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 16:17:57,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:57,355 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:17:57,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:57,355 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:17:57,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:57,355 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:57,357 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:57,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:57,565 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:57,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:57,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-09-11 16:17:57,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:57,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421147931] [2020-09-11 16:17:57,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:57,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421147931] [2020-09-11 16:17:57,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429858744] [2020-09-11 16:17:57,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:57,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 16:17:57,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:57,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:57,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:57,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:57,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:57,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:17:57,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987061389] [2020-09-11 16:17:57,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:17:57,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:57,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:17:57,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:17:57,860 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 16:17:58,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:58,878 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-09-11 16:17:58,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:17:58,879 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:17:58,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:58,880 INFO L225 Difference]: With dead ends: 91 [2020-09-11 16:17:58,880 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 16:17:58,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 16:17:58,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 16:17:58,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-09-11 16:17:58,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:17:58,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:17:58,883 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 16:17:58,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:58,884 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:17:58,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:17:58,884 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:17:58,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:58,885 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:58,885 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:59,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:59,094 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:59,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:59,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-09-11 16:17:59,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:59,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493125012] [2020-09-11 16:17:59,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:59,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:59,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493125012] [2020-09-11 16:17:59,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143781267] [2020-09-11 16:17:59,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:59,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:59,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:59,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:59,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:17:59,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207363566] [2020-09-11 16:17:59,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:59,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:59,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:59,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:59,414 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 16:18:00,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:00,232 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-11 16:18:00,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:18:00,232 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:18:00,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:00,233 INFO L225 Difference]: With dead ends: 107 [2020-09-11 16:18:00,233 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 16:18:00,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 16:18:00,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 16:18:00,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-09-11 16:18:00,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-11 16:18:00,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-09-11 16:18:00,235 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-09-11 16:18:00,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:00,235 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-09-11 16:18:00,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:18:00,235 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-09-11 16:18:00,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:18:00,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:00,236 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:00,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-09-11 16:18:00,440 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:00,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:00,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-09-11 16:18:00,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:00,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798212508] [2020-09-11 16:18:00,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:00,658 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:00,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798212508] [2020-09-11 16:18:00,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018483719] [2020-09-11 16:18:00,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:00,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:00,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:00,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:18:00,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:00,744 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:00,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:00,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:18:00,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513188222] [2020-09-11 16:18:00,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:00,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:00,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:00,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:00,762 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-09-11 16:18:01,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:01,818 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-09-11 16:18:01,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 16:18:01,819 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:18:01,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:01,820 INFO L225 Difference]: With dead ends: 88 [2020-09-11 16:18:01,820 INFO L226 Difference]: Without dead ends: 80 [2020-09-11 16:18:01,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 16:18:01,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-11 16:18:01,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-09-11 16:18:01,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 16:18:01,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-09-11 16:18:01,823 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-09-11 16:18:01,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:01,823 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-09-11 16:18:01,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:01,823 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-09-11 16:18:01,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:18:01,824 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:01,824 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:02,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-09-11 16:18:02,025 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:02,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:02,025 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-09-11 16:18:02,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:02,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007899082] [2020-09-11 16:18:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:02,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:02,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007899082] [2020-09-11 16:18:02,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738426995] [2020-09-11 16:18:02,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:02,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 16:18:02,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:02,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:18:02,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:02,317 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:18:02,338 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:02,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:02,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:18:02,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500598727] [2020-09-11 16:18:02,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:02,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:02,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:02,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:02,340 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-09-11 16:18:03,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:03,324 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-09-11 16:18:03,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:18:03,324 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:18:03,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:03,325 INFO L225 Difference]: With dead ends: 100 [2020-09-11 16:18:03,325 INFO L226 Difference]: Without dead ends: 95 [2020-09-11 16:18:03,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 16:18:03,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-11 16:18:03,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-09-11 16:18:03,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 16:18:03,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-11 16:18:03,328 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-09-11 16:18:03,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:03,328 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-11 16:18:03,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:03,328 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-11 16:18:03,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:03,329 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:03,329 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:03,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-11 16:18:03,535 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:03,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:03,536 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-09-11 16:18:03,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:03,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74181847] [2020-09-11 16:18:03,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:03,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74181847] [2020-09-11 16:18:03,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506444990] [2020-09-11 16:18:03,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:03,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:18:03,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:03,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:03,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:03,866 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:18:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:03,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:03,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:03,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502408228] [2020-09-11 16:18:03,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:03,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:03,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:03,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:03,888 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-09-11 16:18:04,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:04,961 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-09-11 16:18:04,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:18:04,962 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:04,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:04,963 INFO L225 Difference]: With dead ends: 84 [2020-09-11 16:18:04,963 INFO L226 Difference]: Without dead ends: 79 [2020-09-11 16:18:04,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 16:18:04,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-11 16:18:04,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-09-11 16:18:04,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 16:18:04,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-09-11 16:18:04,966 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-09-11 16:18:04,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:04,966 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-09-11 16:18:04,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:04,966 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-09-11 16:18:04,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:04,967 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:04,967 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:05,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-11 16:18:05,168 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:05,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:05,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-09-11 16:18:05,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:05,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515547851] [2020-09-11 16:18:05,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:05,466 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:05,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515547851] [2020-09-11 16:18:05,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73421396] [2020-09-11 16:18:05,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:05,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 16:18:05,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:05,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:05,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:05,540 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:05,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:05,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:05,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054098738] [2020-09-11 16:18:05,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:05,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:05,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:05,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:05,541 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-09-11 16:18:05,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:05,999 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-09-11 16:18:06,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:18:06,000 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:06,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:06,001 INFO L225 Difference]: With dead ends: 90 [2020-09-11 16:18:06,001 INFO L226 Difference]: Without dead ends: 84 [2020-09-11 16:18:06,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 16:18:06,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-11 16:18:06,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-09-11 16:18:06,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 16:18:06,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-09-11 16:18:06,003 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-09-11 16:18:06,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:06,004 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-09-11 16:18:06,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:06,004 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-09-11 16:18:06,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:06,004 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:06,004 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:06,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:06,206 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:06,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:06,207 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-09-11 16:18:06,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:06,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359028949] [2020-09-11 16:18:06,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:06,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:06,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359028949] [2020-09-11 16:18:06,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327876587] [2020-09-11 16:18:06,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:06,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 16:18:06,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:06,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:06,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:06,614 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:06,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:06,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:06,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376824845] [2020-09-11 16:18:06,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:06,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:06,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:06,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:06,627 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-09-11 16:18:07,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:07,152 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-09-11 16:18:07,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:18:07,152 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:07,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:07,153 INFO L225 Difference]: With dead ends: 106 [2020-09-11 16:18:07,153 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 16:18:07,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:18:07,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 16:18:07,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-11 16:18:07,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 16:18:07,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-09-11 16:18:07,156 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-09-11 16:18:07,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:07,156 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-09-11 16:18:07,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:07,156 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-09-11 16:18:07,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:07,156 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:07,157 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:07,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-09-11 16:18:07,359 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:07,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:07,359 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-09-11 16:18:07,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:07,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500155411] [2020-09-11 16:18:07,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:07,654 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:07,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500155411] [2020-09-11 16:18:07,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250777883] [2020-09-11 16:18:07,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:07,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:07,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:07,738 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:07,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:07,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:07,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113722992] [2020-09-11 16:18:07,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:07,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:07,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:07,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:07,740 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-09-11 16:18:08,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:08,325 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-09-11 16:18:08,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:18:08,325 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:08,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:08,326 INFO L225 Difference]: With dead ends: 107 [2020-09-11 16:18:08,326 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 16:18:08,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:18:08,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 16:18:08,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-11 16:18:08,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-11 16:18:08,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-09-11 16:18:08,329 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-09-11 16:18:08,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:08,330 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-09-11 16:18:08,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:08,330 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-09-11 16:18:08,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:08,330 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:08,330 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:08,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-09-11 16:18:08,541 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:08,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:08,541 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-09-11 16:18:08,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:08,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872956552] [2020-09-11 16:18:08,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:08,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872956552] [2020-09-11 16:18:08,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307287356] [2020-09-11 16:18:08,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:08,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:08,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:08,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:08,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:08,927 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:08,941 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:08,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:08,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:08,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467427138] [2020-09-11 16:18:08,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:08,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:08,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:08,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:08,943 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-09-11 16:18:09,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:09,563 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-09-11 16:18:09,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:18:09,564 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:09,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:09,565 INFO L225 Difference]: With dead ends: 119 [2020-09-11 16:18:09,565 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 16:18:09,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 16:18:09,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 16:18:09,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-09-11 16:18:09,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 16:18:09,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-09-11 16:18:09,567 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-09-11 16:18:09,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:09,567 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-09-11 16:18:09,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:09,568 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-09-11 16:18:09,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:09,568 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:09,568 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:09,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-09-11 16:18:09,769 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:09,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:09,769 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-09-11 16:18:09,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:09,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623522380] [2020-09-11 16:18:09,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:10,045 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:10,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623522380] [2020-09-11 16:18:10,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59094886] [2020-09-11 16:18:10,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:10,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 16:18:10,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:10,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:10,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:10,132 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:10,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:10,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:10,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210502954] [2020-09-11 16:18:10,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:10,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:10,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:10,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:10,135 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-09-11 16:18:10,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:10,750 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-09-11 16:18:10,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:18:10,751 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:10,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:10,752 INFO L225 Difference]: With dead ends: 119 [2020-09-11 16:18:10,752 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 16:18:10,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 16:18:10,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 16:18:10,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-09-11 16:18:10,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:18:10,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-09-11 16:18:10,755 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-09-11 16:18:10,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:10,756 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-09-11 16:18:10,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:10,756 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-09-11 16:18:10,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:10,756 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:10,756 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:10,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:10,959 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:10,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:10,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-09-11 16:18:10,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:10,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954281714] [2020-09-11 16:18:10,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:10,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:11,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954281714] [2020-09-11 16:18:11,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359604211] [2020-09-11 16:18:11,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:11,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:18:11,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:11,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:11,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:11,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:11,347 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:11,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:11,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:11,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015078024] [2020-09-11 16:18:11,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:11,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:11,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:11,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:11,348 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-09-11 16:18:12,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:12,066 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-09-11 16:18:12,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:18:12,067 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:12,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:12,068 INFO L225 Difference]: With dead ends: 116 [2020-09-11 16:18:12,068 INFO L226 Difference]: Without dead ends: 110 [2020-09-11 16:18:12,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 16:18:12,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-11 16:18:12,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-09-11 16:18:12,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:18:12,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-09-11 16:18:12,071 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-09-11 16:18:12,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:12,071 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-09-11 16:18:12,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:12,071 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-09-11 16:18:12,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:12,071 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:12,071 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:12,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:12,272 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:12,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:12,273 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-09-11 16:18:12,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:12,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240933522] [2020-09-11 16:18:12,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:12,506 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:12,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240933522] [2020-09-11 16:18:12,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019903568] [2020-09-11 16:18:12,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:12,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 16:18:12,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:12,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:12,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:12,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:12,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:12,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021493499] [2020-09-11 16:18:12,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:12,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:12,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:12,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:12,599 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-09-11 16:18:13,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:13,286 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-09-11 16:18:13,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:18:13,287 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:13,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:13,287 INFO L225 Difference]: With dead ends: 117 [2020-09-11 16:18:13,287 INFO L226 Difference]: Without dead ends: 111 [2020-09-11 16:18:13,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 16:18:13,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-11 16:18:13,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-09-11 16:18:13,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-11 16:18:13,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-09-11 16:18:13,290 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-09-11 16:18:13,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:13,290 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-09-11 16:18:13,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:13,290 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-09-11 16:18:13,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:13,291 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:13,291 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:13,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:13,492 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:13,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:13,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-09-11 16:18:13,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:13,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620770425] [2020-09-11 16:18:13,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:13,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620770425] [2020-09-11 16:18:13,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744125548] [2020-09-11 16:18:13,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:13,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 16:18:13,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:13,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:13,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:13,863 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:13,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:13,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:13,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216398414] [2020-09-11 16:18:13,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:13,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:13,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:13,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:13,878 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-09-11 16:18:14,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:14,644 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-09-11 16:18:14,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:18:14,645 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:14,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:14,645 INFO L225 Difference]: With dead ends: 114 [2020-09-11 16:18:14,646 INFO L226 Difference]: Without dead ends: 108 [2020-09-11 16:18:14,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:18:14,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-11 16:18:14,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-09-11 16:18:14,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 16:18:14,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-09-11 16:18:14,648 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-09-11 16:18:14,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:14,649 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-09-11 16:18:14,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:14,649 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-09-11 16:18:14,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:14,649 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:14,649 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:14,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-11 16:18:14,858 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:14,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:14,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-09-11 16:18:14,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:14,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107418840] [2020-09-11 16:18:14,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:15,122 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:15,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107418840] [2020-09-11 16:18:15,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440909043] [2020-09-11 16:18:15,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:15,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:15,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:15,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:15,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:15,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:15,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683743636] [2020-09-11 16:18:15,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:15,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:15,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:15,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:15,202 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-09-11 16:18:15,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:15,973 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-09-11 16:18:15,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:18:15,974 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:15,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:15,974 INFO L225 Difference]: With dead ends: 115 [2020-09-11 16:18:15,974 INFO L226 Difference]: Without dead ends: 109 [2020-09-11 16:18:15,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 16:18:15,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-11 16:18:15,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-09-11 16:18:15,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-11 16:18:15,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-09-11 16:18:15,977 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-09-11 16:18:15,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:15,978 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-09-11 16:18:15,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:15,978 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-09-11 16:18:15,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:15,978 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:15,978 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:16,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:16,180 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:16,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:16,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-09-11 16:18:16,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:16,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087467716] [2020-09-11 16:18:16,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:16,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087467716] [2020-09-11 16:18:16,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013613722] [2020-09-11 16:18:16,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:16,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:16,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:16,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:16,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:16,529 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:16,545 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:16,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:16,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:16,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790133159] [2020-09-11 16:18:16,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:16,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:16,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:16,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:16,546 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-09-11 16:18:17,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:17,458 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-09-11 16:18:17,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:18:17,459 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:17,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:17,460 INFO L225 Difference]: With dead ends: 112 [2020-09-11 16:18:17,460 INFO L226 Difference]: Without dead ends: 106 [2020-09-11 16:18:17,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 16:18:17,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-11 16:18:17,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-09-11 16:18:17,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-11 16:18:17,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-09-11 16:18:17,462 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-09-11 16:18:17,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:17,462 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-09-11 16:18:17,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:17,463 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-09-11 16:18:17,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:17,463 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:17,463 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:17,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-11 16:18:17,664 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:17,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:17,664 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-09-11 16:18:17,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:17,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616058108] [2020-09-11 16:18:17,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:17,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616058108] [2020-09-11 16:18:17,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916877139] [2020-09-11 16:18:17,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:17,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 16:18:17,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:17,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:17,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:17,994 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:17,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:17,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:17,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057160463] [2020-09-11 16:18:17,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:17,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:17,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:17,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:17,996 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-09-11 16:18:18,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:18,814 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-09-11 16:18:18,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:18:18,815 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:18,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:18,816 INFO L225 Difference]: With dead ends: 113 [2020-09-11 16:18:18,816 INFO L226 Difference]: Without dead ends: 107 [2020-09-11 16:18:18,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 16:18:18,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-11 16:18:18,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-09-11 16:18:18,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:18:18,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:18:18,818 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-09-11 16:18:18,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:18,818 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:18:18,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:18,818 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:18:18,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:18,818 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:18,818 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:19,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-11 16:18:19,024 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:19,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:19,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-09-11 16:18:19,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:19,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137661006] [2020-09-11 16:18:19,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:19,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137661006] [2020-09-11 16:18:19,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143294841] [2020-09-11 16:18:19,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:19,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:18:19,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:19,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:19,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:19,370 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:19,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:19,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:19,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781007048] [2020-09-11 16:18:19,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:19,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:19,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:19,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:19,393 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-09-11 16:18:20,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:20,409 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-09-11 16:18:20,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:18:20,410 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:20,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:20,411 INFO L225 Difference]: With dead ends: 110 [2020-09-11 16:18:20,411 INFO L226 Difference]: Without dead ends: 104 [2020-09-11 16:18:20,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-09-11 16:18:20,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-11 16:18:20,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-09-11 16:18:20,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:18:20,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:18:20,414 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-09-11 16:18:20,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:20,414 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:18:20,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:20,414 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:18:20,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:20,414 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:20,414 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:20,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-09-11 16:18:20,615 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:20,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:20,616 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-09-11 16:18:20,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:20,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83512359] [2020-09-11 16:18:20,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:20,859 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:20,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83512359] [2020-09-11 16:18:20,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550421693] [2020-09-11 16:18:20,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:20,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 16:18:20,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:20,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:20,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:20,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:20,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:20,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351150785] [2020-09-11 16:18:20,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:20,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:20,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:20,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:20,948 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-09-11 16:18:21,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:21,875 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-09-11 16:18:21,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-11 16:18:21,876 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:21,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:21,876 INFO L225 Difference]: With dead ends: 111 [2020-09-11 16:18:21,877 INFO L226 Difference]: Without dead ends: 105 [2020-09-11 16:18:21,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 16:18:21,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-11 16:18:21,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-09-11 16:18:21,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-11 16:18:21,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-09-11 16:18:21,878 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-09-11 16:18:21,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:21,879 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-09-11 16:18:21,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:21,879 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-09-11 16:18:21,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:21,879 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:21,879 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:22,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:22,080 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:22,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:22,081 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-09-11 16:18:22,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:22,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450132594] [2020-09-11 16:18:22,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:22,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450132594] [2020-09-11 16:18:22,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168861573] [2020-09-11 16:18:22,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:22,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 16:18:22,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:22,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:22,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:22,410 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:22,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:22,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:22,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311180040] [2020-09-11 16:18:22,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:22,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:22,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:22,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:22,431 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-09-11 16:18:23,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:23,541 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-09-11 16:18:23,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 16:18:23,542 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:23,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:23,542 INFO L225 Difference]: With dead ends: 108 [2020-09-11 16:18:23,542 INFO L226 Difference]: Without dead ends: 102 [2020-09-11 16:18:23,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 16:18:23,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-11 16:18:23,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-09-11 16:18:23,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 16:18:23,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-11 16:18:23,545 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-09-11 16:18:23,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:23,546 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-11 16:18:23,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:23,546 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-11 16:18:23,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:23,546 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:23,546 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:23,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-11 16:18:23,747 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:23,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:23,748 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-09-11 16:18:23,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:23,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495981039] [2020-09-11 16:18:23,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:23,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:23,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495981039] [2020-09-11 16:18:23,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176925039] [2020-09-11 16:18:23,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:24,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:24,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:24,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:24,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:24,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:24,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137789041] [2020-09-11 16:18:24,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:24,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:24,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:24,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:24,074 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-09-11 16:18:25,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:25,020 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-09-11 16:18:25,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 16:18:25,021 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:25,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:25,021 INFO L225 Difference]: With dead ends: 128 [2020-09-11 16:18:25,021 INFO L226 Difference]: Without dead ends: 122 [2020-09-11 16:18:25,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-09-11 16:18:25,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-11 16:18:25,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-09-11 16:18:25,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 16:18:25,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-09-11 16:18:25,024 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-09-11 16:18:25,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:25,024 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-09-11 16:18:25,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:25,024 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-09-11 16:18:25,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:25,025 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:25,025 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:25,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:25,232 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:25,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:25,233 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-09-11 16:18:25,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:25,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478624229] [2020-09-11 16:18:25,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:25,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478624229] [2020-09-11 16:18:25,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024592132] [2020-09-11 16:18:25,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:25,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:25,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:25,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:25,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:25,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:25,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:25,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422116618] [2020-09-11 16:18:25,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:25,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:25,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:25,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:25,586 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-09-11 16:18:26,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:26,702 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-09-11 16:18:26,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 16:18:26,703 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:26,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:26,703 INFO L225 Difference]: With dead ends: 109 [2020-09-11 16:18:26,703 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 16:18:26,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=733, Invalid=1817, Unknown=0, NotChecked=0, Total=2550 [2020-09-11 16:18:26,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 16:18:26,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-09-11 16:18:26,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-11 16:18:26,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-09-11 16:18:26,710 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-09-11 16:18:26,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:26,710 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-09-11 16:18:26,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:26,710 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-09-11 16:18:26,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:26,711 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:26,711 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:26,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:26,912 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:26,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:26,912 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-09-11 16:18:26,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:26,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566521442] [2020-09-11 16:18:26,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:27,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566521442] [2020-09-11 16:18:27,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668806644] [2020-09-11 16:18:27,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:27,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 16:18:27,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:27,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:27,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:27,328 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:27,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:27,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:27,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966991471] [2020-09-11 16:18:27,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:27,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:27,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:27,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:27,330 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-09-11 16:18:27,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:27,878 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-09-11 16:18:27,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:18:27,879 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:27,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:27,880 INFO L225 Difference]: With dead ends: 124 [2020-09-11 16:18:27,880 INFO L226 Difference]: Without dead ends: 118 [2020-09-11 16:18:27,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:18:27,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-11 16:18:27,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-09-11 16:18:27,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:27,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:27,882 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:27,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:27,882 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:27,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:27,883 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:27,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:27,883 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:27,883 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:28,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:28,091 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:28,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:28,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-09-11 16:18:28,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:28,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545713388] [2020-09-11 16:18:28,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:28,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545713388] [2020-09-11 16:18:28,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005113215] [2020-09-11 16:18:28,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:28,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:18:28,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:28,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:28,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:28,523 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:28,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:28,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:28,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642889342] [2020-09-11 16:18:28,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:28,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:28,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:28,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:28,536 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:29,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:29,197 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-11 16:18:29,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:18:29,198 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:29,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:29,199 INFO L225 Difference]: With dead ends: 121 [2020-09-11 16:18:29,199 INFO L226 Difference]: Without dead ends: 115 [2020-09-11 16:18:29,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 16:18:29,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-11 16:18:29,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-09-11 16:18:29,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:29,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:29,201 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:29,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:29,202 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:29,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:29,202 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:29,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:29,202 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:29,203 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:29,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:29,403 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:29,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:29,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-09-11 16:18:29,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:29,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349387002] [2020-09-11 16:18:29,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:29,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:29,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349387002] [2020-09-11 16:18:29,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599414581] [2020-09-11 16:18:29,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:29,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 16:18:29,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:29,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:29,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:29,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:29,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:29,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666237951] [2020-09-11 16:18:29,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:29,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:29,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:29,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:29,800 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:30,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:30,423 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-11 16:18:30,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:18:30,424 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:30,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:30,424 INFO L225 Difference]: With dead ends: 118 [2020-09-11 16:18:30,425 INFO L226 Difference]: Without dead ends: 112 [2020-09-11 16:18:30,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 16:18:30,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-11 16:18:30,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-09-11 16:18:30,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:30,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:30,428 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:30,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:30,428 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:30,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:30,429 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:30,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:30,429 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:30,429 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:30,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:30,637 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:30,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:30,638 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-09-11 16:18:30,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:30,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384147439] [2020-09-11 16:18:30,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:30,963 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:30,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384147439] [2020-09-11 16:18:30,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111049266] [2020-09-11 16:18:30,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:31,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 16:18:31,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:31,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:31,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:31,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:31,067 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:31,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:31,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:31,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997834656] [2020-09-11 16:18:31,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:31,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:31,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:31,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:31,069 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:31,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:31,800 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-09-11 16:18:31,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:18:31,801 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:31,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:31,801 INFO L225 Difference]: With dead ends: 117 [2020-09-11 16:18:31,801 INFO L226 Difference]: Without dead ends: 111 [2020-09-11 16:18:31,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 16:18:31,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-11 16:18:31,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-09-11 16:18:31,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:31,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:31,804 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:31,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:31,804 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:31,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:31,804 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:31,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:31,805 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:31,805 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:32,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-11 16:18:32,006 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:32,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:32,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-09-11 16:18:32,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:32,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073021392] [2020-09-11 16:18:32,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:32,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:32,309 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:32,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073021392] [2020-09-11 16:18:32,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743835346] [2020-09-11 16:18:32,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:32,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:32,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:32,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:32,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:32,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248066437] [2020-09-11 16:18:32,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:32,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:32,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:32,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:32,387 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:33,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:33,080 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-09-11 16:18:33,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:18:33,081 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:33,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:33,081 INFO L225 Difference]: With dead ends: 114 [2020-09-11 16:18:33,081 INFO L226 Difference]: Without dead ends: 108 [2020-09-11 16:18:33,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 16:18:33,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-11 16:18:33,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-09-11 16:18:33,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:33,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:33,084 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:33,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:33,084 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:33,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:33,084 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:33,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:33,085 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:33,085 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:33,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-11 16:18:33,287 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:33,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:33,288 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-09-11 16:18:33,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:33,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333907394] [2020-09-11 16:18:33,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:33,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:33,595 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:33,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333907394] [2020-09-11 16:18:33,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630950851] [2020-09-11 16:18:33,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:33,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:33,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:33,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:33,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:33,683 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:33,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:33,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:33,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600735962] [2020-09-11 16:18:33,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:33,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:33,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:33,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:33,704 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:34,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:34,561 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-09-11 16:18:34,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:18:34,566 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:34,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:34,566 INFO L225 Difference]: With dead ends: 113 [2020-09-11 16:18:34,566 INFO L226 Difference]: Without dead ends: 107 [2020-09-11 16:18:34,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 16:18:34,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-11 16:18:34,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-09-11 16:18:34,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:34,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:34,568 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:34,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:34,569 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:34,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:34,569 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:34,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:34,569 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:34,569 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:34,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-11 16:18:34,775 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:34,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:34,775 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-09-11 16:18:34,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:34,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57698627] [2020-09-11 16:18:34,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:35,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57698627] [2020-09-11 16:18:35,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392189068] [2020-09-11 16:18:35,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:35,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 16:18:35,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:35,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:35,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:35,156 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:35,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:35,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:35,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830767265] [2020-09-11 16:18:35,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:35,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:35,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:35,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:35,158 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:35,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:35,923 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-09-11 16:18:35,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:18:35,924 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:35,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:35,925 INFO L225 Difference]: With dead ends: 110 [2020-09-11 16:18:35,925 INFO L226 Difference]: Without dead ends: 104 [2020-09-11 16:18:35,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:18:35,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-11 16:18:35,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-09-11 16:18:35,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:35,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:35,928 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:35,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:35,928 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:35,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:35,928 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:35,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:35,929 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:35,929 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:36,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-11 16:18:36,130 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:36,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:36,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-09-11 16:18:36,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:36,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142656011] [2020-09-11 16:18:36,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:36,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142656011] [2020-09-11 16:18:36,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36203862] [2020-09-11 16:18:36,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:36,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:18:36,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:36,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:36,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:36,514 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:36,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:36,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:36,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720128545] [2020-09-11 16:18:36,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:36,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:36,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:36,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:36,532 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:37,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:37,499 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-09-11 16:18:37,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:18:37,500 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:37,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:37,500 INFO L225 Difference]: With dead ends: 109 [2020-09-11 16:18:37,501 INFO L226 Difference]: Without dead ends: 103 [2020-09-11 16:18:37,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 16:18:37,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-11 16:18:37,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-09-11 16:18:37,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:37,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:37,503 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:37,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:37,503 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:37,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:37,503 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:37,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:37,504 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:37,504 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:37,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:37,705 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:37,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:37,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-09-11 16:18:37,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:37,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976748150] [2020-09-11 16:18:37,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:37,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:37,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976748150] [2020-09-11 16:18:37,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259583035] [2020-09-11 16:18:37,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:38,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 16:18:38,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:38,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:38,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:38,090 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:38,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:38,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:38,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518365254] [2020-09-11 16:18:38,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:38,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:38,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:38,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:38,091 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:38,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:38,930 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-09-11 16:18:38,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:18:38,931 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:38,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:38,931 INFO L225 Difference]: With dead ends: 106 [2020-09-11 16:18:38,931 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 16:18:38,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 16:18:38,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 16:18:38,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-09-11 16:18:38,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:38,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:38,934 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:38,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:38,934 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:38,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:38,935 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:38,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:38,935 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:38,935 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:39,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-09-11 16:18:39,142 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:39,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:39,143 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-09-11 16:18:39,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:39,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736799991] [2020-09-11 16:18:39,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:39,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:39,425 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:39,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736799991] [2020-09-11 16:18:39,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623163724] [2020-09-11 16:18:39,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:39,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 16:18:39,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:39,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:39,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:39,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:39,532 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:39,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:39,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:39,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731679800] [2020-09-11 16:18:39,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:39,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:39,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:39,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:39,534 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:40,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:40,618 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-09-11 16:18:40,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:18:40,619 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:40,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:40,619 INFO L225 Difference]: With dead ends: 105 [2020-09-11 16:18:40,620 INFO L226 Difference]: Without dead ends: 99 [2020-09-11 16:18:40,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 16:18:40,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-11 16:18:40,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-09-11 16:18:40,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:40,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:40,622 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:40,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:40,623 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:40,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:40,623 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:40,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:40,623 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:40,623 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:40,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:40,824 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:40,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:40,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-09-11 16:18:40,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:40,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876494495] [2020-09-11 16:18:40,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:41,096 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:41,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876494495] [2020-09-11 16:18:41,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807715017] [2020-09-11 16:18:41,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:41,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:41,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:41,177 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:41,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:41,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:41,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95164799] [2020-09-11 16:18:41,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:41,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:41,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:41,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:41,179 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:42,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:42,102 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-09-11 16:18:42,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:18:42,103 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:42,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:42,104 INFO L225 Difference]: With dead ends: 102 [2020-09-11 16:18:42,104 INFO L226 Difference]: Without dead ends: 96 [2020-09-11 16:18:42,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-09-11 16:18:42,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-11 16:18:42,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-09-11 16:18:42,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:42,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:42,107 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:42,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:42,108 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:42,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:42,108 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:42,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:42,108 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:42,108 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:42,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:42,317 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:42,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:42,318 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-09-11 16:18:42,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:42,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701485302] [2020-09-11 16:18:42,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:42,601 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:42,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701485302] [2020-09-11 16:18:42,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979336690] [2020-09-11 16:18:42,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:42,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:42,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:42,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:42,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:42,676 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:42,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:42,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:42,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520402782] [2020-09-11 16:18:42,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:42,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:42,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:42,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:42,694 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:43,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:43,897 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-11 16:18:43,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 16:18:43,898 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:43,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:43,899 INFO L225 Difference]: With dead ends: 101 [2020-09-11 16:18:43,899 INFO L226 Difference]: Without dead ends: 95 [2020-09-11 16:18:43,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-09-11 16:18:43,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-11 16:18:43,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-09-11 16:18:43,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:43,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:43,901 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:43,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:43,901 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:43,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:43,901 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:43,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:43,901 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:43,902 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:44,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-09-11 16:18:44,104 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:44,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:44,104 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-09-11 16:18:44,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:44,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077453701] [2020-09-11 16:18:44,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:44,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077453701] [2020-09-11 16:18:44,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089604717] [2020-09-11 16:18:44,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:44,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 16:18:44,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:44,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:44,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:44,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:44,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:44,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954860932] [2020-09-11 16:18:44,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:44,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:44,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:44,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:44,467 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:45,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:45,452 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-09-11 16:18:45,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-11 16:18:45,453 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:45,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:45,453 INFO L225 Difference]: With dead ends: 98 [2020-09-11 16:18:45,454 INFO L226 Difference]: Without dead ends: 92 [2020-09-11 16:18:45,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 16:18:45,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-11 16:18:45,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-09-11 16:18:45,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:45,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:45,456 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:45,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:45,456 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:45,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:45,456 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:45,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:45,457 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:45,457 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:45,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:45,658 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:45,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:45,658 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-09-11 16:18:45,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:45,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677714126] [2020-09-11 16:18:45,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:45,928 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:45,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677714126] [2020-09-11 16:18:45,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601736699] [2020-09-11 16:18:45,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:45,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:18:45,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:45,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:45,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:46,022 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:46,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:46,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:46,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450826343] [2020-09-11 16:18:46,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:46,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:46,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:46,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:46,042 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:47,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:47,348 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-09-11 16:18:47,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 16:18:47,349 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:47,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:47,350 INFO L225 Difference]: With dead ends: 97 [2020-09-11 16:18:47,350 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 16:18:47,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-09-11 16:18:47,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 16:18:47,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-09-11 16:18:47,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:47,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:47,352 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:47,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:47,353 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:47,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:47,353 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:47,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:47,353 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:47,353 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:47,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-11 16:18:47,554 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:47,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:47,555 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-09-11 16:18:47,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:47,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842689675] [2020-09-11 16:18:47,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:47,829 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:47,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842689675] [2020-09-11 16:18:47,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358522725] [2020-09-11 16:18:47,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:47,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 16:18:47,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:47,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:47,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:47,921 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:47,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:47,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:47,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296403686] [2020-09-11 16:18:47,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:47,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:47,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:47,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:47,923 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:48,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:48,990 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-09-11 16:18:48,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 16:18:48,991 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:48,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:48,992 INFO L225 Difference]: With dead ends: 113 [2020-09-11 16:18:48,992 INFO L226 Difference]: Without dead ends: 107 [2020-09-11 16:18:48,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-09-11 16:18:48,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-11 16:18:48,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-09-11 16:18:48,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-11 16:18:48,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-09-11 16:18:48,994 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-09-11 16:18:48,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:48,994 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-09-11 16:18:48,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:48,995 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-09-11 16:18:48,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:48,995 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:48,995 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:49,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-11 16:18:49,196 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:49,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:49,196 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-09-11 16:18:49,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:49,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051430046] [2020-09-11 16:18:49,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:49,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:49,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051430046] [2020-09-11 16:18:49,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116075813] [2020-09-11 16:18:49,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:49,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 16:18:49,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:49,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:49,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:49,560 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:49,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:49,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:49,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081744670] [2020-09-11 16:18:49,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:49,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:49,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:49,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:49,580 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-09-11 16:18:50,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:50,935 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-09-11 16:18:50,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-11 16:18:50,936 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:50,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:50,936 INFO L225 Difference]: With dead ends: 94 [2020-09-11 16:18:50,936 INFO L226 Difference]: Without dead ends: 86 [2020-09-11 16:18:50,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-09-11 16:18:50,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-11 16:18:50,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-09-11 16:18:50,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-11 16:18:50,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-09-11 16:18:50,939 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-09-11 16:18:50,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:50,939 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-09-11 16:18:50,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:50,939 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-09-11 16:18:50,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:50,939 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:50,939 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:51,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-11 16:18:51,140 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:51,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:51,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-09-11 16:18:51,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:51,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021498312] [2020-09-11 16:18:51,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:51,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021498312] [2020-09-11 16:18:51,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322558644] [2020-09-11 16:18:51,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:51,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:51,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:51,484 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:18:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:51,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:51,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:51,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663977245] [2020-09-11 16:18:51,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:51,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:51,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:51,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:51,510 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-09-11 16:18:52,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:52,773 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-11 16:18:52,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 16:18:52,774 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:52,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:52,775 INFO L225 Difference]: With dead ends: 108 [2020-09-11 16:18:52,775 INFO L226 Difference]: Without dead ends: 103 [2020-09-11 16:18:52,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-09-11 16:18:52,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-11 16:18:52,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-09-11 16:18:52,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 16:18:52,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-11 16:18:52,778 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-09-11 16:18:52,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:52,778 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-11 16:18:52,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:52,778 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-11 16:18:52,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:18:52,778 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:52,778 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:52,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-11 16:18:52,979 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:52,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:52,980 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-09-11 16:18:52,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:52,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033496] [2020-09-11 16:18:52,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:53,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033496] [2020-09-11 16:18:53,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253795223] [2020-09-11 16:18:53,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:53,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:53,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:53,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:18:53,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:53,367 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:18:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:53,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:53,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:18:53,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846239438] [2020-09-11 16:18:53,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:18:53,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:53,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:18:53,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:18:53,392 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-09-11 16:18:54,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:54,741 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-09-11 16:18:54,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 16:18:54,742 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:18:54,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:54,743 INFO L225 Difference]: With dead ends: 90 [2020-09-11 16:18:54,743 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 16:18:54,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-09-11 16:18:54,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 16:18:54,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-11 16:18:54,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:18:54,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-09-11 16:18:54,746 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-09-11 16:18:54,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:54,746 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-09-11 16:18:54,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:18:54,746 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-09-11 16:18:54,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:18:54,747 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:54,747 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:54,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:54,949 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:54,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:54,949 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-09-11 16:18:54,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:54,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833499777] [2020-09-11 16:18:54,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:55,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833499777] [2020-09-11 16:18:55,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325155121] [2020-09-11 16:18:55,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:55,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:18:55,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:55,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:18:55,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:55,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:55,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:18:55,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056317733] [2020-09-11 16:18:55,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:55,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:55,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:55,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:55,409 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-09-11 16:18:56,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:56,008 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-09-11 16:18:56,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:18:56,009 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:18:56,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:56,009 INFO L225 Difference]: With dead ends: 96 [2020-09-11 16:18:56,010 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 16:18:56,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 16:18:56,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 16:18:56,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-09-11 16:18:56,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 16:18:56,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-09-11 16:18:56,012 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-09-11 16:18:56,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:56,012 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-09-11 16:18:56,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:56,013 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-09-11 16:18:56,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:18:56,013 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:56,013 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:56,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:56,214 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:56,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:56,214 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-09-11 16:18:56,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:56,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691169999] [2020-09-11 16:18:56,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:56,597 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:56,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691169999] [2020-09-11 16:18:56,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936376458] [2020-09-11 16:18:56,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:56,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:18:56,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:56,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:18:56,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:56,685 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:56,697 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:56,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:56,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:18:56,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937152489] [2020-09-11 16:18:56,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:18:56,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:56,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:18:56,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:18:56,698 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-09-11 16:18:57,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:57,347 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-09-11 16:18:57,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:18:57,348 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:18:57,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:57,348 INFO L225 Difference]: With dead ends: 114 [2020-09-11 16:18:57,348 INFO L226 Difference]: Without dead ends: 108 [2020-09-11 16:18:57,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 16:18:57,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-11 16:18:57,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-09-11 16:18:57,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:18:57,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-09-11 16:18:57,351 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-09-11 16:18:57,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:57,351 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-09-11 16:18:57,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:18:57,351 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-09-11 16:18:57,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:18:57,352 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:57,352 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:57,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:57,553 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:57,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:57,553 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-09-11 16:18:57,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:57,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89337130] [2020-09-11 16:18:57,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:57,934 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:57,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89337130] [2020-09-11 16:18:57,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691732051] [2020-09-11 16:18:57,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:57,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 16:18:57,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:57,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:18:57,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:58,017 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:58,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:58,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:18:58,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645609531] [2020-09-11 16:18:58,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:58,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:58,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:58,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:58,019 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-09-11 16:18:58,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:58,740 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-09-11 16:18:58,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:18:58,741 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:18:58,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:58,741 INFO L225 Difference]: With dead ends: 115 [2020-09-11 16:18:58,742 INFO L226 Difference]: Without dead ends: 109 [2020-09-11 16:18:58,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 16:18:58,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-11 16:18:58,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-09-11 16:18:58,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-11 16:18:58,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-09-11 16:18:58,744 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-09-11 16:18:58,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:58,744 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-09-11 16:18:58,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:58,745 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-09-11 16:18:58,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:18:58,745 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:58,745 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:58,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:58,946 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:58,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:58,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-09-11 16:18:58,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:58,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368461308] [2020-09-11 16:18:58,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:58,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:59,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368461308] [2020-09-11 16:18:59,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862595021] [2020-09-11 16:18:59,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:59,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 16:18:59,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:59,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:18:59,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:59,423 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:59,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:59,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:18:59,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780008558] [2020-09-11 16:18:59,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:18:59,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:59,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:18:59,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:18:59,442 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-09-11 16:19:00,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:00,174 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-09-11 16:19:00,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:19:00,175 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:00,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:00,176 INFO L225 Difference]: With dead ends: 129 [2020-09-11 16:19:00,176 INFO L226 Difference]: Without dead ends: 123 [2020-09-11 16:19:00,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:19:00,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-11 16:19:00,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-09-11 16:19:00,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 16:19:00,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-09-11 16:19:00,179 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-09-11 16:19:00,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:00,179 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-09-11 16:19:00,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:00,180 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-09-11 16:19:00,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:00,180 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:00,180 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:00,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:00,388 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:00,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:00,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-09-11 16:19:00,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:00,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418271868] [2020-09-11 16:19:00,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:00,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:00,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418271868] [2020-09-11 16:19:00,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902976831] [2020-09-11 16:19:00,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:00,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:00,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:00,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:00,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:00,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:00,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14391839] [2020-09-11 16:19:00,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:00,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:00,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:00,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:00,820 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-09-11 16:19:01,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:01,588 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-09-11 16:19:01,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:19:01,589 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:01,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:01,590 INFO L225 Difference]: With dead ends: 129 [2020-09-11 16:19:01,590 INFO L226 Difference]: Without dead ends: 123 [2020-09-11 16:19:01,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 16:19:01,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-11 16:19:01,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-09-11 16:19:01,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-11 16:19:01,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-09-11 16:19:01,592 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-09-11 16:19:01,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:01,593 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-09-11 16:19:01,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:01,593 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-09-11 16:19:01,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:01,593 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:01,593 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:01,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:01,794 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:01,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:01,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-09-11 16:19:01,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:01,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652672159] [2020-09-11 16:19:01,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:02,157 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:02,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652672159] [2020-09-11 16:19:02,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115591826] [2020-09-11 16:19:02,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:02,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:19:02,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:02,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:02,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:02,255 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:02,270 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:02,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:02,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:02,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448212689] [2020-09-11 16:19:02,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:02,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:02,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:02,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:02,272 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-09-11 16:19:03,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:03,165 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-09-11 16:19:03,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:19:03,166 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:03,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:03,167 INFO L225 Difference]: With dead ends: 126 [2020-09-11 16:19:03,167 INFO L226 Difference]: Without dead ends: 120 [2020-09-11 16:19:03,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 16:19:03,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-11 16:19:03,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-09-11 16:19:03,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-11 16:19:03,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-09-11 16:19:03,170 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-09-11 16:19:03,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:03,170 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-09-11 16:19:03,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:03,170 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-09-11 16:19:03,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:03,171 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:03,171 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:03,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:03,374 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:03,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:03,375 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-09-11 16:19:03,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:03,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163652333] [2020-09-11 16:19:03,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:03,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:03,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163652333] [2020-09-11 16:19:03,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034800894] [2020-09-11 16:19:03,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:03,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:19:03,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:03,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:03,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:03,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:03,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:03,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480043860] [2020-09-11 16:19:03,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:03,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:03,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:03,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:03,802 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-09-11 16:19:04,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:04,635 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-09-11 16:19:04,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:19:04,636 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:04,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:04,637 INFO L225 Difference]: With dead ends: 127 [2020-09-11 16:19:04,637 INFO L226 Difference]: Without dead ends: 121 [2020-09-11 16:19:04,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 16:19:04,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-11 16:19:04,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-09-11 16:19:04,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:19:04,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-09-11 16:19:04,640 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-09-11 16:19:04,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:04,640 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-09-11 16:19:04,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:04,640 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-09-11 16:19:04,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:04,641 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:04,641 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:04,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-11 16:19:04,842 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:04,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:04,842 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-09-11 16:19:04,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:04,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893938096] [2020-09-11 16:19:04,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:04,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:05,193 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:05,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893938096] [2020-09-11 16:19:05,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051663515] [2020-09-11 16:19:05,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:05,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:19:05,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:05,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:05,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:05,289 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:05,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:05,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:05,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801119340] [2020-09-11 16:19:05,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:05,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:05,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:05,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:05,311 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-09-11 16:19:06,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:06,300 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-09-11 16:19:06,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:19:06,301 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:06,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:06,301 INFO L225 Difference]: With dead ends: 124 [2020-09-11 16:19:06,301 INFO L226 Difference]: Without dead ends: 118 [2020-09-11 16:19:06,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-09-11 16:19:06,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-11 16:19:06,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-09-11 16:19:06,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:19:06,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-09-11 16:19:06,304 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-09-11 16:19:06,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:06,304 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-09-11 16:19:06,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:06,304 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-09-11 16:19:06,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:06,305 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:06,305 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:06,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-09-11 16:19:06,506 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:06,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:06,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-09-11 16:19:06,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:06,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119599685] [2020-09-11 16:19:06,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:06,813 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:06,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119599685] [2020-09-11 16:19:06,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228665122] [2020-09-11 16:19:06,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:06,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 16:19:06,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:06,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:06,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:06,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:06,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:06,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727824177] [2020-09-11 16:19:06,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:06,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:06,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:06,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:06,916 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-09-11 16:19:07,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:07,808 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-09-11 16:19:07,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:19:07,809 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:07,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:07,810 INFO L225 Difference]: With dead ends: 125 [2020-09-11 16:19:07,810 INFO L226 Difference]: Without dead ends: 119 [2020-09-11 16:19:07,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 16:19:07,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-11 16:19:07,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-09-11 16:19:07,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-11 16:19:07,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-09-11 16:19:07,813 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-09-11 16:19:07,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:07,813 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-09-11 16:19:07,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:07,813 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-09-11 16:19:07,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:07,813 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:07,813 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:08,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-11 16:19:08,020 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:08,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:08,021 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-09-11 16:19:08,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:08,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253624034] [2020-09-11 16:19:08,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:08,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253624034] [2020-09-11 16:19:08,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394721937] [2020-09-11 16:19:08,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:08,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 16:19:08,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:08,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:08,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:08,456 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:08,474 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:08,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:08,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:08,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843520195] [2020-09-11 16:19:08,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:08,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:08,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:08,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:08,475 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-09-11 16:19:09,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:09,601 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-09-11 16:19:09,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:19:09,603 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:09,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:09,603 INFO L225 Difference]: With dead ends: 122 [2020-09-11 16:19:09,603 INFO L226 Difference]: Without dead ends: 116 [2020-09-11 16:19:09,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 16:19:09,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-11 16:19:09,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-09-11 16:19:09,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 16:19:09,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-09-11 16:19:09,606 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-09-11 16:19:09,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:09,606 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-09-11 16:19:09,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:09,607 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-09-11 16:19:09,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:09,607 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:09,607 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:09,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-11 16:19:09,808 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:09,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:09,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-09-11 16:19:09,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:09,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87221722] [2020-09-11 16:19:09,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:10,127 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:10,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87221722] [2020-09-11 16:19:10,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117091592] [2020-09-11 16:19:10,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:10,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:10,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:10,206 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:10,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:10,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:10,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560222305] [2020-09-11 16:19:10,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:10,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:10,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:10,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:10,208 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-09-11 16:19:11,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:11,221 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-11 16:19:11,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-11 16:19:11,222 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:11,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:11,223 INFO L225 Difference]: With dead ends: 123 [2020-09-11 16:19:11,223 INFO L226 Difference]: Without dead ends: 117 [2020-09-11 16:19:11,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-09-11 16:19:11,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-11 16:19:11,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-09-11 16:19:11,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-11 16:19:11,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-09-11 16:19:11,226 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-09-11 16:19:11,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:11,226 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-09-11 16:19:11,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:11,226 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-09-11 16:19:11,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:11,227 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:11,227 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:11,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:11,428 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:11,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:11,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-09-11 16:19:11,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:11,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647511501] [2020-09-11 16:19:11,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:11,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647511501] [2020-09-11 16:19:11,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423249823] [2020-09-11 16:19:11,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:11,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:19:11,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:11,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:11,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:11,843 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:11,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:11,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:11,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318682728] [2020-09-11 16:19:11,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:11,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:11,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:11,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:11,862 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-09-11 16:19:13,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:13,069 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-09-11 16:19:13,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 16:19:13,070 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:13,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:13,071 INFO L225 Difference]: With dead ends: 120 [2020-09-11 16:19:13,071 INFO L226 Difference]: Without dead ends: 114 [2020-09-11 16:19:13,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-09-11 16:19:13,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-11 16:19:13,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-09-11 16:19:13,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-11 16:19:13,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-09-11 16:19:13,074 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-09-11 16:19:13,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:13,074 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-09-11 16:19:13,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:13,074 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-09-11 16:19:13,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:13,074 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:13,074 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:13,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:13,275 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:13,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:13,276 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-09-11 16:19:13,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:13,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455414152] [2020-09-11 16:19:13,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:13,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:13,584 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:13,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455414152] [2020-09-11 16:19:13,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591221340] [2020-09-11 16:19:13,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:13,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:19:13,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:13,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:13,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:13,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:13,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:13,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055248809] [2020-09-11 16:19:13,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:13,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:13,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:13,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:13,680 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-09-11 16:19:14,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:14,747 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-11 16:19:14,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 16:19:14,749 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:14,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:14,749 INFO L225 Difference]: With dead ends: 121 [2020-09-11 16:19:14,749 INFO L226 Difference]: Without dead ends: 115 [2020-09-11 16:19:14,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-09-11 16:19:14,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-11 16:19:14,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-09-11 16:19:14,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:19:14,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:19:14,752 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-09-11 16:19:14,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:14,753 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:19:14,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:14,753 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:19:14,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:14,753 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:14,753 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:14,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-09-11 16:19:14,954 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:14,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:14,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-09-11 16:19:14,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:14,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951258546] [2020-09-11 16:19:14,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:14,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:15,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951258546] [2020-09-11 16:19:15,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117820050] [2020-09-11 16:19:15,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:15,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:19:15,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:15,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:15,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:15,364 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:15,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:15,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:15,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677918126] [2020-09-11 16:19:15,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:15,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:15,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:15,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:15,384 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-09-11 16:19:16,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:16,710 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-11 16:19:16,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 16:19:16,711 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:16,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:16,712 INFO L225 Difference]: With dead ends: 118 [2020-09-11 16:19:16,712 INFO L226 Difference]: Without dead ends: 112 [2020-09-11 16:19:16,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-09-11 16:19:16,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-11 16:19:16,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-09-11 16:19:16,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:19:16,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:19:16,715 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-09-11 16:19:16,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:16,715 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:19:16,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:16,715 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:19:16,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:16,715 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:16,715 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:16,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:16,916 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:16,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:16,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-09-11 16:19:16,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:16,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987791408] [2020-09-11 16:19:16,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:17,214 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:17,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987791408] [2020-09-11 16:19:17,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297709306] [2020-09-11 16:19:17,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:17,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 16:19:17,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:17,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:17,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:17,313 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:17,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:17,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:17,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215042068] [2020-09-11 16:19:17,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:17,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:17,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:17,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:17,315 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-09-11 16:19:18,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:18,528 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-09-11 16:19:18,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-11 16:19:18,529 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:18,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:18,530 INFO L225 Difference]: With dead ends: 119 [2020-09-11 16:19:18,530 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 16:19:18,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-09-11 16:19:18,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 16:19:18,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-09-11 16:19:18,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-11 16:19:18,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-09-11 16:19:18,534 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-09-11 16:19:18,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:18,535 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-09-11 16:19:18,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:18,535 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-09-11 16:19:18,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:18,535 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:18,535 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:18,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:18,736 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:18,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:18,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-09-11 16:19:18,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:18,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154703735] [2020-09-11 16:19:18,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:19,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154703735] [2020-09-11 16:19:19,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284138864] [2020-09-11 16:19:19,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:19,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 16:19:19,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:19,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:19,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:19,145 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:19,165 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:19,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:19,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:19,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845816315] [2020-09-11 16:19:19,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:19,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:19,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:19,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:19,167 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-09-11 16:19:20,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:20,603 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-09-11 16:19:20,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-11 16:19:20,604 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:20,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:20,605 INFO L225 Difference]: With dead ends: 116 [2020-09-11 16:19:20,605 INFO L226 Difference]: Without dead ends: 110 [2020-09-11 16:19:20,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-09-11 16:19:20,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-11 16:19:20,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-09-11 16:19:20,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 16:19:20,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-11 16:19:20,608 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-09-11 16:19:20,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:20,608 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-11 16:19:20,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:20,608 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-11 16:19:20,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:20,609 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:20,609 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:20,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:20,810 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:20,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:20,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-09-11 16:19:20,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:20,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546389467] [2020-09-11 16:19:20,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:21,117 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:21,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546389467] [2020-09-11 16:19:21,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176664551] [2020-09-11 16:19:21,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:21,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:21,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:21,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:21,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:21,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:21,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207875975] [2020-09-11 16:19:21,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:21,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:21,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:21,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:21,203 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-09-11 16:19:22,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:22,425 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-09-11 16:19:22,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-11 16:19:22,426 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:22,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:22,427 INFO L225 Difference]: With dead ends: 136 [2020-09-11 16:19:22,427 INFO L226 Difference]: Without dead ends: 130 [2020-09-11 16:19:22,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-09-11 16:19:22,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-11 16:19:22,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-09-11 16:19:22,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-11 16:19:22,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-09-11 16:19:22,430 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-09-11 16:19:22,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:22,431 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-09-11 16:19:22,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:22,431 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-09-11 16:19:22,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:22,431 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:22,432 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:22,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:22,639 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:22,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:22,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-09-11 16:19:22,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:22,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291817243] [2020-09-11 16:19:22,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:22,929 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:22,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291817243] [2020-09-11 16:19:22,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962142518] [2020-09-11 16:19:22,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:22,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:19:22,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:22,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:22,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:23,040 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:23,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:23,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:23,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773962785] [2020-09-11 16:19:23,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:23,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:23,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:23,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:23,042 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-09-11 16:19:24,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:24,476 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-09-11 16:19:24,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-11 16:19:24,478 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:24,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:24,478 INFO L225 Difference]: With dead ends: 117 [2020-09-11 16:19:24,478 INFO L226 Difference]: Without dead ends: 109 [2020-09-11 16:19:24,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=910, Invalid=2282, Unknown=0, NotChecked=0, Total=3192 [2020-09-11 16:19:24,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-11 16:19:24,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-09-11 16:19:24,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-11 16:19:24,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-09-11 16:19:24,482 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-09-11 16:19:24,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:24,482 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-09-11 16:19:24,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:24,483 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-09-11 16:19:24,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:24,483 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:24,483 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:24,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:24,684 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:24,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:24,684 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-09-11 16:19:24,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:24,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604305204] [2020-09-11 16:19:24,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:25,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604305204] [2020-09-11 16:19:25,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169314728] [2020-09-11 16:19:25,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:25,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:19:25,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:25,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:25,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:25,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:25,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:25,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184074390] [2020-09-11 16:19:25,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:25,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:25,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:25,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:25,192 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-09-11 16:19:25,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:25,899 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-09-11 16:19:25,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:19:25,900 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:25,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:25,901 INFO L225 Difference]: With dead ends: 134 [2020-09-11 16:19:25,901 INFO L226 Difference]: Without dead ends: 128 [2020-09-11 16:19:25,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 16:19:25,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-11 16:19:25,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-09-11 16:19:25,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:25,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:25,904 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:25,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:25,904 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:25,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:25,904 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:25,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:25,904 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:25,904 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:26,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-09-11 16:19:26,105 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:26,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:26,106 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-09-11 16:19:26,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:26,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962588340] [2020-09-11 16:19:26,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:26,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962588340] [2020-09-11 16:19:26,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125174338] [2020-09-11 16:19:26,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:26,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:19:26,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:26,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:26,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:26,647 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:26,666 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:26,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:26,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:26,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749468676] [2020-09-11 16:19:26,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:26,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:26,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:26,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:26,667 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:27,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:27,490 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-09-11 16:19:27,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:19:27,491 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:27,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:27,492 INFO L225 Difference]: With dead ends: 131 [2020-09-11 16:19:27,492 INFO L226 Difference]: Without dead ends: 125 [2020-09-11 16:19:27,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 16:19:27,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-11 16:19:27,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-09-11 16:19:27,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:27,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:27,495 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:27,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:27,495 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:27,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:27,495 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:27,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:27,496 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:27,496 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:27,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-11 16:19:27,697 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:27,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:27,697 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-09-11 16:19:27,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:27,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933216655] [2020-09-11 16:19:27,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:28,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933216655] [2020-09-11 16:19:28,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744182105] [2020-09-11 16:19:28,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:28,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 16:19:28,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:28,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:28,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:28,213 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:28,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:28,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:28,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221596291] [2020-09-11 16:19:28,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:28,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:28,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:28,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:28,215 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:28,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:28,994 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-09-11 16:19:28,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:19:28,995 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:28,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:28,996 INFO L225 Difference]: With dead ends: 128 [2020-09-11 16:19:28,996 INFO L226 Difference]: Without dead ends: 122 [2020-09-11 16:19:28,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:19:28,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-11 16:19:28,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-09-11 16:19:28,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:28,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:28,999 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:28,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:28,999 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:28,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:29,000 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:29,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:29,000 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:29,000 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:29,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:29,201 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:29,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:29,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-09-11 16:19:29,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:29,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647808273] [2020-09-11 16:19:29,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:29,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:29,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647808273] [2020-09-11 16:19:29,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278821303] [2020-09-11 16:19:29,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:29,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 16:19:29,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:29,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:29,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:29,715 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:29,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:29,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:29,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378417445] [2020-09-11 16:19:29,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:29,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:29,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:29,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:29,730 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:30,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:30,660 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-09-11 16:19:30,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:19:30,661 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:30,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:30,662 INFO L225 Difference]: With dead ends: 127 [2020-09-11 16:19:30,662 INFO L226 Difference]: Without dead ends: 121 [2020-09-11 16:19:30,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 16:19:30,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-11 16:19:30,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-09-11 16:19:30,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:30,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:30,665 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:30,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:30,665 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:30,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:30,665 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:30,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:30,665 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:30,665 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:30,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-09-11 16:19:30,866 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:30,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:30,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-09-11 16:19:30,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:30,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780629544] [2020-09-11 16:19:30,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:31,261 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:31,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780629544] [2020-09-11 16:19:31,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46896412] [2020-09-11 16:19:31,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:31,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:31,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:31,341 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:31,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:31,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:31,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982900973] [2020-09-11 16:19:31,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:31,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:31,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:31,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:31,342 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:32,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:32,191 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-09-11 16:19:32,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:19:32,192 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:32,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:32,193 INFO L225 Difference]: With dead ends: 124 [2020-09-11 16:19:32,193 INFO L226 Difference]: Without dead ends: 118 [2020-09-11 16:19:32,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 16:19:32,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-11 16:19:32,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-09-11 16:19:32,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:32,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:32,195 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:32,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:32,196 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:32,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:32,196 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:32,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:32,196 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:32,196 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:32,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:32,397 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:32,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:32,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-09-11 16:19:32,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:32,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266089179] [2020-09-11 16:19:32,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:32,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:32,801 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:32,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266089179] [2020-09-11 16:19:32,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172841660] [2020-09-11 16:19:32,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:32,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:19:32,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:32,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:32,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:32,894 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:32,909 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:32,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:32,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:32,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249973687] [2020-09-11 16:19:32,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:32,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:32,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:32,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:32,911 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:33,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:33,968 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-09-11 16:19:33,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:19:33,969 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:33,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:33,970 INFO L225 Difference]: With dead ends: 123 [2020-09-11 16:19:33,970 INFO L226 Difference]: Without dead ends: 117 [2020-09-11 16:19:33,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 16:19:33,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-11 16:19:33,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-09-11 16:19:33,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:33,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:33,973 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:33,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:33,973 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:33,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:33,973 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:33,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:33,973 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:33,973 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:34,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:34,174 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:34,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:34,175 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-09-11 16:19:34,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:34,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378051823] [2020-09-11 16:19:34,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:34,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378051823] [2020-09-11 16:19:34,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879922594] [2020-09-11 16:19:34,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:34,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:19:34,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:34,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:34,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:34,650 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:34,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:34,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:34,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034244701] [2020-09-11 16:19:34,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:34,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:34,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:34,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:34,652 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:35,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:35,581 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-11 16:19:35,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:19:35,582 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:35,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:35,583 INFO L225 Difference]: With dead ends: 120 [2020-09-11 16:19:35,583 INFO L226 Difference]: Without dead ends: 114 [2020-09-11 16:19:35,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-09-11 16:19:35,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-11 16:19:35,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-09-11 16:19:35,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:35,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:35,585 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:35,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:35,586 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:35,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:35,586 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:35,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:35,586 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:35,587 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:35,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:35,788 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:35,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:35,788 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-09-11 16:19:35,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:35,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680674422] [2020-09-11 16:19:35,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:36,171 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:36,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680674422] [2020-09-11 16:19:36,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429210092] [2020-09-11 16:19:36,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:36,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:19:36,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:36,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:36,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:36,258 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:36,274 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:36,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:36,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:36,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028377807] [2020-09-11 16:19:36,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:36,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:36,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:36,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:36,276 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:37,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:37,469 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-09-11 16:19:37,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:19:37,470 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:37,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:37,471 INFO L225 Difference]: With dead ends: 119 [2020-09-11 16:19:37,471 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 16:19:37,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-09-11 16:19:37,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 16:19:37,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-09-11 16:19:37,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:37,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:37,476 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:37,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:37,476 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:37,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:37,476 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:37,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:37,477 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:37,477 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:37,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:37,685 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:37,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:37,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-09-11 16:19:37,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:37,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686241739] [2020-09-11 16:19:37,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:37,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:38,052 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:38,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686241739] [2020-09-11 16:19:38,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361826800] [2020-09-11 16:19:38,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:38,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 16:19:38,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:38,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:38,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:38,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:38,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:38,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791054972] [2020-09-11 16:19:38,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:38,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:38,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:38,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:38,138 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:39,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:39,188 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-09-11 16:19:39,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:19:39,190 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:39,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:39,190 INFO L225 Difference]: With dead ends: 116 [2020-09-11 16:19:39,190 INFO L226 Difference]: Without dead ends: 110 [2020-09-11 16:19:39,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 16:19:39,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-11 16:19:39,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-09-11 16:19:39,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:39,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:39,193 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:39,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:39,193 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:39,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:39,193 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:39,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:39,193 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:39,194 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:39,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-09-11 16:19:39,395 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:39,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:39,395 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-09-11 16:19:39,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:39,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782208204] [2020-09-11 16:19:39,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:39,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:39,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782208204] [2020-09-11 16:19:39,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380024299] [2020-09-11 16:19:39,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:39,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 16:19:39,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:39,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:39,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:39,869 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:39,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:39,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:39,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674749453] [2020-09-11 16:19:39,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:39,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:39,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:39,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:39,888 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:41,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:41,218 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-09-11 16:19:41,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 16:19:41,219 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:41,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:41,220 INFO L225 Difference]: With dead ends: 115 [2020-09-11 16:19:41,220 INFO L226 Difference]: Without dead ends: 109 [2020-09-11 16:19:41,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-09-11 16:19:41,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-11 16:19:41,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-09-11 16:19:41,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:41,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:41,223 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:41,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:41,225 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:41,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:41,225 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:41,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:41,226 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:41,226 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:41,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:41,434 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:41,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:41,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-09-11 16:19:41,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:41,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854859450] [2020-09-11 16:19:41,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:41,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854859450] [2020-09-11 16:19:41,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433620823] [2020-09-11 16:19:41,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:41,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:41,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:41,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:41,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:41,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577148580] [2020-09-11 16:19:41,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:41,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:41,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:41,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:41,867 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:43,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:43,011 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-09-11 16:19:43,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-11 16:19:43,012 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:43,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:43,012 INFO L225 Difference]: With dead ends: 112 [2020-09-11 16:19:43,013 INFO L226 Difference]: Without dead ends: 106 [2020-09-11 16:19:43,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-09-11 16:19:43,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-11 16:19:43,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-09-11 16:19:43,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:43,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:43,016 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:43,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:43,016 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:43,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:43,016 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:43,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:43,017 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:43,017 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:43,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-09-11 16:19:43,219 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:43,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:43,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-09-11 16:19:43,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:43,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98222503] [2020-09-11 16:19:43,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:43,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98222503] [2020-09-11 16:19:43,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143367127] [2020-09-11 16:19:43,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:43,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:19:43,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:43,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:43,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:43,679 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:43,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:43,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:43,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917824487] [2020-09-11 16:19:43,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:43,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:43,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:43,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:43,700 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:45,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:45,148 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-09-11 16:19:45,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 16:19:45,149 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:45,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:45,150 INFO L225 Difference]: With dead ends: 111 [2020-09-11 16:19:45,150 INFO L226 Difference]: Without dead ends: 105 [2020-09-11 16:19:45,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-09-11 16:19:45,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-11 16:19:45,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-09-11 16:19:45,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:45,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:45,152 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:45,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:45,152 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:45,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:45,152 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:45,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:45,152 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:45,152 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:45,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-09-11 16:19:45,353 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:45,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:45,354 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-09-11 16:19:45,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:45,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305889518] [2020-09-11 16:19:45,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:45,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:45,669 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:45,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305889518] [2020-09-11 16:19:45,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681350883] [2020-09-11 16:19:45,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:45,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:19:45,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:45,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:45,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:45,767 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:45,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:45,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:45,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796085351] [2020-09-11 16:19:45,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:45,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:45,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:45,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:45,768 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:46,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:46,994 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-11 16:19:46,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 16:19:46,995 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:46,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:46,995 INFO L225 Difference]: With dead ends: 108 [2020-09-11 16:19:46,995 INFO L226 Difference]: Without dead ends: 102 [2020-09-11 16:19:46,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-09-11 16:19:46,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-11 16:19:46,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-09-11 16:19:46,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:46,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:46,998 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:46,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:46,999 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:46,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:46,999 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:46,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:46,999 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:46,999 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:47,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:47,203 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:47,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:47,203 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-09-11 16:19:47,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:47,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660929115] [2020-09-11 16:19:47,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:47,561 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:47,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660929115] [2020-09-11 16:19:47,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627072094] [2020-09-11 16:19:47,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:47,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:19:47,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:47,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:47,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:47,654 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:47,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:47,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:47,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129681771] [2020-09-11 16:19:47,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:47,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:47,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:47,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:47,673 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:49,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:49,295 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-11 16:19:49,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-11 16:19:49,296 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:49,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:49,297 INFO L225 Difference]: With dead ends: 107 [2020-09-11 16:19:49,297 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 16:19:49,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-09-11 16:19:49,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 16:19:49,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-09-11 16:19:49,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:49,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:49,301 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:49,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:49,301 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:49,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:49,302 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:49,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:49,302 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:49,302 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:49,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:49,510 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:49,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:49,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-09-11 16:19:49,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:49,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148567827] [2020-09-11 16:19:49,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:49,856 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:49,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148567827] [2020-09-11 16:19:49,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482980454] [2020-09-11 16:19:49,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:49,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 16:19:49,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:49,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:49,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:49,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:49,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:49,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724360827] [2020-09-11 16:19:49,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:49,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:49,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:49,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:49,951 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:51,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:51,284 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-09-11 16:19:51,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-11 16:19:51,285 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:51,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:51,286 INFO L225 Difference]: With dead ends: 104 [2020-09-11 16:19:51,286 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 16:19:51,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-09-11 16:19:51,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 16:19:51,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-09-11 16:19:51,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:51,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:51,288 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:51,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:51,289 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:51,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:51,289 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:51,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:51,289 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:51,289 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:51,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:51,490 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:51,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:51,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-09-11 16:19:51,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:51,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686093551] [2020-09-11 16:19:51,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:51,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686093551] [2020-09-11 16:19:51,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363867564] [2020-09-11 16:19:51,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:51,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 16:19:51,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:51,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:51,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:51,935 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:51,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:51,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:51,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550815788] [2020-09-11 16:19:51,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:51,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:51,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:51,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:51,965 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:53,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:53,705 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-09-11 16:19:53,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-11 16:19:53,706 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:53,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:53,707 INFO L225 Difference]: With dead ends: 103 [2020-09-11 16:19:53,707 INFO L226 Difference]: Without dead ends: 97 [2020-09-11 16:19:53,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-09-11 16:19:53,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-11 16:19:53,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-09-11 16:19:53,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:53,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:53,708 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:53,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:53,709 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:53,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:53,709 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:53,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:53,709 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:53,709 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:53,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-09-11 16:19:53,910 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:53,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:53,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-09-11 16:19:53,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:53,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445641912] [2020-09-11 16:19:53,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:53,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:54,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445641912] [2020-09-11 16:19:54,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797806526] [2020-09-11 16:19:54,256 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:54,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:54,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:54,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:54,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:54,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787277588] [2020-09-11 16:19:54,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:54,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:54,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:54,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:54,355 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:55,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:55,756 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-09-11 16:19:55,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-11 16:19:55,758 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:55,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:55,758 INFO L225 Difference]: With dead ends: 119 [2020-09-11 16:19:55,758 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 16:19:55,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-09-11 16:19:55,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 16:19:55,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-09-11 16:19:55,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-11 16:19:55,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-09-11 16:19:55,761 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-09-11 16:19:55,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:55,761 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-09-11 16:19:55,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:55,762 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-09-11 16:19:55,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:55,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:55,762 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:55,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:55,963 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:55,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:55,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-09-11 16:19:55,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:55,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889351068] [2020-09-11 16:19:55,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:56,294 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:56,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889351068] [2020-09-11 16:19:56,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649883308] [2020-09-11 16:19:56,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:56,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:19:56,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:56,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 16:19:56,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:56,427 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:56,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:56,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:56,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282752102] [2020-09-11 16:19:56,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:56,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:56,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:56,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:56,429 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-09-11 16:19:58,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:58,056 INFO L93 Difference]: Finished difference Result 98 states and 245 transitions. [2020-09-11 16:19:58,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-11 16:19:58,057 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:58,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:58,058 INFO L225 Difference]: With dead ends: 98 [2020-09-11 16:19:58,058 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 16:19:58,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=924, Invalid=2382, Unknown=0, NotChecked=0, Total=3306 [2020-09-11 16:19:58,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 16:19:58,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 65. [2020-09-11 16:19:58,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-11 16:19:58,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-09-11 16:19:58,060 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-09-11 16:19:58,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:58,061 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-09-11 16:19:58,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:58,061 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-09-11 16:19:58,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:58,061 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:58,061 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:58,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:58,262 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:58,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:58,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-09-11 16:19:58,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:58,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651230111] [2020-09-11 16:19:58,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:58,612 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:58,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651230111] [2020-09-11 16:19:58,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586555989] [2020-09-11 16:19:58,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:58,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:19:58,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:58,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:58,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:58,713 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:19:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:58,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:58,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:58,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697064696] [2020-09-11 16:19:58,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:58,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:58,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:58,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:58,744 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-09-11 16:20:00,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:00,399 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-09-11 16:20:00,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-11 16:20:00,401 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:20:00,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:00,401 INFO L225 Difference]: With dead ends: 116 [2020-09-11 16:20:00,401 INFO L226 Difference]: Without dead ends: 111 [2020-09-11 16:20:00,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-09-11 16:20:00,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-11 16:20:00,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-09-11 16:20:00,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-11 16:20:00,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-09-11 16:20:00,404 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-09-11 16:20:00,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:00,404 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-09-11 16:20:00,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:20:00,404 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-09-11 16:20:00,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 16:20:00,404 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:00,404 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:00,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:00,605 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:00,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:00,606 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-09-11 16:20:00,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:00,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288350762] [2020-09-11 16:20:00,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:00,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:00,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288350762] [2020-09-11 16:20:00,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858446552] [2020-09-11 16:20:00,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:01,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:20:01,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:20:01,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 16:20:01,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:01,071 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:20:01,102 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:01,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:01,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-11 16:20:01,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55637564] [2020-09-11 16:20:01,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 16:20:01,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:01,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 16:20:01,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:20:01,104 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-09-11 16:20:02,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:02,939 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-09-11 16:20:02,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-11 16:20:02,941 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-11 16:20:02,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:02,941 INFO L225 Difference]: With dead ends: 96 [2020-09-11 16:20:02,941 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 16:20:02,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-09-11 16:20:02,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 16:20:02,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-09-11 16:20:02,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 16:20:02,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-09-11 16:20:02,944 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-09-11 16:20:02,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:02,945 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-09-11 16:20:02,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 16:20:02,945 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-09-11 16:20:02,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 16:20:02,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:02,945 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:03,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:03,154 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:03,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:03,154 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-09-11 16:20:03,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:03,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204791515] [2020-09-11 16:20:03,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:03,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204791515] [2020-09-11 16:20:03,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687198752] [2020-09-11 16:20:03,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:03,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-11 16:20:03,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:20:03,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 16:20:03,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:03,727 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:03,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:03,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-11 16:20:03,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797384180] [2020-09-11 16:20:03,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:20:03,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:03,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:20:03,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:20:03,728 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-09-11 16:20:04,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:04,516 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-09-11 16:20:04,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:20:04,518 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-11 16:20:04,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:04,518 INFO L225 Difference]: With dead ends: 102 [2020-09-11 16:20:04,518 INFO L226 Difference]: Without dead ends: 96 [2020-09-11 16:20:04,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 16:20:04,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-11 16:20:04,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-09-11 16:20:04,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:20:04,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-09-11 16:20:04,521 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-09-11 16:20:04,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:04,521 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-09-11 16:20:04,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:20:04,521 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-09-11 16:20:04,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 16:20:04,521 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:04,522 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:04,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-09-11 16:20:04,722 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:04,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:04,723 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-09-11 16:20:04,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:04,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916375811] [2020-09-11 16:20:04,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:04,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:05,231 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:05,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916375811] [2020-09-11 16:20:05,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247032197] [2020-09-11 16:20:05,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:05,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-11 16:20:05,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:20:05,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 16:20:05,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:05,335 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:20:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:05,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:05,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-11 16:20:05,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579069332] [2020-09-11 16:20:05,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 16:20:05,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:05,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 16:20:05,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:20:05,352 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-09-11 16:20:06,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:06,113 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-09-11 16:20:06,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:20:06,114 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-11 16:20:06,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:06,114 INFO L225 Difference]: With dead ends: 122 [2020-09-11 16:20:06,115 INFO L226 Difference]: Without dead ends: 116 [2020-09-11 16:20:06,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 16:20:06,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-11 16:20:06,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-09-11 16:20:06,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-11 16:20:06,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-09-11 16:20:06,117 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-09-11 16:20:06,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:06,118 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-09-11 16:20:06,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 16:20:06,118 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-09-11 16:20:06,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 16:20:06,118 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:06,118 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:06,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-09-11 16:20:06,319 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:06,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:06,320 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-09-11 16:20:06,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:06,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879076039] [2020-09-11 16:20:06,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:06,812 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:06,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879076039] [2020-09-11 16:20:06,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054430804] [2020-09-11 16:20:06,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:06,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 16:20:06,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:06,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:06,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-11 16:20:06,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993409038] [2020-09-11 16:20:06,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:20:06,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:06,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:20:06,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:20:06,894 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-09-11 16:20:07,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:07,834 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-09-11 16:20:07,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:20:07,835 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-11 16:20:07,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:07,836 INFO L225 Difference]: With dead ends: 123 [2020-09-11 16:20:07,836 INFO L226 Difference]: Without dead ends: 117 [2020-09-11 16:20:07,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 16:20:07,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-11 16:20:07,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-09-11 16:20:07,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:20:07,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-09-11 16:20:07,839 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-09-11 16:20:07,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:07,839 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-09-11 16:20:07,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:20:07,839 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-09-11 16:20:07,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 16:20:07,840 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:07,840 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:08,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-09-11 16:20:08,041 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:08,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:08,042 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-09-11 16:20:08,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:08,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130328223] [2020-09-11 16:20:08,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:08,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130328223] [2020-09-11 16:20:08,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780681605] [2020-09-11 16:20:08,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:08,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:20:08,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:20:08,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 16:20:08,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:08,692 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:20:08,709 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:08,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:08,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-11 16:20:08,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341275202] [2020-09-11 16:20:08,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 16:20:08,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:08,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 16:20:08,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:20:08,710 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-09-11 16:20:09,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:09,711 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-09-11 16:20:09,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:20:09,712 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-11 16:20:09,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:09,713 INFO L225 Difference]: With dead ends: 139 [2020-09-11 16:20:09,713 INFO L226 Difference]: Without dead ends: 133 [2020-09-11 16:20:09,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-09-11 16:20:09,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-11 16:20:09,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-09-11 16:20:09,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:20:09,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-09-11 16:20:09,716 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-09-11 16:20:09,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:09,716 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-09-11 16:20:09,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 16:20:09,716 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-09-11 16:20:09,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 16:20:09,717 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:09,717 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:09,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-09-11 16:20:09,925 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:09,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:09,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-09-11 16:20:09,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:09,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096179634] [2020-09-11 16:20:09,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:10,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096179634] [2020-09-11 16:20:10,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693169395] [2020-09-11 16:20:10,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:10,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-11 16:20:10,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:20:10,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 16:20:10,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:10,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:10,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-11 16:20:10,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320618624] [2020-09-11 16:20:10,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:20:10,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:10,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:20:10,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:20:10,481 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-09-11 16:20:11,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:11,463 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-09-11 16:20:11,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:20:11,464 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-11 16:20:11,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:11,465 INFO L225 Difference]: With dead ends: 139 [2020-09-11 16:20:11,465 INFO L226 Difference]: Without dead ends: 133 [2020-09-11 16:20:11,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 16:20:11,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-11 16:20:11,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-09-11 16:20:11,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-11 16:20:11,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-09-11 16:20:11,468 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-09-11 16:20:11,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:11,468 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-09-11 16:20:11,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:20:11,468 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-09-11 16:20:11,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 16:20:11,468 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:11,469 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:11,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:11,669 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:11,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:11,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-09-11 16:20:11,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:11,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119157076] [2020-09-11 16:20:11,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:12,143 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:12,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119157076] [2020-09-11 16:20:12,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520324393] [2020-09-11 16:20:12,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:12,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:20:12,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:20:12,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 16:20:12,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:12,252 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:20:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:12,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:12,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-11 16:20:12,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041369988] [2020-09-11 16:20:12,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 16:20:12,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:12,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 16:20:12,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:20:12,270 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-09-11 16:20:13,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:13,370 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-09-11 16:20:13,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:20:13,371 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-11 16:20:13,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:13,371 INFO L225 Difference]: With dead ends: 136 [2020-09-11 16:20:13,371 INFO L226 Difference]: Without dead ends: 130 [2020-09-11 16:20:13,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 16:20:13,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-11 16:20:13,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-09-11 16:20:13,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 16:20:13,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-09-11 16:20:13,373 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-09-11 16:20:13,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:13,374 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-09-11 16:20:13,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 16:20:13,374 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-09-11 16:20:13,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 16:20:13,374 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:13,374 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:13,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-09-11 16:20:13,575 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:13,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:13,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-09-11 16:20:13,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:13,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891208468] [2020-09-11 16:20:13,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:14,023 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:14,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891208468] [2020-09-11 16:20:14,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911867392] [2020-09-11 16:20:14,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:14,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-11 16:20:14,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:20:14,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 16:20:14,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:14,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:14,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-11 16:20:14,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507954095] [2020-09-11 16:20:14,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:20:14,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:14,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:20:14,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:20:14,111 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-09-11 16:20:15,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:15,146 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-09-11 16:20:15,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:20:15,147 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-11 16:20:15,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:15,147 INFO L225 Difference]: With dead ends: 137 [2020-09-11 16:20:15,147 INFO L226 Difference]: Without dead ends: 131 [2020-09-11 16:20:15,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-09-11 16:20:15,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-11 16:20:15,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-09-11 16:20:15,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-11 16:20:15,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-09-11 16:20:15,151 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-09-11 16:20:15,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:15,151 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-09-11 16:20:15,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:20:15,151 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-09-11 16:20:15,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 16:20:15,151 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:15,151 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:15,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:15,352 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:15,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:15,353 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-09-11 16:20:15,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:15,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45707107] [2020-09-11 16:20:15,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2020-09-11 16:20:15,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2020-09-11 16:20:15,751 WARN L544 AbstractCegarLoop]: Verification canceled [2020-09-11 16:20:15,755 WARN L228 ceAbstractionStarter]: Timeout [2020-09-11 16:20:15,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 04:20:15 BasicIcfg [2020-09-11 16:20:15,756 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-11 16:20:15,763 INFO L168 Benchmark]: Toolchain (without parser) took 247877.56 ms. Allocated memory was 140.0 MB in the beginning and 220.2 MB in the end (delta: 80.2 MB). Free memory was 101.9 MB in the beginning and 130.3 MB in the end (delta: -28.3 MB). Peak memory consumption was 51.9 MB. Max. memory is 7.1 GB. [2020-09-11 16:20:15,765 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-11 16:20:15,766 INFO L168 Benchmark]: CACSL2BoogieTranslator took 785.69 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 101.3 MB in the beginning and 162.1 MB in the end (delta: -60.9 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB. [2020-09-11 16:20:15,766 INFO L168 Benchmark]: Boogie Procedure Inliner took 89.32 ms. Allocated memory is still 202.9 MB. Free memory was 162.1 MB in the beginning and 160.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-09-11 16:20:15,766 INFO L168 Benchmark]: Boogie Preprocessor took 32.11 ms. Allocated memory is still 202.9 MB. Free memory was 160.2 MB in the beginning and 158.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-11 16:20:15,768 INFO L168 Benchmark]: RCFGBuilder took 499.60 ms. Allocated memory is still 202.9 MB. Free memory was 158.9 MB in the beginning and 138.9 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-09-11 16:20:15,768 INFO L168 Benchmark]: TraceAbstraction took 246458.51 ms. Allocated memory was 202.9 MB in the beginning and 220.2 MB in the end (delta: 17.3 MB). Free memory was 138.3 MB in the beginning and 130.3 MB in the end (delta: 8.0 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB. [2020-09-11 16:20:15,770 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 785.69 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 101.3 MB in the beginning and 162.1 MB in the end (delta: -60.9 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 89.32 ms. Allocated memory is still 202.9 MB. Free memory was 162.1 MB in the beginning and 160.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.11 ms. Allocated memory is still 202.9 MB. Free memory was 160.2 MB in the beginning and 158.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 499.60 ms. Allocated memory is still 202.9 MB. Free memory was 158.9 MB in the beginning and 138.9 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 246458.51 ms. Allocated memory was 202.9 MB in the beginning and 220.2 MB in the end (delta: 17.3 MB). Free memory was 138.3 MB in the beginning and 130.3 MB in the end (delta: 8.0 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 703]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 703). Cancelled while BasicCegarLoop was analyzing trace of length 28 with TraceHistMax 10,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 21 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 246.3s, OverallIterations: 206, TraceHistogramMax: 10, AutomataDifference: 136.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 3254 SDtfs, 11048 SDslu, 20921 SDs, 0 SdLazy, 22502 SolverSat, 12207 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 26.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10828 GetRequests, 3596 SyntacticMatches, 200 SemanticMatches, 7032 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64945 ImplicationChecksByTransitivity, 140.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=195, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 205 MinimizatonAttempts, 4993 StatesRemovedByMinimization, 204 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.8s SsaConstructionTime, 5.8s SatisfiabilityAnalysisTime, 50.3s InterpolantComputationTime, 8252 NumberOfCodeBlocks, 8252 NumberOfCodeBlocksAsserted, 1024 NumberOfCheckSat, 7847 ConstructedInterpolants, 0 QuantifiedInterpolants, 732031 SizeOfPredicates, 2504 NumberOfNonLiveVariables, 25320 ConjunctsInSsa, 3314 ConjunctsInUnsatCore, 405 InterpolantComputations, 5 PerfectInterpolantSequences, 0/15144 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown